chore(deps): bump github.com/prometheus/client_golang from 1.17.0 to 1.18.0 (#1894)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -5,6 +5,30 @@
   "imageSize": 100,
   "commit": false,
   "contributors": [
+    {
+      "login": "piksel",
+      "name": "nils måsén",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/807383?v=4",
+      "profile": "https://piksel.se",
+      "contributions": [
+        "code",
+        "doc",
+        "maintenance",
+        "review"
+      ]
+    },
+    {
+      "login": "simskij",
+      "name": "Simon Aronsson",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1596025?v=4",
+      "profile": "http://simme.dev",
+      "contributions": [
+        "code",
+        "doc",
+        "maintenance",
+        "review"
+      ]
+    },
     {
       "login": "Codelica",
       "name": "James",
@@ -273,18 +297,6 @@
         "code"
       ]
     },
-    {
-      "login": "simskij",
-      "name": "Simon Aronsson",
-      "avatar_url": "https://avatars0.githubusercontent.com/u/1596025?v=4",
-      "profile": "http://simme.dev",
-      "contributions": [
-        "code",
-        "maintenance",
-        "review",
-        "doc"
-      ]
-    },
     {
       "login": "Ansem93",
       "name": "Ansem93",
@@ -508,16 +520,6 @@
         "doc"
       ]
     },
-    {
-      "login": "piksel",
-      "name": "nils måsén",
-      "avatar_url": "https://avatars2.githubusercontent.com/u/807383?v=4",
-      "profile": "https://piksel.se",
-      "contributions": [
-        "doc",
-        "code"
-      ]
-    },
     {
       "login": "arnested",
       "name": "Arne Jørgensen",
@@ -841,6 +843,12 @@
         "code"
       ]
     },
+    {
+      "login": "andriibratanin",
+      "name": "Andrii Bratanin",
+      "avatar_url": "https://avatars.githubusercontent.com/u/20169213?v=4",
+      "profile": "https://github.com/andriibratanin"
+    },
     {
       "login": "IAmTamal",
       "name": "Tamal Das ",
@@ -849,6 +857,25 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "testwill",
+      "name": "guangwu",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8717479?v=4",
+      "profile": "https://github.com/testwill",
+      "contributions": [
+        "doc"
+      ]
+    },
+    {
+      "login": "nothub",
+      "name": "Florian Hübner",
+      "avatar_url": "https://avatars.githubusercontent.com/u/48992448?v=4",
+      "profile": "http://hub.lol",
+      "contributions": [
+        "doc",
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,
@@ -857,5 +884,6 @@
   "repoType": "github",
   "repoHost": "https://github.com",
   "commitConvention": "none",
-  "skipCi": true
+  "skipCi": true,
+  "commitType": "docs"
 }

.github/workflows/codeql-analysis.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
@@ -44,7 +44,7 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -55,7 +55,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@v3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -69,4 +69,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3

.github/workflows/dependabot-approve.yml

@@ -0,0 +1,12 @@
+name: Auto approve dependabot PRs
+
+on: pull_request_target
+
+jobs:
+  auto-approve:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - uses: hmarr/auto-approve-action@v3

.github/workflows/publish-docs.yml

@@ -14,11 +14,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.20.x
+      - name: Build tplprev
+        run: scripts/build-tplprev.sh
       - name: Setup python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.10'
           cache: 'pip'

.github/workflows/pull-request.yml

@@ -12,16 +12,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
-      - uses: dominikh/staticcheck-action@a3513ade2e5cb8075ba1c1ed1890a989cf0f2aa0 #v1.2.0
+          go-version: 1.20.x
+      - uses: dominikh/staticcheck-action@ba605356b4b29a60e87ab9404b712f3461e566dc #v1.3.0
         with:
-          version: "2022.1.1"
+          version: "2023.1.6"
           install-go: "false" # StaticCheck uses go v1.17 which does not support `any`
   test:
     name: Test
@@ -29,7 +29,7 @@ jobs:
       fail-fast: false
       matrix:
         go-version:
-          - 1.18.x
+          - 1.20.x
         platform:
           - macos-latest
           - windows-latest
@@ -37,13 +37,13 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
+          go-version: 1.20.x
       - name: Run tests
         run: |
           go test -v -coverprofile coverage.out -covermode atomic ./... 
@@ -56,15 +56,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
+          go-version: 1.20.x
       - name: Build
-        uses: goreleaser/goreleaser-action@b508e2e3ef3b19d4e4146d4f8fb3ba9db644a757 #v3
+        uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 #v3
         with:
           version: v0.155.0
           args: --snapshot --skip-publish --debug

.github/workflows/release-dev.yaml

@@ -10,21 +10,23 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up Go
-        uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
         with:
-          go-version: 1.18
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.20.x
       - name: Build
         run: ./build.sh
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18
+          go-version: 1.20.x
       - name: Test
         run: go test -v -coverprofile coverage.out -covermode atomic ./... 
       - name: Publish coverage
@@ -37,7 +39,7 @@ jobs:
       - test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Publish to Docker Hub
         uses: jerray/publish-docker-action@87d84711629b0dc9f6bb127b568413cc92a2088e #master@2022-10-14
         with:

.github/workflows/release.yml

@@ -2,9 +2,7 @@ name: Release (Production)
 
 on:
   workflow_dispatch: {}
-  release:
-    types:
-      - created
+  push:
     tags:
       - 'v[0-9]+.[0-9]+.[0-9]+'
       - '**/v[0-9]+.[0-9]+.[0-9]+'
@@ -15,14 +13,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
-      - uses: dominikh/staticcheck-action@a3513ade2e5cb8075ba1c1ed1890a989cf0f2aa0 #v1.2.0
+          go-version: 1.20.x
+      - uses: dominikh/staticcheck-action@ba605356b4b29a60e87ab9404b712f3461e566dc #v1.3.0
         with:
           version: "2022.1.1"
           install-go: "false" # StaticCheck uses go v1.17 which does not support `any`
@@ -32,7 +30,7 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - 1.18.x
+          - 1.20.x
         platform:
           - ubuntu-latest
           - macos-latest
@@ -40,13 +38,13 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
+          go-version: 1.20.x
       - name: Run tests
         run: |
           go test ./... -coverprofile coverage.out
@@ -59,29 +57,29 @@ jobs:
       - lint
     env:
       CGO_ENABLED: 0
-      TAG: ${{ github.event.release.tag_name }}
+      TAG: ${{ github.ref_name }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.18.x
+          go-version: 1.20.x
       - name: Login to Docker Hub
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a #v2
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc #v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Login to GHCR
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a #v2
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc #v2
         with:
           username: ${{ secrets.BOT_USERNAME }}
           password: ${{ secrets.BOT_GHCR_PAT }}
           registry: ghcr.io
       - name: Build
-        uses: goreleaser/goreleaser-action@b508e2e3ef3b19d4e4146d4f8fb3ba9db644a757 #v3
+        uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 #v3
         with:
           version: v0.155.0
           args: --debug
@@ -93,7 +91,7 @@ jobs:
           echo '{"experimental": "enabled"}' > ~/.docker/config.json
       - name: Create manifest for version
         run: |
-          export DH_TAG=$(echo $TAG | sed 's/^v*//')
+          export DH_TAG=$(git tag --points-at HEAD | sed 's/^v*//')
           docker manifest create \
             containrrr/watchtower:$DH_TAG \
             containrrr/watchtower:amd64-$DH_TAG \
@@ -191,7 +189,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Pull new module version
-      uses: andrewslotin/go-proxy-pull-action@bfc19ec6536e1638181b2ad6a03e16c7ccfb122f #master@2022-10-14
+      uses: andrewslotin/go-proxy-pull-action@50fea06a976087614babb9508e5c528b464f4645 #master@2022-10-14
 
   
   

.gitignore

@@ -8,3 +8,6 @@ dist
 /site
 coverage.out
 *.coverprofile
+
+docs/assets/wasm_exec.js
+docs/assets/*.wasm

README.md

@@ -31,6 +31,8 @@ $ docker run --detach \
     containrrr/watchtower
 ```
 
+Watchtower is intended to be used in homelabs, media centers, local dev environments, and similar. We do **not** recommend using Watchtower in a commercial or production environment. If that is you, you should be looking into using Kubernetes. If that feels like too big a step for you, please look into solutions like [MicroK8s](https://microk8s.io/) and [k3s](https://k3s.io/) that take away a lot of the toil of running a Kubernetes cluster. 
+
 ## Documentation
 The full documentation is available at https://containrrr.dev/watchtower.
 
@@ -44,126 +46,128 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <table>
   <tbody>
     <tr>
-      <td align="center"><a href="http://codelica.com"><img src="https://avatars3.githubusercontent.com/u/386101?v=4?s=100" width="100px;" alt="James"/><br /><sub><b>James</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Codelica" title="Tests">⚠️</a> <a href="#ideas-Codelica" title="Ideas, Planning, & Feedback">🤔</a></td>
-      <td align="center"><a href="https://kopfkrieg.org"><img src="https://avatars2.githubusercontent.com/u/5047813?v=4?s=100" width="100px;" alt="Florian"/><br /><sub><b>Florian</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3AKopfKrieg" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/containrrr/watchtower/commits?author=KopfKrieg" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/bdehamer"><img src="https://avatars1.githubusercontent.com/u/398027?v=4?s=100" width="100px;" alt="Brian DeHamer"/><br /><sub><b>Brian DeHamer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bdehamer" title="Code">💻</a> <a href="#maintenance-bdehamer" title="Maintenance">🚧</a></td>
-      <td align="center"><a href="https://github.com/rosscado"><img src="https://avatars1.githubusercontent.com/u/16578183?v=4?s=100" width="100px;" alt="Ross Cadogan"/><br /><sub><b>Ross Cadogan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rosscado" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/stffabi"><img src="https://avatars0.githubusercontent.com/u/9464631?v=4?s=100" width="100px;" alt="stffabi"/><br /><sub><b>stffabi</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=stffabi" title="Code">💻</a> <a href="#maintenance-stffabi" title="Maintenance">🚧</a></td>
-      <td align="center"><a href="https://github.com/ATCUSA"><img src="https://avatars3.githubusercontent.com/u/3581228?v=4?s=100" width="100px;" alt="Austin"/><br /><sub><b>Austin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ATCUSA" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://labs.ctl.io"><img src="https://avatars2.githubusercontent.com/u/6181487?v=4?s=100" width="100px;" alt="David Gardner"/><br /><sub><b>David Gardner</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Adavidgardner11" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/containrrr/watchtower/commits?author=davidgardner11" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://piksel.se"><img src="https://avatars2.githubusercontent.com/u/807383?v=4?s=100" width="100px;" alt="nils måsén"/><br /><sub><b>nils måsén</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=piksel" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=piksel" title="Documentation">📖</a> <a href="#maintenance-piksel" title="Maintenance">🚧</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Apiksel" title="Reviewed Pull Requests">👀</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://simme.dev"><img src="https://avatars0.githubusercontent.com/u/1596025?v=4?s=100" width="100px;" alt="Simon Aronsson"/><br /><sub><b>Simon Aronsson</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=simskij" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=simskij" title="Documentation">📖</a> <a href="#maintenance-simskij" title="Maintenance">🚧</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Asimskij" title="Reviewed Pull Requests">👀</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://codelica.com"><img src="https://avatars3.githubusercontent.com/u/386101?v=4?s=100" width="100px;" alt="James"/><br /><sub><b>James</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Codelica" title="Tests">⚠️</a> <a href="#ideas-Codelica" title="Ideas, Planning, & Feedback">🤔</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://kopfkrieg.org"><img src="https://avatars2.githubusercontent.com/u/5047813?v=4?s=100" width="100px;" alt="Florian"/><br /><sub><b>Florian</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3AKopfKrieg" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/containrrr/watchtower/commits?author=KopfKrieg" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/bdehamer"><img src="https://avatars1.githubusercontent.com/u/398027?v=4?s=100" width="100px;" alt="Brian DeHamer"/><br /><sub><b>Brian DeHamer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bdehamer" title="Code">💻</a> <a href="#maintenance-bdehamer" title="Maintenance">🚧</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/rosscado"><img src="https://avatars1.githubusercontent.com/u/16578183?v=4?s=100" width="100px;" alt="Ross Cadogan"/><br /><sub><b>Ross Cadogan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rosscado" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/stffabi"><img src="https://avatars0.githubusercontent.com/u/9464631?v=4?s=100" width="100px;" alt="stffabi"/><br /><sub><b>stffabi</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=stffabi" title="Code">💻</a> <a href="#maintenance-stffabi" title="Maintenance">🚧</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/dolanor"><img src="https://avatars3.githubusercontent.com/u/928722?v=4?s=100" width="100px;" alt="Tanguy ⧓ Herrmann"/><br /><sub><b>Tanguy ⧓ Herrmann</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=dolanor" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/rdamazio"><img src="https://avatars3.githubusercontent.com/u/997641?v=4?s=100" width="100px;" alt="Rodrigo Damazio Bovendorp"/><br /><sub><b>Rodrigo Damazio Bovendorp</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rdamazio" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=rdamazio" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://www.taisun.io/"><img src="https://avatars3.githubusercontent.com/u/1852688?v=4?s=100" width="100px;" alt="Ryan Kuba"/><br /><sub><b>Ryan Kuba</b></sub></a><br /><a href="#infra-thelamer" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
-      <td align="center"><a href="https://github.com/cnrmck"><img src="https://avatars2.githubusercontent.com/u/22061955?v=4?s=100" width="100px;" alt="cnrmck"/><br /><sub><b>cnrmck</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=cnrmck" title="Documentation">📖</a></td>
-      <td align="center"><a href="http://harrywalter.co.uk"><img src="https://avatars3.githubusercontent.com/u/338588?v=4?s=100" width="100px;" alt="Harry Walter"/><br /><sub><b>Harry Walter</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=haswalt" title="Code">💻</a></td>
-      <td align="center"><a href="http://projectsperanza.com"><img src="https://avatars3.githubusercontent.com/u/74515?v=4?s=100" width="100px;" alt="Robotex"/><br /><sub><b>Robotex</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Robotex" title="Documentation">📖</a></td>
-      <td align="center"><a href="http://geraldpape.io"><img src="https://avatars0.githubusercontent.com/u/1494211?v=4?s=100" width="100px;" alt="Gerald Pape"/><br /><sub><b>Gerald Pape</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ubergesundheit" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/ATCUSA"><img src="https://avatars3.githubusercontent.com/u/3581228?v=4?s=100" width="100px;" alt="Austin"/><br /><sub><b>Austin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ATCUSA" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://labs.ctl.io"><img src="https://avatars2.githubusercontent.com/u/6181487?v=4?s=100" width="100px;" alt="David Gardner"/><br /><sub><b>David Gardner</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Adavidgardner11" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/containrrr/watchtower/commits?author=davidgardner11" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/dolanor"><img src="https://avatars3.githubusercontent.com/u/928722?v=4?s=100" width="100px;" alt="Tanguy ⧓ Herrmann"/><br /><sub><b>Tanguy ⧓ Herrmann</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=dolanor" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/rdamazio"><img src="https://avatars3.githubusercontent.com/u/997641?v=4?s=100" width="100px;" alt="Rodrigo Damazio Bovendorp"/><br /><sub><b>Rodrigo Damazio Bovendorp</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rdamazio" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=rdamazio" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.taisun.io/"><img src="https://avatars3.githubusercontent.com/u/1852688?v=4?s=100" width="100px;" alt="Ryan Kuba"/><br /><sub><b>Ryan Kuba</b></sub></a><br /><a href="#infra-thelamer" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/cnrmck"><img src="https://avatars2.githubusercontent.com/u/22061955?v=4?s=100" width="100px;" alt="cnrmck"/><br /><sub><b>cnrmck</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=cnrmck" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://harrywalter.co.uk"><img src="https://avatars3.githubusercontent.com/u/338588?v=4?s=100" width="100px;" alt="Harry Walter"/><br /><sub><b>Harry Walter</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=haswalt" title="Code">💻</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/fomk"><img src="https://avatars0.githubusercontent.com/u/17636183?v=4?s=100" width="100px;" alt="fomk"/><br /><sub><b>fomk</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=fomk" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/svengo"><img src="https://avatars3.githubusercontent.com/u/2502366?v=4?s=100" width="100px;" alt="Sven Gottwald"/><br /><sub><b>Sven Gottwald</b></sub></a><br /><a href="#infra-svengo" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
-      <td align="center"><a href="https://liberapay.com/techknowlogick/"><img src="https://avatars1.githubusercontent.com/u/164197?v=4?s=100" width="100px;" alt="techknowlogick"/><br /><sub><b>techknowlogick</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=techknowlogick" title="Code">💻</a></td>
-      <td align="center"><a href="http://log.c5t.org/about/"><img src="https://avatars1.githubusercontent.com/u/1449568?v=4?s=100" width="100px;" alt="waja"/><br /><sub><b>waja</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=waja" title="Documentation">📖</a></td>
-      <td align="center"><a href="http://scottalbertson.com"><img src="https://avatars2.githubusercontent.com/u/154463?v=4?s=100" width="100px;" alt="Scott Albertson"/><br /><sub><b>Scott Albertson</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=salbertson" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/huddlesj"><img src="https://avatars1.githubusercontent.com/u/11966535?v=4?s=100" width="100px;" alt="Jason Huddleston"/><br /><sub><b>Jason Huddleston</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=huddlesj" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://npstr.space/"><img src="https://avatars3.githubusercontent.com/u/6048348?v=4?s=100" width="100px;" alt="Napster"/><br /><sub><b>Napster</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=napstr" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://projectsperanza.com"><img src="https://avatars3.githubusercontent.com/u/74515?v=4?s=100" width="100px;" alt="Robotex"/><br /><sub><b>Robotex</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Robotex" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://geraldpape.io"><img src="https://avatars0.githubusercontent.com/u/1494211?v=4?s=100" width="100px;" alt="Gerald Pape"/><br /><sub><b>Gerald Pape</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ubergesundheit" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/fomk"><img src="https://avatars0.githubusercontent.com/u/17636183?v=4?s=100" width="100px;" alt="fomk"/><br /><sub><b>fomk</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=fomk" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/svengo"><img src="https://avatars3.githubusercontent.com/u/2502366?v=4?s=100" width="100px;" alt="Sven Gottwald"/><br /><sub><b>Sven Gottwald</b></sub></a><br /><a href="#infra-svengo" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://liberapay.com/techknowlogick/"><img src="https://avatars1.githubusercontent.com/u/164197?v=4?s=100" width="100px;" alt="techknowlogick"/><br /><sub><b>techknowlogick</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=techknowlogick" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://log.c5t.org/about/"><img src="https://avatars1.githubusercontent.com/u/1449568?v=4?s=100" width="100px;" alt="waja"/><br /><sub><b>waja</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=waja" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://scottalbertson.com"><img src="https://avatars2.githubusercontent.com/u/154463?v=4?s=100" width="100px;" alt="Scott Albertson"/><br /><sub><b>Scott Albertson</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=salbertson" title="Documentation">📖</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/darknode"><img src="https://avatars1.githubusercontent.com/u/809429?v=4?s=100" width="100px;" alt="Maxim"/><br /><sub><b>Maxim</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=darknode" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=darknode" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://schmitt.cat"><img src="https://avatars0.githubusercontent.com/u/17984549?v=4?s=100" width="100px;" alt="Max Schmitt"/><br /><sub><b>Max Schmitt</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mxschmitt" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/cron410"><img src="https://avatars1.githubusercontent.com/u/3082899?v=4?s=100" width="100px;" alt="cron410"/><br /><sub><b>cron410</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=cron410" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/Cardoso222"><img src="https://avatars3.githubusercontent.com/u/7026517?v=4?s=100" width="100px;" alt="Paulo Henrique"/><br /><sub><b>Paulo Henrique</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Cardoso222" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://coded.io"><img src="https://avatars0.githubusercontent.com/u/107097?v=4?s=100" width="100px;" alt="Kaleb Elwert"/><br /><sub><b>Kaleb Elwert</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=belak" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/wmbutler"><img src="https://avatars1.githubusercontent.com/u/1254810?v=4?s=100" width="100px;" alt="Bill Butler"/><br /><sub><b>Bill Butler</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=wmbutler" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://www.mariotacke.io"><img src="https://avatars2.githubusercontent.com/u/4942019?v=4?s=100" width="100px;" alt="Mario Tacke"/><br /><sub><b>Mario Tacke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mariotacke" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/huddlesj"><img src="https://avatars1.githubusercontent.com/u/11966535?v=4?s=100" width="100px;" alt="Jason Huddleston"/><br /><sub><b>Jason Huddleston</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=huddlesj" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://npstr.space/"><img src="https://avatars3.githubusercontent.com/u/6048348?v=4?s=100" width="100px;" alt="Napster"/><br /><sub><b>Napster</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=napstr" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/darknode"><img src="https://avatars1.githubusercontent.com/u/809429?v=4?s=100" width="100px;" alt="Maxim"/><br /><sub><b>Maxim</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=darknode" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=darknode" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://schmitt.cat"><img src="https://avatars0.githubusercontent.com/u/17984549?v=4?s=100" width="100px;" alt="Max Schmitt"/><br /><sub><b>Max Schmitt</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mxschmitt" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/cron410"><img src="https://avatars1.githubusercontent.com/u/3082899?v=4?s=100" width="100px;" alt="cron410"/><br /><sub><b>cron410</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=cron410" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Cardoso222"><img src="https://avatars3.githubusercontent.com/u/7026517?v=4?s=100" width="100px;" alt="Paulo Henrique"/><br /><sub><b>Paulo Henrique</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Cardoso222" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://coded.io"><img src="https://avatars0.githubusercontent.com/u/107097?v=4?s=100" width="100px;" alt="Kaleb Elwert"/><br /><sub><b>Kaleb Elwert</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=belak" title="Documentation">📖</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://markwoodbridge.com"><img src="https://avatars2.githubusercontent.com/u/1101318?v=4?s=100" width="100px;" alt="Mark Woodbridge"/><br /><sub><b>Mark Woodbridge</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mrw34" title="Code">💻</a></td>
-      <td align="center"><a href="http://simme.dev"><img src="https://avatars0.githubusercontent.com/u/1596025?v=4?s=100" width="100px;" alt="Simon Aronsson"/><br /><sub><b>Simon Aronsson</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=simskij" title="Code">💻</a> <a href="#maintenance-simskij" title="Maintenance">🚧</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Asimskij" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/containrrr/watchtower/commits?author=simskij" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/Ansem93"><img src="https://avatars3.githubusercontent.com/u/6626218?v=4?s=100" width="100px;" alt="Ansem93"/><br /><sub><b>Ansem93</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Ansem93" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/lukapeschke"><img src="https://avatars1.githubusercontent.com/u/17085536?v=4?s=100" width="100px;" alt="Luka Peschke"/><br /><sub><b>Luka Peschke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=lukapeschke" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=lukapeschke" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/zoispag"><img src="https://avatars0.githubusercontent.com/u/21138205?v=4?s=100" width="100px;" alt="Zois Pagoulatos"/><br /><sub><b>Zois Pagoulatos</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=zoispag" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Azoispag" title="Reviewed Pull Requests">👀</a> <a href="#maintenance-zoispag" title="Maintenance">🚧</a></td>
-      <td align="center"><a href="https://alexandre.menif.name"><img src="https://avatars0.githubusercontent.com/u/16152103?v=4?s=100" width="100px;" alt="Alexandre Menif"/><br /><sub><b>Alexandre Menif</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=alexandremenif" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/chugunov"><img src="https://avatars1.githubusercontent.com/u/4140479?v=4?s=100" width="100px;" alt="Andrey"/><br /><sub><b>Andrey</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=chugunov" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/wmbutler"><img src="https://avatars1.githubusercontent.com/u/1254810?v=4?s=100" width="100px;" alt="Bill Butler"/><br /><sub><b>Bill Butler</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=wmbutler" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.mariotacke.io"><img src="https://avatars2.githubusercontent.com/u/4942019?v=4?s=100" width="100px;" alt="Mario Tacke"/><br /><sub><b>Mario Tacke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mariotacke" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://markwoodbridge.com"><img src="https://avatars2.githubusercontent.com/u/1101318?v=4?s=100" width="100px;" alt="Mark Woodbridge"/><br /><sub><b>Mark Woodbridge</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mrw34" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Ansem93"><img src="https://avatars3.githubusercontent.com/u/6626218?v=4?s=100" width="100px;" alt="Ansem93"/><br /><sub><b>Ansem93</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Ansem93" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/lukapeschke"><img src="https://avatars1.githubusercontent.com/u/17085536?v=4?s=100" width="100px;" alt="Luka Peschke"/><br /><sub><b>Luka Peschke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=lukapeschke" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=lukapeschke" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/zoispag"><img src="https://avatars0.githubusercontent.com/u/21138205?v=4?s=100" width="100px;" alt="Zois Pagoulatos"/><br /><sub><b>Zois Pagoulatos</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=zoispag" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Azoispag" title="Reviewed Pull Requests">👀</a> <a href="#maintenance-zoispag" title="Maintenance">🚧</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://alexandre.menif.name"><img src="https://avatars0.githubusercontent.com/u/16152103?v=4?s=100" width="100px;" alt="Alexandre Menif"/><br /><sub><b>Alexandre Menif</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=alexandremenif" title="Code">💻</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://noplanman.ch"><img src="https://avatars3.githubusercontent.com/u/9423417?v=4?s=100" width="100px;" alt="Armando Lüscher"/><br /><sub><b>Armando Lüscher</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=noplanman" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/rjbudke"><img src="https://avatars2.githubusercontent.com/u/273485?v=4?s=100" width="100px;" alt="Ryan Budke"/><br /><sub><b>Ryan Budke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rjbudke" title="Documentation">📖</a></td>
-      <td align="center"><a href="http://kaloyan.raev.name"><img src="https://avatars2.githubusercontent.com/u/468091?v=4?s=100" width="100px;" alt="Kaloyan Raev"/><br /><sub><b>Kaloyan Raev</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Tests">⚠️</a></td>
-      <td align="center"><a href="https://github.com/sixth"><img src="https://avatars3.githubusercontent.com/u/11591445?v=4?s=100" width="100px;" alt="sixth"/><br /><sub><b>sixth</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=sixth" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://foosel.net"><img src="https://avatars0.githubusercontent.com/u/83657?v=4?s=100" width="100px;" alt="Gina Häußge"/><br /><sub><b>Gina Häußge</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=foosel" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/8ear"><img src="https://avatars0.githubusercontent.com/u/10329648?v=4?s=100" width="100px;" alt="Max H."/><br /><sub><b>Max H.</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=8ear" title="Code">💻</a></td>
-      <td align="center"><a href="https://pjknkda.github.io"><img src="https://avatars0.githubusercontent.com/u/4986524?v=4?s=100" width="100px;" alt="Jungkook Park"/><br /><sub><b>Jungkook Park</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=pjknkda" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/chugunov"><img src="https://avatars1.githubusercontent.com/u/4140479?v=4?s=100" width="100px;" alt="Andrey"/><br /><sub><b>Andrey</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=chugunov" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://noplanman.ch"><img src="https://avatars3.githubusercontent.com/u/9423417?v=4?s=100" width="100px;" alt="Armando Lüscher"/><br /><sub><b>Armando Lüscher</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=noplanman" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/rjbudke"><img src="https://avatars2.githubusercontent.com/u/273485?v=4?s=100" width="100px;" alt="Ryan Budke"/><br /><sub><b>Ryan Budke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rjbudke" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://kaloyan.raev.name"><img src="https://avatars2.githubusercontent.com/u/468091?v=4?s=100" width="100px;" alt="Kaloyan Raev"/><br /><sub><b>Kaloyan Raev</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Tests">⚠️</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/sixth"><img src="https://avatars3.githubusercontent.com/u/11591445?v=4?s=100" width="100px;" alt="sixth"/><br /><sub><b>sixth</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=sixth" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://foosel.net"><img src="https://avatars0.githubusercontent.com/u/83657?v=4?s=100" width="100px;" alt="Gina Häußge"/><br /><sub><b>Gina Häußge</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=foosel" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/8ear"><img src="https://avatars0.githubusercontent.com/u/10329648?v=4?s=100" width="100px;" alt="Max H."/><br /><sub><b>Max H.</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=8ear" title="Code">💻</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://achfrag.net"><img src="https://avatars1.githubusercontent.com/u/5753622?v=4?s=100" width="100px;" alt="Jan Kristof Nidzwetzki"/><br /><sub><b>Jan Kristof Nidzwetzki</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jnidzwetzki" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://www.lukaselsner.de"><img src="https://avatars0.githubusercontent.com/u/1413542?v=4?s=100" width="100px;" alt="lukas"/><br /><sub><b>lukas</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mindrunner" title="Code">💻</a></td>
-      <td align="center"><a href="https://codingcoffee.dev"><img src="https://avatars3.githubusercontent.com/u/13611153?v=4?s=100" width="100px;" alt="Ameya Shenoy"/><br /><sub><b>Ameya Shenoy</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=codingCoffee" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/raymondelooff"><img src="https://avatars0.githubusercontent.com/u/9716806?v=4?s=100" width="100px;" alt="Raymon de Looff"/><br /><sub><b>Raymon de Looff</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=raymondelooff" title="Code">💻</a></td>
-      <td align="center"><a href="http://codemonkeylabs.com"><img src="https://avatars2.githubusercontent.com/u/704034?v=4?s=100" width="100px;" alt="John Clayton"/><br /><sub><b>John Clayton</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jsclayton" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/Germs2004"><img src="https://avatars2.githubusercontent.com/u/5519340?v=4?s=100" width="100px;" alt="Germs2004"/><br /><sub><b>Germs2004</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Germs2004" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/lukwil"><img src="https://avatars1.githubusercontent.com/u/30203234?v=4?s=100" width="100px;" alt="Lukas Willburger"/><br /><sub><b>Lukas Willburger</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=lukwil" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://pjknkda.github.io"><img src="https://avatars0.githubusercontent.com/u/4986524?v=4?s=100" width="100px;" alt="Jungkook Park"/><br /><sub><b>Jungkook Park</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=pjknkda" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://achfrag.net"><img src="https://avatars1.githubusercontent.com/u/5753622?v=4?s=100" width="100px;" alt="Jan Kristof Nidzwetzki"/><br /><sub><b>Jan Kristof Nidzwetzki</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jnidzwetzki" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.lukaselsner.de"><img src="https://avatars0.githubusercontent.com/u/1413542?v=4?s=100" width="100px;" alt="lukas"/><br /><sub><b>lukas</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mindrunner" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://codingcoffee.dev"><img src="https://avatars3.githubusercontent.com/u/13611153?v=4?s=100" width="100px;" alt="Ameya Shenoy"/><br /><sub><b>Ameya Shenoy</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=codingCoffee" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/raymondelooff"><img src="https://avatars0.githubusercontent.com/u/9716806?v=4?s=100" width="100px;" alt="Raymon de Looff"/><br /><sub><b>Raymon de Looff</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=raymondelooff" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://codemonkeylabs.com"><img src="https://avatars2.githubusercontent.com/u/704034?v=4?s=100" width="100px;" alt="John Clayton"/><br /><sub><b>John Clayton</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jsclayton" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Germs2004"><img src="https://avatars2.githubusercontent.com/u/5519340?v=4?s=100" width="100px;" alt="Germs2004"/><br /><sub><b>Germs2004</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Germs2004" title="Documentation">📖</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/auanasgheps"><img src="https://avatars2.githubusercontent.com/u/20586878?v=4?s=100" width="100px;" alt="Oliver Cervera"/><br /><sub><b>Oliver Cervera</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=auanasgheps" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/victorcmoura"><img src="https://avatars1.githubusercontent.com/u/26290053?v=4?s=100" width="100px;" alt="Victor Moura"/><br /><sub><b>Victor Moura</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Tests">⚠️</a> <a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/mbrandau"><img src="https://avatars3.githubusercontent.com/u/12972798?v=4?s=100" width="100px;" alt="Maximilian Brandau"/><br /><sub><b>Maximilian Brandau</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mbrandau" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=mbrandau" title="Tests">⚠️</a></td>
-      <td align="center"><a href="https://github.com/aneisch"><img src="https://avatars1.githubusercontent.com/u/6991461?v=4?s=100" width="100px;" alt="Andrew"/><br /><sub><b>Andrew</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=aneisch" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/sixcorners"><img src="https://avatars0.githubusercontent.com/u/585501?v=4?s=100" width="100px;" alt="sixcorners"/><br /><sub><b>sixcorners</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=sixcorners" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://piksel.se"><img src="https://avatars2.githubusercontent.com/u/807383?v=4?s=100" width="100px;" alt="nils måsén"/><br /><sub><b>nils måsén</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=piksel" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=piksel" title="Code">💻</a></td>
-      <td align="center"><a href="https://arnested.dk"><img src="https://avatars2.githubusercontent.com/u/190005?v=4?s=100" width="100px;" alt="Arne Jørgensen"/><br /><sub><b>Arne Jørgensen</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=arnested" title="Tests">⚠️</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Aarnested" title="Reviewed Pull Requests">👀</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/lukwil"><img src="https://avatars1.githubusercontent.com/u/30203234?v=4?s=100" width="100px;" alt="Lukas Willburger"/><br /><sub><b>Lukas Willburger</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=lukwil" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/auanasgheps"><img src="https://avatars2.githubusercontent.com/u/20586878?v=4?s=100" width="100px;" alt="Oliver Cervera"/><br /><sub><b>Oliver Cervera</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=auanasgheps" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/victorcmoura"><img src="https://avatars1.githubusercontent.com/u/26290053?v=4?s=100" width="100px;" alt="Victor Moura"/><br /><sub><b>Victor Moura</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Tests">⚠️</a> <a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=victorcmoura" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/mbrandau"><img src="https://avatars3.githubusercontent.com/u/12972798?v=4?s=100" width="100px;" alt="Maximilian Brandau"/><br /><sub><b>Maximilian Brandau</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mbrandau" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=mbrandau" title="Tests">⚠️</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/aneisch"><img src="https://avatars1.githubusercontent.com/u/6991461?v=4?s=100" width="100px;" alt="Andrew"/><br /><sub><b>Andrew</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=aneisch" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/sixcorners"><img src="https://avatars0.githubusercontent.com/u/585501?v=4?s=100" width="100px;" alt="sixcorners"/><br /><sub><b>sixcorners</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=sixcorners" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://arnested.dk"><img src="https://avatars2.githubusercontent.com/u/190005?v=4?s=100" width="100px;" alt="Arne Jørgensen"/><br /><sub><b>Arne Jørgensen</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=arnested" title="Tests">⚠️</a> <a href="https://github.com/containrrr/watchtower/pulls?q=is%3Apr+reviewed-by%3Aarnested" title="Reviewed Pull Requests">👀</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/patski123"><img src="https://avatars1.githubusercontent.com/u/19295295?v=4?s=100" width="100px;" alt="PatSki123"/><br /><sub><b>PatSki123</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=patski123" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://rubyroidlabs.com/"><img src="https://avatars2.githubusercontent.com/u/624999?v=4?s=100" width="100px;" alt="Valentine Zavadsky"/><br /><sub><b>Valentine Zavadsky</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Tests">⚠️</a></td>
-      <td align="center"><a href="https://github.com/bopoh24"><img src="https://avatars2.githubusercontent.com/u/4086631?v=4?s=100" width="100px;" alt="Alexander Voronin"/><br /><sub><b>Alexander Voronin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bopoh24" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/issues?q=author%3Abopoh24" title="Bug reports">🐛</a></td>
-      <td align="center"><a href="http://www.teqneers.de"><img src="https://avatars0.githubusercontent.com/u/788989?v=4?s=100" width="100px;" alt="Oliver Mueller"/><br /><sub><b>Oliver Mueller</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ogmueller" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/tammert"><img src="https://avatars0.githubusercontent.com/u/8885250?v=4?s=100" width="100px;" alt="Sebastiaan Tammer"/><br /><sub><b>Sebastiaan Tammer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=tammert" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/Miosame"><img src="https://avatars1.githubusercontent.com/u/8201077?v=4?s=100" width="100px;" alt="miosame"/><br /><sub><b>miosame</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=miosame" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://mtz.gr"><img src="https://avatars3.githubusercontent.com/u/590246?v=4?s=100" width="100px;" alt="Andrew Metzger"/><br /><sub><b>Andrew Metzger</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/issues?q=author%3Aandrewjmetzger" title="Bug reports">🐛</a> <a href="#example-andrewjmetzger" title="Examples">💡</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/patski123"><img src="https://avatars1.githubusercontent.com/u/19295295?v=4?s=100" width="100px;" alt="PatSki123"/><br /><sub><b>PatSki123</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=patski123" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://rubyroidlabs.com/"><img src="https://avatars2.githubusercontent.com/u/624999?v=4?s=100" width="100px;" alt="Valentine Zavadsky"/><br /><sub><b>Valentine Zavadsky</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=Saicheg" title="Tests">⚠️</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/bopoh24"><img src="https://avatars2.githubusercontent.com/u/4086631?v=4?s=100" width="100px;" alt="Alexander Voronin"/><br /><sub><b>Alexander Voronin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bopoh24" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/issues?q=author%3Abopoh24" title="Bug reports">🐛</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://www.teqneers.de"><img src="https://avatars0.githubusercontent.com/u/788989?v=4?s=100" width="100px;" alt="Oliver Mueller"/><br /><sub><b>Oliver Mueller</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ogmueller" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/tammert"><img src="https://avatars0.githubusercontent.com/u/8885250?v=4?s=100" width="100px;" alt="Sebastiaan Tammer"/><br /><sub><b>Sebastiaan Tammer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=tammert" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Miosame"><img src="https://avatars1.githubusercontent.com/u/8201077?v=4?s=100" width="100px;" alt="miosame"/><br /><sub><b>miosame</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=miosame" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://mtz.gr"><img src="https://avatars3.githubusercontent.com/u/590246?v=4?s=100" width="100px;" alt="Andrew Metzger"/><br /><sub><b>Andrew Metzger</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/issues?q=author%3Aandrewjmetzger" title="Bug reports">🐛</a> <a href="#example-andrewjmetzger" title="Examples">💡</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/pgrimaud"><img src="https://avatars1.githubusercontent.com/u/1866496?v=4?s=100" width="100px;" alt="Pierre Grimaud"/><br /><sub><b>Pierre Grimaud</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=pgrimaud" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/mattdoran"><img src="https://avatars0.githubusercontent.com/u/577779?v=4?s=100" width="100px;" alt="Matt Doran"/><br /><sub><b>Matt Doran</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mattdoran" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/MihailITPlace"><img src="https://avatars2.githubusercontent.com/u/28401551?v=4?s=100" width="100px;" alt="MihailITPlace"/><br /><sub><b>MihailITPlace</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=MihailITPlace" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/bugficks"><img src="https://avatars1.githubusercontent.com/u/2992895?v=4?s=100" width="100px;" alt="bugficks"/><br /><sub><b>bugficks</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bugficks" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=bugficks" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/MichaelSp"><img src="https://avatars0.githubusercontent.com/u/448282?v=4?s=100" width="100px;" alt="Michael"/><br /><sub><b>Michael</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=MichaelSp" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/jokay"><img src="https://avatars0.githubusercontent.com/u/18613935?v=4?s=100" width="100px;" alt="D. Domig"/><br /><sub><b>D. Domig</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jokay" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://maxwells-daemon.io"><img src="https://avatars1.githubusercontent.com/u/260084?v=4?s=100" width="100px;" alt="Ben Osheroff"/><br /><sub><b>Ben Osheroff</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=osheroff" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/pgrimaud"><img src="https://avatars1.githubusercontent.com/u/1866496?v=4?s=100" width="100px;" alt="Pierre Grimaud"/><br /><sub><b>Pierre Grimaud</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=pgrimaud" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/mattdoran"><img src="https://avatars0.githubusercontent.com/u/577779?v=4?s=100" width="100px;" alt="Matt Doran"/><br /><sub><b>Matt Doran</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=mattdoran" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/MihailITPlace"><img src="https://avatars2.githubusercontent.com/u/28401551?v=4?s=100" width="100px;" alt="MihailITPlace"/><br /><sub><b>MihailITPlace</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=MihailITPlace" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/bugficks"><img src="https://avatars1.githubusercontent.com/u/2992895?v=4?s=100" width="100px;" alt="bugficks"/><br /><sub><b>bugficks</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=bugficks" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=bugficks" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/MichaelSp"><img src="https://avatars0.githubusercontent.com/u/448282?v=4?s=100" width="100px;" alt="Michael"/><br /><sub><b>Michael</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=MichaelSp" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/jokay"><img src="https://avatars0.githubusercontent.com/u/18613935?v=4?s=100" width="100px;" alt="D. Domig"/><br /><sub><b>D. Domig</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jokay" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://maxwells-daemon.io"><img src="https://avatars1.githubusercontent.com/u/260084?v=4?s=100" width="100px;" alt="Ben Osheroff"/><br /><sub><b>Ben Osheroff</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=osheroff" title="Code">💻</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/dhet"><img src="https://avatars3.githubusercontent.com/u/2668621?v=4?s=100" width="100px;" alt="David H."/><br /><sub><b>David H.</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=dhet" title="Code">💻</a></td>
-      <td align="center"><a href="http://www.gridgeo.com"><img src="https://avatars1.githubusercontent.com/u/671887?v=4?s=100" width="100px;" alt="Chander Ganesan"/><br /><sub><b>Chander Ganesan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=chander" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/yrien30"><img src="https://avatars1.githubusercontent.com/u/26816162?v=4?s=100" width="100px;" alt="yrien30"/><br /><sub><b>yrien30</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=yrien30" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/ksurl"><img src="https://avatars1.githubusercontent.com/u/1371562?v=4?s=100" width="100px;" alt="ksurl"/><br /><sub><b>ksurl</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ksurl" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=ksurl" title="Code">💻</a> <a href="#infra-ksurl" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
-      <td align="center"><a href="https://github.com/rg9400"><img src="https://avatars2.githubusercontent.com/u/39887349?v=4?s=100" width="100px;" alt="rg9400"/><br /><sub><b>rg9400</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rg9400" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/tkalus"><img src="https://avatars2.githubusercontent.com/u/287181?v=4?s=100" width="100px;" alt="Turtle Kalus"/><br /><sub><b>Turtle Kalus</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=tkalus" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/SrihariThalla"><img src="https://avatars1.githubusercontent.com/u/7479937?v=4?s=100" width="100px;" alt="Srihari Thalla"/><br /><sub><b>Srihari Thalla</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=SrihariThalla" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/dhet"><img src="https://avatars3.githubusercontent.com/u/2668621?v=4?s=100" width="100px;" alt="David H."/><br /><sub><b>David H.</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=dhet" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://www.gridgeo.com"><img src="https://avatars1.githubusercontent.com/u/671887?v=4?s=100" width="100px;" alt="Chander Ganesan"/><br /><sub><b>Chander Ganesan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=chander" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/yrien30"><img src="https://avatars1.githubusercontent.com/u/26816162?v=4?s=100" width="100px;" alt="yrien30"/><br /><sub><b>yrien30</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=yrien30" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/ksurl"><img src="https://avatars1.githubusercontent.com/u/1371562?v=4?s=100" width="100px;" alt="ksurl"/><br /><sub><b>ksurl</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=ksurl" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=ksurl" title="Code">💻</a> <a href="#infra-ksurl" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/rg9400"><img src="https://avatars2.githubusercontent.com/u/39887349?v=4?s=100" width="100px;" alt="rg9400"/><br /><sub><b>rg9400</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rg9400" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/tkalus"><img src="https://avatars2.githubusercontent.com/u/287181?v=4?s=100" width="100px;" alt="Turtle Kalus"/><br /><sub><b>Turtle Kalus</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=tkalus" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/SrihariThalla"><img src="https://avatars1.githubusercontent.com/u/7479937?v=4?s=100" width="100px;" alt="Srihari Thalla"/><br /><sub><b>Srihari Thalla</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=SrihariThalla" title="Documentation">📖</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://nymous.io"><img src="https://avatars1.githubusercontent.com/u/4216559?v=4?s=100" width="100px;" alt="Thomas Gaudin"/><br /><sub><b>Thomas Gaudin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=nymous" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://indigo.re/"><img src="https://avatars.githubusercontent.com/u/2804645?v=4?s=100" width="100px;" alt="hydrargyrum"/><br /><sub><b>hydrargyrum</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=hydrargyrum" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://reinout.vanrees.org"><img src="https://avatars.githubusercontent.com/u/121433?v=4?s=100" width="100px;" alt="Reinout van Rees"/><br /><sub><b>Reinout van Rees</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=reinout" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/DasSkelett"><img src="https://avatars.githubusercontent.com/u/28812678?v=4?s=100" width="100px;" alt="DasSkelett"/><br /><sub><b>DasSkelett</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=DasSkelett" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/zenjabba"><img src="https://avatars.githubusercontent.com/u/679864?v=4?s=100" width="100px;" alt="zenjabba"/><br /><sub><b>zenjabba</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=zenjabba" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://quan.io"><img src="https://avatars.githubusercontent.com/u/3526705?v=4?s=100" width="100px;" alt="Dan Quan"/><br /><sub><b>Dan Quan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=djquan" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/modem7"><img src="https://avatars.githubusercontent.com/u/4349962?v=4?s=100" width="100px;" alt="modem7"/><br /><sub><b>modem7</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=modem7" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://nymous.io"><img src="https://avatars1.githubusercontent.com/u/4216559?v=4?s=100" width="100px;" alt="Thomas Gaudin"/><br /><sub><b>Thomas Gaudin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=nymous" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://indigo.re/"><img src="https://avatars.githubusercontent.com/u/2804645?v=4?s=100" width="100px;" alt="hydrargyrum"/><br /><sub><b>hydrargyrum</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=hydrargyrum" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://reinout.vanrees.org"><img src="https://avatars.githubusercontent.com/u/121433?v=4?s=100" width="100px;" alt="Reinout van Rees"/><br /><sub><b>Reinout van Rees</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=reinout" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/DasSkelett"><img src="https://avatars.githubusercontent.com/u/28812678?v=4?s=100" width="100px;" alt="DasSkelett"/><br /><sub><b>DasSkelett</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=DasSkelett" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/zenjabba"><img src="https://avatars.githubusercontent.com/u/679864?v=4?s=100" width="100px;" alt="zenjabba"/><br /><sub><b>zenjabba</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=zenjabba" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://quan.io"><img src="https://avatars.githubusercontent.com/u/3526705?v=4?s=100" width="100px;" alt="Dan Quan"/><br /><sub><b>Dan Quan</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=djquan" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/modem7"><img src="https://avatars.githubusercontent.com/u/4349962?v=4?s=100" width="100px;" alt="modem7"/><br /><sub><b>modem7</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=modem7" title="Documentation">📖</a></td>
     </tr>
     <tr>
-      <td align="center"><a href="https://github.com/hypnoglow"><img src="https://avatars.githubusercontent.com/u/4853075?v=4?s=100" width="100px;" alt="Igor Zibarev"/><br /><sub><b>Igor Zibarev</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=hypnoglow" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/patricegautier"><img src="https://avatars.githubusercontent.com/u/38435239?v=4?s=100" width="100px;" alt="Patrice"/><br /><sub><b>Patrice</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=patricegautier" title="Code">💻</a></td>
-      <td align="center"><a href="http://jamesw.link/me"><img src="https://avatars.githubusercontent.com/u/8067792?v=4?s=100" width="100px;" alt="James White"/><br /><sub><b>James White</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jamesmacwhite" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://ko-fi.com/foxite"><img src="https://avatars.githubusercontent.com/u/20421657?v=4?s=100" width="100px;" alt="Dirk Kok"/><br /><sub><b>Dirk Kok</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Foxite" title="Code">💻</a></td>
-      <td align="center"><a href="https://github.com/EDIflyer"><img src="https://avatars.githubusercontent.com/u/13610277?v=4?s=100" width="100px;" alt="EDIflyer"/><br /><sub><b>EDIflyer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=EDIflyer" title="Documentation">📖</a></td>
-      <td align="center"><a href="https://github.com/jauderho"><img src="https://avatars.githubusercontent.com/u/13562?v=4?s=100" width="100px;" alt="Jauder Ho"/><br /><sub><b>Jauder Ho</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jauderho" title="Code">💻</a></td>
-      <td align="center"><a href="https://tamal.vercel.app/"><img src="https://avatars.githubusercontent.com/u/72851613?v=4?s=100" width="100px;" alt="Tamal Das "/><br /><sub><b>Tamal Das </b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=IAmTamal" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/hypnoglow"><img src="https://avatars.githubusercontent.com/u/4853075?v=4?s=100" width="100px;" alt="Igor Zibarev"/><br /><sub><b>Igor Zibarev</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=hypnoglow" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/patricegautier"><img src="https://avatars.githubusercontent.com/u/38435239?v=4?s=100" width="100px;" alt="Patrice"/><br /><sub><b>Patrice</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=patricegautier" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://jamesw.link/me"><img src="https://avatars.githubusercontent.com/u/8067792?v=4?s=100" width="100px;" alt="James White"/><br /><sub><b>James White</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jamesmacwhite" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://ko-fi.com/foxite"><img src="https://avatars.githubusercontent.com/u/20421657?v=4?s=100" width="100px;" alt="Dirk Kok"/><br /><sub><b>Dirk Kok</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=Foxite" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/EDIflyer"><img src="https://avatars.githubusercontent.com/u/13610277?v=4?s=100" width="100px;" alt="EDIflyer"/><br /><sub><b>EDIflyer</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=EDIflyer" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/jauderho"><img src="https://avatars.githubusercontent.com/u/13562?v=4?s=100" width="100px;" alt="Jauder Ho"/><br /><sub><b>Jauder Ho</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=jauderho" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://tamal.vercel.app/"><img src="https://avatars.githubusercontent.com/u/72851613?v=4?s=100" width="100px;" alt="Tamal Das "/><br /><sub><b>Tamal Das </b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=IAmTamal" title="Documentation">📖</a></td>
+    </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/testwill"><img src="https://avatars.githubusercontent.com/u/8717479?v=4?s=100" width="100px;" alt="guangwu"/><br /><sub><b>guangwu</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=testwill" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://hub.lol"><img src="https://avatars.githubusercontent.com/u/48992448?v=4?s=100" width="100px;" alt="Florian Hübner"/><br /><sub><b>Florian Hübner</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=nothub" title="Documentation">📖</a> <a href="https://github.com/containrrr/watchtower/commits?author=nothub" title="Code">💻</a></td>
+      <td align="center"><a href="https://github.com/andriibratanin"><img src="https://avatars.githubusercontent.com/u/20169213?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Andrii Bratanin</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=andriibratanin" title="Documentation">📖</a></td>
     </tr>
   </tbody>
-  <tfoot>
-    
-  </tfoot>
 </table>
 
 <!-- markdownlint-restore -->

cmd/root.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"errors"
 	"math"
 	"net/http"
 	"os"
@@ -32,13 +33,16 @@ var (
 	scheduleSpec      string
 	cleanup           bool
 	noRestart         bool
+	noPull            bool
 	monitorOnly       bool
 	enableLabel       bool
+	disableContainers []string
 	notifier          t.Notifier
 	timeout           time.Duration
 	lifecycleHooks    bool
 	rollingRestart    bool
 	scope             string
+	labelPrecedence   bool
 )
 
 var rootCmd = NewRootCommand()
@@ -77,23 +81,8 @@ func Execute() {
 func PreRun(cmd *cobra.Command, _ []string) {
 	f := cmd.PersistentFlags()
 	flags.ProcessFlagAliases(f)
-
-	if enabled, _ := f.GetBool("no-color"); enabled {
-		log.SetFormatter(&log.TextFormatter{
-			DisableColors: true,
-		})
-	} else {
-		// enable logrus built-in support for https://bixense.com/clicolors/
-		log.SetFormatter(&log.TextFormatter{
-			EnvironmentOverrideColors: true,
-		})
-	}
-
-	rawLogLevel, _ := f.GetString(`log-level`)
-	if logLevel, err := log.ParseLevel(rawLogLevel); err != nil {
-		log.Fatalf("Invalid log level: %s", err.Error())
-	} else {
-		log.SetLevel(logLevel)
+	if err := flags.SetupLogging(f); err != nil {
+		log.Fatalf("Failed to initialize logging: %s", err.Error())
 	}
 
 	scheduleSpec, _ = f.GetString("schedule")
@@ -106,9 +95,11 @@ func PreRun(cmd *cobra.Command, _ []string) {
 	}
 
 	enableLabel, _ = f.GetBool("label-enable")
+	disableContainers, _ = f.GetStringSlice("disable-containers")
 	lifecycleHooks, _ = f.GetBool("enable-lifecycle-hooks")
 	rollingRestart, _ = f.GetBool("rolling-restart")
 	scope, _ = f.GetString("scope")
+	labelPrecedence, _ = f.GetBool("label-take-precedence")
 
 	if scope != "" {
 		log.Debugf(`Using scope %q`, scope)
@@ -120,7 +111,7 @@ func PreRun(cmd *cobra.Command, _ []string) {
 		log.Fatal(err)
 	}
 
-	noPull, _ := f.GetBool("no-pull")
+	noPull, _ = f.GetBool("no-pull")
 	includeStopped, _ := f.GetBool("include-stopped")
 	includeRestarting, _ := f.GetBool("include-restarting")
 	reviveStopped, _ := f.GetBool("revive-stopped")
@@ -132,7 +123,6 @@ func PreRun(cmd *cobra.Command, _ []string) {
 	}
 
 	client = container.NewClient(container.ClientOptions{
-		PullImages:        !noPull,
 		IncludeStopped:    includeStopped,
 		ReviveStopped:     reviveStopped,
 		RemoveVolumes:     removeVolumes,
@@ -146,12 +136,22 @@ func PreRun(cmd *cobra.Command, _ []string) {
 
 // Run is the main execution flow of the command
 func Run(c *cobra.Command, names []string) {
-	filter, filterDesc := filters.BuildFilter(names, enableLabel, scope)
+	filter, filterDesc := filters.BuildFilter(names, disableContainers, enableLabel, scope)
 	runOnce, _ := c.PersistentFlags().GetBool("run-once")
 	enableUpdateAPI, _ := c.PersistentFlags().GetBool("http-api-update")
 	enableMetricsAPI, _ := c.PersistentFlags().GetBool("http-api-metrics")
 	unblockHTTPAPI, _ := c.PersistentFlags().GetBool("http-api-periodic-polls")
 	apiToken, _ := c.PersistentFlags().GetString("http-api-token")
+	healthCheck, _ := c.PersistentFlags().GetBool("health-check")
+
+	if healthCheck {
+		// health check should not have pid 1
+		if os.Getpid() == 1 {
+			time.Sleep(1 * time.Second)
+			log.Fatal("The health check flag should never be passed to the main watchtower container process")
+		}
+		os.Exit(0)
+	}
 
 	if rollingRestart && monitorOnly {
 		log.Fatal("Rolling restarts is not compatible with the global monitor only flag")
@@ -182,9 +182,12 @@ func Run(c *cobra.Command, names []string) {
 	httpAPI := api.New(apiToken)
 
 	if enableUpdateAPI {
-		updateHandler := update.New(func(images []string) { runUpdatesWithNotifications(filters.FilterByImage(images, filter)) }, updateLock)
+		updateHandler := update.New(func(images []string) {
+			metric := runUpdatesWithNotifications(filters.FilterByImage(images, filter))
+			metrics.RegisterScan(metric)
+		}, updateLock)
 		httpAPI.RegisterFunc(updateHandler.Path, updateHandler.Handle)
-		// If polling isn't enabled the scheduler is never started and
+		// If polling isn't enabled the scheduler is never started, and
 		// we need to trigger the startup messages manually.
 		if !unblockHTTPAPI {
 			writeStartupMessage(c, time.Time{}, filterDesc)
@@ -196,7 +199,7 @@ func Run(c *cobra.Command, names []string) {
 		httpAPI.RegisterHandler(metricsHandler.Path, metricsHandler.Handle)
 	}
 
-	if err := httpAPI.Start(enableUpdateAPI && !unblockHTTPAPI); err != nil && err != http.ErrServerClosed {
+	if err := httpAPI.Start(enableUpdateAPI && !unblockHTTPAPI); err != nil && !errors.Is(err, http.ErrServerClosed) {
 		log.Error("failed to start API", err)
 	}
 
@@ -363,6 +366,8 @@ func runUpdatesWithNotifications(filter t.Filter) *metrics.Metric {
 		MonitorOnly:     monitorOnly,
 		LifecycleHooks:  lifecycleHooks,
 		RollingRestart:  rollingRestart,
+		LabelPrecedence: labelPrecedence,
+		NoPull:          noPull,
 	}
 	result, err := actions.Update(client, updateParams)
 	if err != nil {

dockerfiles/Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM alpine:3.16.2 as alpine
+FROM --platform=$BUILDPLATFORM alpine:3.19.0 as alpine
 
 RUN apk add --no-cache \
     ca-certificates \
@@ -17,4 +17,7 @@ COPY --from=alpine \
 EXPOSE 8080
 
 COPY watchtower /
+
+HEALTHCHECK CMD [ "/watchtower", "--health-check"]
+
 ENTRYPOINT ["/watchtower"]

dockerfiles/Dockerfile.dev-self-contained

@@ -7,6 +7,13 @@ FROM golang:alpine as builder
 # use version (for example "v0.3.3") or "main"
 ARG WATCHTOWER_VERSION=main
 
+# Pre download required modules to avoid redownloading at each build thanks to docker layer caching.
+# Copying go.mod and go.sum ensure to invalid the layer/build cache if there is a change in module requirement
+WORKDIR /watchtower
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
 RUN apk add --no-cache \
     alpine-sdk \
     ca-certificates \
@@ -35,4 +42,6 @@ COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certifi
 COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
 COPY --from=builder /watchtower/watchtower /watchtower
 
+HEALTHCHECK CMD [ "/watchtower", "--health-check"]
+
 ENTRYPOINT ["/watchtower"]

dockerfiles/Dockerfile.self-contained

@@ -35,4 +35,6 @@ COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certifi
 COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
 COPY --from=builder /go/watchtower/watchtower /watchtower
 
+HEALTHCHECK CMD [ "/watchtower", "--health-check"]
+
 ENTRYPOINT ["/watchtower"]

dockerfiles/container-networking/docker-compose.yml

@@ -0,0 +1,17 @@
+services:
+  producer:
+    image: qmcgaw/gluetun:v3.35.0
+    cap_add:
+      - NET_ADMIN
+    environment:
+      - VPN_SERVICE_PROVIDER=${VPN_SERVICE_PROVIDER}
+      - OPENVPN_USER=${OPENVPN_USER}
+      - OPENVPN_PASSWORD=${OPENVPN_PASSWORD}
+      - SERVER_COUNTRIES=${SERVER_COUNTRIES}
+  consumer:
+    depends_on:
+      - producer
+    image: nginx:1.25.1
+    network_mode: "service:producer"
+    labels:
+      - "com.centurylinklabs.watchtower.depends-on=/wt-contnet-producer-1"

docs/arguments.md

@@ -27,6 +27,33 @@ In the example above, watchtower will execute an upgrade attempt on the containe
 
 When no arguments are specified, watchtower will monitor all running containers.
 
+## Secrets/Files
+
+Some arguments can also reference a file, in which case the contents of the file are used as the value.
+This can be used to avoid putting secrets in the configuration file or command line.
+
+The following arguments are currently supported (including their corresponding `WATCHTOWER_` environment variables):
+ - `notification-url`
+ - `notification-email-server-password`
+ - `notification-slack-hook-url`
+ - `notification-msteams-hook`
+ - `notification-gotify-token`
+ - `http-api-token`
+
+### Example docker-compose usage
+```yaml
+secrets:
+  access_token:
+    file: access_token
+
+services:
+  watchtower:
+    secrets:
+      - access_token
+    environment:
+      - WATCHTOWER_HTTP_API_TOKEN=/run/secrets/access_token
+```
+
 ## Help
 Shows documentation about the supported flags.
 
@@ -58,8 +85,8 @@ Environment Variable: WATCHTOWER_CLEANUP
              Default: false
 ```
 
-## Remove attached volumes
-Removes attached volumes after updating. When this flag is specified, watchtower will remove all attached volumes from the container before restarting with a new image. Use this option to force new volumes to be populated as containers are updated.
+## Remove anonymous volumes
+Removes anonymous volumes after updating. When this flag is specified, watchtower will remove all anonymous volumes from the container before restarting with a new image. Named volumes will not be removed!
 
 ```text
             Argument: --remove-volumes
@@ -107,6 +134,17 @@ Environment Variable: WATCHTOWER_LOG_LEVEL
              Default: info
 ```
 
+## Logging format
+
+Sets what logging format to use for console output.
+
+```text
+            Argument: --log-format, -l
+Environment Variable: WATCHTOWER_LOG_FORMAT
+     Possible values: Auto, LogFmt, Pretty or JSON
+             Default: Auto
+```
+
 ## ANSI colors
 Disable ANSI color escape codes in log output.
 
@@ -151,7 +189,7 @@ Environment Variable: WATCHTOWER_INCLUDE_RESTARTING
 Will also include created and exited containers.
 
 ```text
-            Argument: --include-stopped
+            Argument: --include-stopped, -S
 Environment Variable: WATCHTOWER_INCLUDE_STOPPED
                 Type: Boolean
              Default: false
@@ -178,7 +216,7 @@ Environment Variable: WATCHTOWER_POLL_INTERVAL
 ```
 
 ## Filter by enable label
-Update containers that have a `com.centurylinklabs.watchtower.enable` label set to true.
+Monitor and update containers that have a `com.centurylinklabs.watchtower.enable` label set to true.
 
 ```text
             Argument: --label-enable
@@ -188,10 +226,23 @@ Environment Variable: WATCHTOWER_LABEL_ENABLE
 ```
 
 ## Filter by disable label
-__Do not__ update containers that have `com.centurylinklabs.watchtower.enable` label set to false and 
+__Do not__ Monitor and update containers that have `com.centurylinklabs.watchtower.enable` label set to false and 
 no `--label-enable` argument is passed. Note that only one or the other (targeting by enable label) can be 
 used at the same time to target containers.
 
+## Filter by disabling specific container names
+Monitor and update containers whose names are not in a given set of names.
+
+This can be used to exclude specific containers, when setting labels is not an option.
+The listed containers will be excluded even if they have the enable filter set to true.
+
+```text
+            Argument: --disable-containers, -x
+Environment Variable: WATCHTOWER_DISABLE_CONTAINERS
+                Type: Comma- or space-separated string list
+             Default: ""
+```
+
 ## Without updating containers
 Will only monitor for new images, send notifications and invoke
 the [pre-check/post-check hooks](https://containrrr.dev/watchtower/lifecycle-hooks/), but will __not__ update the
@@ -211,6 +262,19 @@ Environment Variable: WATCHTOWER_MONITOR_ONLY
 
 Note that monitor-only can also be specified on a per-container basis with the `com.centurylinklabs.watchtower.monitor-only` label set on those containers.
 
+See [With label taking precedence over arguments](#With-label-taking-precedence-over-arguments) for behavior when both argument and label are set
+
+## With label taking precedence over arguments
+
+By default, arguments will take precedence over labels. This means that if you set `WATCHTOWER_MONITOR_ONLY` to true or use `--monitor-only`, a container with `com.centurylinklabs.watchtower.monitor-only` set to false will not be updated. If you set `WATCHTOWER_LABEL_TAKE_PRECEDENCE` to true or use `--label-take-precedence`, then the container will also be updated. This also apply to the no pull option. if you set `WATCHTOWER_NO_PULL` to true or use `--no-pull`, a container with `com.centurylinklabs.watchtower.no-pull` set to false will not pull the new image. If you set `WATCHTOWER_LABEL_TAKE_PRECEDENCE` to true or use `--label-take-precedence`, then the container will pull image
+
+```text
+            Argument: --label-take-precedence
+Environment Variable: WATCHTOWER_LABEL_TAKE_PRECEDENCE
+                Type: Boolean
+             Default: false
+```
+
 ## Without restarting containers
 Do not restart containers after updating. This option can be useful when the start of the containers
 is managed by an external system such as systemd.
@@ -234,6 +298,11 @@ Environment Variable: WATCHTOWER_NO_PULL
              Default: false
 ```
 
+Note that no-pull can also be specified on a per-container basis with the
+`com.centurylinklabs.watchtower.no-pull` label set on those containers.
+
+See [With label taking precedence over arguments](#With-label-taking-precedence-over-arguments) for behavior when both argument and label are set
+
 ## Without sending a startup message
 Do not send a message after watchtower started. Otherwise there will be an info-level notification.
 
@@ -248,7 +317,7 @@ Environment Variable: WATCHTOWER_NO_STARTUP_MESSAGE
 Run an update attempt against a container name list one time immediately and exit.
 
 ```text
-            Argument: --run-once
+            Argument: --run-once, -R
 Environment Variable: WATCHTOWER_RUN_ONCE
                 Type: Boolean
              Default: false
@@ -267,6 +336,7 @@ Environment Variable: WATCHTOWER_HTTP_API_UPDATE
 
 ## HTTP API Token
 Sets an authentication token to HTTP API requests.
+Can also reference a file, in which case the contents of the file are used.
 
 ```text
             Argument: --http-api-token
@@ -289,6 +359,11 @@ Environment Variable: WATCHTOWER_HTTP_API_PERIODIC_POLLS
 Update containers that have a `com.centurylinklabs.watchtower.scope` label set with the same value as the given argument. 
 This enables [running multiple instances](https://containrrr.dev/watchtower/running-multiple-instances).
 
+!!! note "Filter by lack of scope"
+    If you want other instances of watchtower to ignore the scoped containers, set this argument to `none`.
+    When omitted, watchtower will update all containers regardless of scope.
+
+
 ```text
             Argument: --scope
 Environment Variable: WATCHTOWER_SCOPE
@@ -361,3 +436,32 @@ Environment Variable: WATCHTOWER_WARN_ON_HEAD_FAILURE
      Possible values: always, auto, never
              Default: auto
 ```
+
+## Health check
+
+Returns a success exit code to enable usage with docker `HEALTHCHECK`. This check is naive and only returns checks whether there is another process running inside the container, as it is the only known form of failure state for watchtowers container.
+
+!!! note "Only for HEALTHCHECK use"
+    Never put this on the main container executable command line as it is only meant to be run from docker HEALTHCHECK.
+
+```text
+            Argument: --health-check
+```
+
+## Programatic Output (porcelain)
+
+Writes the session results to STDOUT using a stable, machine-readable format (indicated by the argument VERSION).  
+  
+Alias for:
+
+```text
+		--notification-url logger://
+		--notification-log-stdout
+		--notification-report
+		--notification-template porcelain.VERSION.summary-no-log
+
+            Argument: --porcelain, -P
+Environment Variable: WATCHTOWER_PORCELAIN
+     Possible values: v1
+             Default: -
+```

docs/container-selection.md

@@ -58,6 +58,7 @@ If instead you want to [only include containers with the enable label](https://c
 If you wish to create a monitoring scope, you will need to [run multiple instances and set a scope for each of them](https://containrrr.github.io/watchtower/running-multiple-instances).
 
 Watchtower filters running containers by testing them against each configured criteria. A container is monitored if all criteria are met. For example:
+
 -   If a container's name is on the monitoring name list (not empty `--name` argument) but it is not enabled (_centurylinklabs.watchtower.enable=false_), it won't be monitored;
 -   If a container's name is not on the monitoring name list (not empty `--name` argument), even if it is enabled (_centurylinklabs.watchtower.enable=true_ and `--label-enable` flag is set), it won't be monitored;
 

docs/http-api-mode.md

@@ -35,3 +35,11 @@ Notice that there is an environment variable named WATCHTOWER_HTTP_API_TOKEN. To
 ```bash
 curl -H "Authorization: Bearer mytoken" localhost:8080/v1/update
 ```
+
+---
+
+In order to update only certain images, the image names can be provided as URL query parameters. The following `curl` command would trigger an update for the images `foo/bar` and `foo/baz`:
+
+```bash
+curl -H "Authorization: Bearer mytoken" localhost:8080/v1/update?image=foo/bar,foo/baz
+```

docs/introduction.md

@@ -11,5 +11,5 @@ CONTAINER ID   IMAGE                   STATUS          PORTS
 6cc4d2a9d1a5   containrrr/watchtower   Up 15 minutes                            watchtower
 ```
 
-Every few minutes watchtower will pull the latest _centurylink/wetty-cli_ image and compare it to the one that was used to run the "wetty" container. If it sees that the image has changed it will stop/remove the "wetty" container and then restart it using the new image and the same `docker run` options that were used to start the container initially (in this case, that would include the `-p 8080:3000` port mapping).
+Every day watchtower will pull the latest _centurylink/wetty-cli_ image and compare it to the one that was used to run the "wetty" container. If it sees that the image has changed it will stop/remove the "wetty" container and then restart it using the new image and the same `docker run` options that were used to start the container initially (in this case, that would include the `-p 8080:3000` port mapping).
 

docs/linked-containers.md

@@ -2,4 +2,6 @@ Watchtower will detect if there are links between any of the running containers
 
 For example, imagine you were running a _mysql_ container and a _wordpress_ container which had been linked to the _mysql_ container. If watchtower were to detect that the _mysql_ container required an update, it would first shut down the linked _wordpress_ container followed by the _mysql_ container. When restarting the containers it would handle _mysql_ first and then _wordpress_ to ensure that the link continued to work.
 
-If you want to override existing links you can use special `com.centurylinklabs.watchtower.depends-on` label with dependent container names, separated by a comma.
+If you want to override existing links, or if you are not using links, you can use special `com.centurylinklabs.watchtower.depends-on` label with dependent container names, separated by a comma.
+
+When you have a depending container that is using `network_mode: service:container` then watchtower will treat that container as an implicit link.

docs/metrics.md

@@ -4,7 +4,7 @@
 
 Metrics can be used to track how Watchtower behaves over time.
 
-To use this feature, you have to set an [API token](arguments.md#http-api-token) and [enable the metrics API](arguments.md#http-api-metrics),
+To use this feature, you have to set an [API token](arguments.md#http_api_token) and [enable the metrics API](arguments.md#http_api_metrics),
 as well as creating a port mapping for your container for port `8080`.
 
 The metrics API endpoint is `/v1/metrics`.

docs/notifications.md

@@ -18,19 +18,20 @@ system, [logrus](http://github.com/sirupsen/logrus).
 
 -   `--notifications-level` (env. `WATCHTOWER_NOTIFICATIONS_LEVEL`): Controls the log level which is used for the notifications. If omitted, the default log level is `info`. Possible values are: `panic`, `fatal`, `error`, `warn`, `info`, `debug` or `trace`.
 -   `--notifications-hostname` (env. `WATCHTOWER_NOTIFICATIONS_HOSTNAME`): Custom hostname specified in subject/title. Useful to override the operating system hostname.
--   `--notifications-delay` (env. `WATCHTOWER_NOTIFICATION_DELAY`): Delay before sending notifications expressed in seconds.
+-   `--notifications-delay` (env. `WATCHTOWER_NOTIFICATIONS_DELAY`): Delay before sending notifications expressed in seconds.
 -   Watchtower will post a notification every time it is started. This behavior [can be changed](https://containrrr.github.io/watchtower/arguments/#without_sending_a_startup_message) with an argument.
--   `notification-title-tag` (env. `WATCHTOWER_NOTIFICATION_TITLE_TAG`): Prefix to include in the title. Useful when running multiple watchtowers.
--   `notification-skip-title` (env. `WATCHTOWER_NOTIFICATION_SKIP_TITLE`): Do not pass the title param to notifications. This will not pass a dynamic title override to notification services. If no title is configured for the service, it will remove the title all together.
+-   `--notification-title-tag` (env. `WATCHTOWER_NOTIFICATION_TITLE_TAG`): Prefix to include in the title. Useful when running multiple watchtowers.
+-   `--notification-skip-title` (env. `WATCHTOWER_NOTIFICATION_SKIP_TITLE`): Do not pass the title param to notifications. This will not pass a dynamic title override to notification services. If no title is configured for the service, it will remove the title all together.
+-   `--notification-log-stdout` (env. `WATCHTOWER_NOTIFICATION_LOG_STDOUT`): Enable output from `logger://` shoutrrr service to stdout.
 
-## [shoutrrr](https://github.com/containrrr/shoutrrr) notifications
+## [Shoutrrr](https://github.com/containrrr/shoutrrr) notifications
 
 To send notifications via shoutrrr, the following command-line options, or their corresponding environment variables, can be set:
 
 -   `--notification-url` (env. `WATCHTOWER_NOTIFICATION_URL`): The shoutrrr service URL to be used.  This option can also reference a file, in which case the contents of the file are used.
 
 
-Go to [containrrr.dev/shoutrrr/v0.6/services/overview](https://containrrr.dev/shoutrrr/v0.6/services/overview) to
+Go to [containrrr.dev/shoutrrr/v0.8/services/overview](https://containrrr.dev/shoutrrr/v0.8/services/overview) to
 learn more about the different service URLs you can use. You can define multiple services by space separating the
 URLs. (See example below)
 
@@ -56,6 +57,10 @@ outputs timestamp and log level.
     custom format.  
     i.e., The day of the year has to be 1, the month has to be 2 (february), the hour 3 (or 15 for 24h time) etc.
 
+!!! note "Skipping notifications"
+    To skip sending notifications that do not contain any information, you can wrap your template with `{{if .}}` and `{{end}}`.
+
+
 Example:
 
 ```bash
@@ -110,7 +115,7 @@ Example using a custom report template that always sends a session report after
     docker run -d \
       --name watchtower \
       -v /var/run/docker.sock:/var/run/docker.sock \
-      -e WATCHTOWER_NOTIFICATION_REPORT="true"
+      -e WATCHTOWER_NOTIFICATION_REPORT="true" \
       -e WATCHTOWER_NOTIFICATION_URL="discord://token@channel slack://watchtower@token-a/token-b/token-c" \
       -e WATCHTOWER_NOTIFICATION_TEMPLATE="
       {{- if .Report -}}
@@ -130,7 +135,7 @@ Example using a custom report template that always sends a session report after
           {{- end -}}
         {{- end -}}
       {{- else -}}
-        {{range .Entries -}}{{.Message}}{{"\n"}}{{- end -}}
+        {{range .Entries -}}{{.Message}}{{\"\n\"}}{{- end -}}
       {{- end -}}
       " \
       containrrr/watchtower

docs/private-registries.md

@@ -23,19 +23,29 @@ password `auth` string:
 ```
 
 `<REGISTRY_NAME>` needs to be replaced by the name of your private registry
-(e.g., `my-private-registry.example.org`)
+(e.g., `my-private-registry.example.org`).
 
-!!! important "Using private images on docker hub"
-    When using private images on docker hub, the containers beeing watched needs to use the full image name, including the repository prefix `index.docker.io`.
-    So instead of
-    ```
-    docker run -d myuser/myimage
-    ```
-    you would run it as
-    ```
-    docker run -d index.docker.io/myuser/myimage
-    ```
+!!! info "Using private images on Docker Hub"
+    To access private repositories on Docker Hub,
+    `<REGISTRY_NAME>` should be `https://index.docker.io/v1/`.
+    In this special case, the registry domain does not have to be specified
+    in `docker run` or `docker-compose`. Like Docker, Watchtower will use the
+    Docker Hub registry and its credentials when no registry domain is specified.
     
+    <sub>Watchtower will recognize credentials with `<REGISTRY_NAME>` `index.docker.io`,
+    but the Docker CLI will not.</sub>
+
+!!! important "Using a private registry on a local host"
+    To use a private registry hosted locally, make sure to correctly specify the registry host
+    in both `config.json` and the `docker run` command or `docker-compose` file.
+    Valid hosts are `localhost[:PORT]`, `HOST:PORT`,
+    or any multi-part `domain.name` or IP-address with or without a port.
+    
+    Examples:
+    * `localhost` -> `localhost/myimage`
+    * `127.0.0.1` -> `127.0.0.1/myimage:mytag`
+    * `host.domain` -> `host.domain/myorganization/myimage`
+    * `other-lan-host:80` -> `other-lan-host:80/imagename:latest`
 
 The required `auth` string can be generated as follows:
 
@@ -75,7 +85,7 @@ When creating the watchtower container via docker-compose, use the following lin
 version: "3.4"
 services:
   watchtower:
-    image: index.docker.io/containrrr/watchtower:latest
+    image: containrrr/watchtower:latest
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       - <PATH_TO_HOME_DIR>/.docker/config.json:/config.json
@@ -114,7 +124,7 @@ in a volume that may be mounted onto your watchtower container.
 
 1.  Create the Dockerfile (contents below):
     ```Dockerfile
-    FROM golang:1.16
+    FROM golang:1.20
     
     ENV GO111MODULE off
     ENV CGO_ENABLED 0

docs/running-multiple-instances.md

@@ -1,10 +1,11 @@
 By default, Watchtower will clean up other instances and won't allow multiple instances running on the same Docker host or swarm. It is possible to override this behavior by defining a [scope](https://containrrr.github.io/watchtower/arguments/#filter_by_scope) to each running instance. 
 
-Notice that:
--   Multiple instances can't run with the same scope;
--   An instance without a scope will clean up other running instances, even if they have a defined scope;
+!!! note
+    - Multiple instances can't run with the same scope;
+    - An instance without a scope will clean up other running instances, even if they have a defined scope;
+    - Supplying `none` as the scope will treat `com.centurylinklabs.watchtower.scope=none`, `com.centurylinklabs.watchtower.scope=` and the lack of a `com.centurylinklabs.watchtower.scope` label as the scope `none`. This effectly enables you to run both scoped and unscoped watchtower instances on the same machine.
 
-To define an instance monitoring scope, use the `--scope` argument or the `WATCHTOWER_SCOPE` environment variable on startup and set the _com.centurylinklabs.watchtower.scope_ label with the same value for the containers you want to include in this instance's scope (including the instance itself).
+To define an instance monitoring scope, use the `--scope` argument or the `WATCHTOWER_SCOPE` environment variable on startup and set the `com.centurylinklabs.watchtower.scope` label with the same value for the containers you want to include in this instance's scope (including the instance itself).
 
 For example, in a Docker Compose config file:
 
@@ -12,16 +13,29 @@ For example, in a Docker Compose config file:
 version: '3'
 
 services:
-  app-monitored-by-watchtower:
+  app-with-scope:
     image: myapps/monitored-by-watchtower
-    labels:
-      - "com.centurylinklabs.watchtower.scope=myscope"
+    labels: [ "com.centurylinklabs.watchtower.scope=myscope" ]
 
-  watchtower:
+  scoped-watchtower:
     image: containrrr/watchtower
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
+    volumes: [ "/var/run/docker.sock:/var/run/docker.sock" ]
     command: --interval 30 --scope myscope
-    labels:
-      - "com.centurylinklabs.watchtower.scope=myscope"
+    labels: [ "com.centurylinklabs.watchtower.scope=myscope" ] 
+
+  unscoped-app-a:
+    image: myapps/app-a
+
+  unscoped-app-b:
+    image: myapps/app-b
+    labels: [ "com.centurylinklabs.watchtower.scope=none" ]
+    
+  unscoped-app-c:
+    image: myapps/app-b
+    labels: [ "com.centurylinklabs.watchtower.scope=" ]
+    
+  unscoped-watchtower:
+    image: containrrr/watchtower
+    volumes: [ "/var/run/docker.sock:/var/run/docker.sock" ]
+    command: --interval 30 --scope none
 ```

docs/stylesheets/theme.css

@@ -14,56 +14,56 @@
   --md-hue: 199;
 
   /* Primary and accent */
-  --md-primary-fg-color:             hsla(199deg  27%  35% 100%);
-  --md-primary-fg-color--link:       hsla(199deg  45%  65% 100%);
-  --md-primary-fg-color--light:      hsla(198deg  19%  73% 100%);
-  --md-primary-fg-color--dark:       hsla(194deg 100%  13% 100%);
-  --md-accent-fg-color:              hsla(194deg  45%  50% 100%);
-  --md-accent-fg-color--transparent: hsla(194deg  45%  50% 6.3%);
+  --md-primary-fg-color:             hsl(199deg  27%  35% / 100%);
+  --md-primary-fg-color--link:       hsl(199deg  45%  65% / 100%);
+  --md-primary-fg-color--light:      hsl(198deg  19%  73% / 100%);
+  --md-primary-fg-color--dark:       hsl(194deg 100%  13% / 100%);
+  --md-accent-fg-color:              hsl(194deg  45%  50% / 100%);
+  --md-accent-fg-color--transparent: hsl(194deg  45%  50% / 6.3%);
 
   /* Default */
-  --md-default-fg-color:             hsla(var(--md-hue)  75%  95% 100%);
-  --md-default-fg-color--light:      hsla(var(--md-hue)  75%  90%  62%);
-  --md-default-fg-color--lighter:    hsla(var(--md-hue)  75%  90%  32%);
-  --md-default-fg-color--lightest:   hsla(var(--md-hue)  75%  90%  12%);
-  --md-default-bg-color:             hsla(var(--md-hue)  15%  21% 100%);
-  --md-default-bg-color--light:      hsla(var(--md-hue)  15%  21%  54%);
-  --md-default-bg-color--lighter:    hsla(var(--md-hue)  15%  21%  26%);
-  --md-default-bg-color--lightest:   hsla(var(--md-hue)  15%  21%   7%);
+  --md-default-fg-color:             hsl(var(--md-hue)  75%  95%  / 100%);
+  --md-default-fg-color--light:      hsl(var(--md-hue)  75%  90%  /  62%);
+  --md-default-fg-color--lighter:    hsl(var(--md-hue)  75%  90%  /  32%);
+  --md-default-fg-color--lightest:   hsl(var(--md-hue)  75%  90%  /  12%);
+  --md-default-bg-color:             hsl(var(--md-hue)  15%  21%  / 100%);
+  --md-default-bg-color--light:      hsl(var(--md-hue)  15%  21%  /  54%);
+  --md-default-bg-color--lighter:    hsl(var(--md-hue)  15%  21%  /  26%);
+  --md-default-bg-color--lightest:   hsl(var(--md-hue)  15%  21%  /   7%);
 
   /* Code */
-  --md-code-fg-color:                hsla(var(--md-hue) 18% 86% 100%);
-  --md-code-bg-color:                hsla(var(--md-hue) 15% 15% 100%);
-  --md-code-hl-color:                hsla(218deg 100%  63%  15%);
-  --md-code-hl-number-color:         hsla(346deg  74%  63% 100%);
-  --md-code-hl-special-color:        hsla(320deg  83%  66% 100%);
-  --md-code-hl-function-color:       hsla(271deg  57%  65% 100%);
-  --md-code-hl-constant-color:       hsla(230deg  62%  70% 100%);
-  --md-code-hl-keyword-color:        hsla(199deg  33%  64% 100%);
-  --md-code-hl-string-color:         hsla( 50deg  34%  74% 100%);
+  --md-code-fg-color:                hsl(var(--md-hue) 18% 86%  / 100%);
+  --md-code-bg-color:                hsl(var(--md-hue) 15% 15%  / 100%);
+  --md-code-hl-color:                hsl(218deg 100%  63%  /  15%);
+  --md-code-hl-number-color:         hsl(346deg  74%  63%  / 100%);
+  --md-code-hl-special-color:        hsl(320deg  83%  66%  / 100%);
+  --md-code-hl-function-color:       hsl(271deg  57%  65%  / 100%);
+  --md-code-hl-constant-color:       hsl(230deg  62%  70%  / 100%);
+  --md-code-hl-keyword-color:        hsl(199deg  33%  64%  / 100%);
+  --md-code-hl-string-color:         hsl( 50deg  34%  74%  / 100%);
   --md-code-hl-name-color:           var(--md-code-fg-color);
   --md-code-hl-operator-color:       var(--md-default-fg-color--light);
   --md-code-hl-punctuation-color:    var(--md-default-fg-color--light);
   --md-code-hl-comment-color:        var(--md-default-fg-color--light);
   --md-code-hl-generic-color:        var(--md-default-fg-color--light);
-  --md-code-hl-variable-color:       hsla(241deg  22%  60% 100%);
+  --md-code-hl-variable-color:       hsl(241deg  22%  60%  / 100%);
 
   /* Typeset */
   --md-typeset-color:                var(--md-default-fg-color);
   --md-typeset-a-color:              var(--md-primary-fg-color--link);
-  --md-typeset-mark-color:           hsla(218deg 100%  63%  30%);
-  --md-typeset-kbd-color:            hsla(var(--md-hue)  15%  94%  12%);
-  --md-typeset-kbd-accent-color:     hsla(var(--md-hue)  15%  94%  20%);
-  --md-typeset-kbd-border-color:     hsla(var(--md-hue)  15%  14% 100%);
-  --md-typeset-table-color:          hsla(var(--md-hue)  75%  95%  12%);
+  --md-typeset-mark-color:           hsl(218deg 100%  63%  / 30%);
+  --md-typeset-kbd-color:            hsl(var(--md-hue)  15%  94%  /  12%);
+  --md-typeset-kbd-accent-color:     hsl(var(--md-hue)  15%  94%  /  20%);
+  --md-typeset-kbd-border-color:     hsl(var(--md-hue)  15%  14%  / 100%);
+  --md-typeset-table-color:          hsl(var(--md-hue)  75%  95%  /  12%);
 
   /* Admonition */
   --md-admonition-fg-color:          var(--md-default-fg-color);
   --md-admonition-bg-color:          var(--md-default-bg-color);
 
   /* Footer */
-  --md-footer-bg-color:              hsla(var(--md-hue)  15%  12%  87%);
-  --md-footer-bg-color--dark:        hsla(var(--md-hue)  15%  10% 100%);
+  --md-footer-bg-color:              hsl(var(--md-hue)  15%  12% /  87%);
+  --md-footer-bg-color--dark:        hsl(var(--md-hue)  15%  10% / 100%);
 
   /* Shadows */
   --md-shadow-z1:

docs/template-preview.md

@@ -0,0 +1,251 @@
+<style>
+    #tplprev {
+        margin: 0;
+        display: flex; 
+        flex-direction: column; 
+        row-gap: 1rem; 
+        box-sizing: border-box; 
+        position: relative; 
+        margin-right: -13.3rem
+    }
+    #tplprev textarea {
+        box-decoration-break: slice;
+        overflow: auto;
+        padding: 0.77em 1.18em;
+        scrollbar-color: var(--md-default-fg-color--lighter) transparent;
+        scrollbar-width: thin;
+        touch-action: auto;
+        word-break: normal;
+        height: 420px;
+        flex: 1;
+    }
+    #tplprev .controls {
+        display: flex; 
+        flex-direction: row; 
+        column-gap: 0.5rem
+    }
+    #tplprev textarea, #tplprev input {
+        background-color: var(--md-code-bg-color);
+        border-width: 0;
+        border-radius: 0.1rem;
+        color: var(--md-code-fg-color);
+        font-feature-settings: "kern";
+        font-family: var(--md-code-font-family);
+    }
+    .numfield {
+        font-size: .7rem;
+        display: flex;
+        flex-direction: column;
+        justify-content: space-between;
+    }
+    #tplprev button {
+        border-radius: 0.1rem;
+        color: var(--md-primary-bg-color);
+        background-color: var(--md-primary-fg-color);
+        flex:1; 
+        min-width: 12ch; 
+        padding: 0.5rem
+    }
+    #tplprev button:hover {
+        background-color: var(--md-accent-fg-color);
+    }
+    #tplprev input[type="number"] { width: 5ch; flex: 1; font-size: 1rem; }
+    #tplprev fieldset {
+        margin-top: -0.5rem;
+        display: flex;
+        flex: 1;
+        column-gap: 0.5rem;
+    }
+    #tplprev .template-wrapper {
+        display: flex; 
+        flex:1; 
+        column-gap: 1rem;
+    }
+    #tplprev .result-wrapper {
+        flex: 1; 
+        display: flex
+    }
+    #result {
+        font-size: 0.7rem;
+        background-color: var(--md-code-bg-color);
+        scrollbar-color: var(--md-default-fg-color--lighter) transparent;
+        scrollbar-width: thin;
+        touch-action: auto;
+        overflow: auto;
+        padding: 0.77em 1.18em;
+        margin:0;
+        height: 540px;
+        flex:1; 
+        width:100%
+    }
+    #result b {color: var(--md-code-hl-special-color)}
+    #result i {color: var(--md-code-hl-keyword-color)}
+    #tplprev .loading {
+        position: absolute; 
+        inset: 0; 
+        display: flex; 
+        padding: 1rem; 
+        box-sizing: border-box; 
+        background: var(--md-code-bg-color); 
+        margin-top: 0
+    }
+</style>
+<script src="../assets/wasm_exec.js"></script>
+<script>
+    let wasmLoaded = false;
+    const updatePreview = () => {
+        if (!wasmLoaded) return;
+        const form = document.querySelector('#tplprev');
+        const input = form.template.value;
+        console.log('Input: %o', input);
+        const arrFromCount = (key) => Array.from(Array(form[key]?.valueAsNumber ?? 0), () => key);
+        const states = form.report.value === "yes" ? [
+            ...arrFromCount("skipped"),
+            ...arrFromCount("scanned"),
+            ...arrFromCount("updated"),
+            ...arrFromCount("failed" ),
+            ...arrFromCount("fresh"  ),
+            ...arrFromCount("stale"  ),
+        ] : [];
+        console.log("States: %o", states);
+        const levels = form.log.value === "yes" ? [
+            ...arrFromCount("error"),
+            ...arrFromCount("warning"),
+            ...arrFromCount("info"),
+            ...arrFromCount("debug"),
+        ] : [];
+        console.log("Levels: %o", levels);
+        const output = WATCHTOWER.tplprev(input, states, levels);
+        console.log('Output: \n%o', output);
+        if (output.startsWith('Error: ')) {
+            document.querySelector('#result').innerHTML = `<b>Error</b>: ${output.substring(7)}`;
+        } else if (output.length) {
+            document.querySelector('#result').innerText = output;
+        } else {
+            document.querySelector('#result').innerHTML = '<i>empty (would not be sent as a notification)</i>';
+        }
+    }
+    const formSubmitted = (e) => {
+        //e.preventDefault();
+        //updatePreview();
+    }
+    let debounce;
+    const inputUpdated = () => {
+        if(debounce) clearTimeout(debounce);
+        debounce = setTimeout(() => updatePreview(), 400);
+    }
+    const formChanged = (e) =>  {
+        console.log('form changed: %o', e);
+        const targetToggle = e.target.dataset['toggle'];
+        if (targetToggle) {
+            e.target.form[targetToggle].value = e.target.checked ? "yes" : "no";
+        }
+        updatePreview()
+    }
+    const go = new Go();
+    WebAssembly.instantiateStreaming(fetch("../assets/tplprev.wasm"), go.importObject).then((result) => {
+        go.run(result.instance);
+        document.querySelector('#tplprev .loading').style.display = "none";
+        wasmLoaded = true;
+        updatePreview();
+    });
+</script>
+<form id="tplprev" onchange="formChanged(event)" onsubmit="formSubmitted(event)">
+<pre class="loading">loading wasm...</pre>
+<div class="template-wrapper">
+<textarea name="template" type="text" onkeyup="inputUpdated()">{{- with .Report -}}
+  {{- if ( or .Updated .Failed ) -}}
+{{len .Scanned}} Scanned, {{len .Updated}} Updated, {{len .Failed}} Failed
+    {{- range .Updated}}
+- {{.Name}} ({{.ImageName}}): {{.CurrentImageID.ShortID}} updated to {{.LatestImageID.ShortID}}
+    {{- end -}}
+    {{- range .Fresh}}
+- {{.Name}} ({{.ImageName}}): {{.State}}
+    {{- end -}}
+    {{- range .Skipped}}
+- {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
+    {{- end -}}
+    {{- range .Failed}}
+- {{.Name}} ({{.ImageName}}): {{.State}}: {{.Error}}
+      {{- end -}}
+  {{- end -}}
+{{- end -}}
+{{- if (and .Entries .Report) }}
+
+Logs:
+{{ end -}}
+{{range .Entries -}}{{.Time.Format "2006-01-02T15:04:05Z07:00"}} [{{.Level}}] {{.Message}}{{"\n"}}{{- end -}}</textarea>
+</div>
+<div class="controls">
+<fieldset>
+    <input type="hidden" name="report" value="yes" />
+    <legend><label><input type="checkbox" data-toggle="report" checked /> Container report</label></legend>
+    <label class="numfield">
+        Skipped:
+        <input type="number" name="skipped" value="3" />
+    </label>
+    <label class="numfield">
+        Scanned:
+        <input type="number" name="scanned" value="3" />
+    </label>
+    <label class="numfield">
+        Updated:
+        <input type="number" name="updated" value="3" />
+    </label>
+    <label class="numfield">
+        Failed:
+        <input type="number" name="failed" value="3" />
+    </label>
+    <label class="numfield">
+        Fresh:
+        <input type="number" name="fresh" value="3" />
+    </label>
+    <label class="numfield">
+        Stale:
+        <input type="number" name="stale" value="3" />
+    </label>
+</fieldset>
+<fieldset>
+    <input type="hidden" name="log" value="yes" />
+    <legend><label><input type="checkbox" data-toggle="log" checked /> Log entries</label></legend>
+    <label class="numfield">
+        Error: 
+        <input type="number" name="error" value="1" />
+    </label>
+    <label class="numfield">
+        Warning:
+        <input type="number" name="warning" value="2" />
+    </label>
+    <label class="numfield">
+        Info:
+        <input type="number" name="info" value="3" />
+    </label>
+    <label class="numfield">
+        Debug:
+        <input type="number" name="debug" value="4" />
+    </label>
+</fieldset>
+<button type="submit">Update preview</button>
+</div>
+<div style="result-wrapper">
+    <pre id="result"></pre>
+</div>
+</form>
+<script>
+const loadQueryVals = () => {
+    const form = document.querySelector('#tplprev');
+    const params =  new URLSearchParams(location.search);
+    for(const [key, value] of params){
+        form[key].value = value;
+        const toggleInput = form.querySelector(`[data-toggle="${key}"]`);
+        if (toggleInput) {
+            toggleInput.checked = value === "yes";
+        }
+    }
+}
+if (document.readyState === "loading") {
+    document.addEventListener("DOMContentLoaded", loadQueryVals());
+} else {
+    loadQueryVals();
+}
+</script>

docs/usage-overview.md

@@ -48,14 +48,14 @@ docker run -d \
 
 If you mount the config file as described above, be sure to also prepend the URL for the registry when starting up your
 watched image (you can omit the https://). Here is a complete docker-compose.yml file that starts up a docker container
-from a private repo at Docker Hub and monitors it with watchtower. Note the command argument changing the interval to
-30s rather than the default 24 hours.
+from a private repo on the GitHub Registry and monitors it with watchtower. Note the command argument changing the interval
+to 30s rather than the default 24 hours.
 
 ```yaml
 version: "3"
 services:
   cavo:
-    image: index.docker.io/<org>/<image>:<tag>
+    image: ghcr.io/<org>/<image>:<tag>
     ports:
       - "443:3443"
       - "80:3080"

go.mod

@@ -1,69 +1,74 @@
 module github.com/containrrr/watchtower
 
-go 1.18
+go 1.20
 
 require (
-	github.com/containrrr/shoutrrr v0.6.1
-	github.com/docker/cli v20.10.21+incompatible
-	github.com/docker/distribution v2.8.1+incompatible
-	github.com/docker/docker v20.10.21+incompatible
+	github.com/containrrr/shoutrrr v0.8.0
+	github.com/distribution/reference v0.5.0
+	github.com/docker/cli v24.0.7+incompatible
+	github.com/docker/docker v24.0.7+incompatible
 	github.com/docker/go-connections v0.4.0
 	github.com/onsi/ginkgo v1.16.5
-	github.com/onsi/gomega v1.23.0
-	github.com/prometheus/client_golang v1.13.0
-	github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967
-	github.com/sirupsen/logrus v1.9.0
-	github.com/spf13/cobra v1.6.0
+	github.com/onsi/gomega v1.30.0
+	github.com/prometheus/client_golang v1.18.0
+	github.com/robfig/cron v1.2.0
+	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.13.0
-	github.com/stretchr/testify v1.8.1
-	golang.org/x/net v0.1.0
+	github.com/spf13/viper v1.18.2
+	github.com/stretchr/testify v1.8.4
+	golang.org/x/net v0.19.0
 )
 
+require github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+
 require (
 	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
 	github.com/Microsoft/go-winio v0.4.17 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/docker/distribution v2.8.3+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.6.1 // indirect
 	github.com/docker/go-units v0.4.0 // indirect
-	github.com/fatih/color v1.13.0 // indirect
-	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/fatih/color v1.15.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/inconshreveable/mousetrap v1.0.1 // indirect
-	github.com/magiconair/properties v1.8.6 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 // indirect
 	github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c // indirect
 	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.0.2 // indirect
-	github.com/pelletier/go-toml v1.9.5 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
-	github.com/spf13/afero v1.8.2 // indirect
-	github.com/spf13/cast v1.5.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
 	github.com/stretchr/objx v0.5.0 // indirect
-	github.com/subosito/gotenv v1.4.1 // indirect
-	golang.org/x/sys v0.1.0 // indirect
-	golang.org/x/text v0.4.0
-	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0
+	golang.org/x/time v0.5.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	gotest.tools/v3 v3.0.3 // indirect
 )

go.sum

@@ -1,763 +1,240 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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internal/actions/actions_suite_test.go

@@ -1,12 +1,13 @@
 package actions_test
 
 import (
-	"github.com/sirupsen/logrus"
 	"testing"
 	"time"
 
+	"github.com/sirupsen/logrus"
+
 	"github.com/containrrr/watchtower/internal/actions"
-	"github.com/containrrr/watchtower/pkg/container"
+	"github.com/containrrr/watchtower/pkg/types"
 
 	. "github.com/containrrr/watchtower/internal/actions/mocks"
 	. "github.com/onsi/ginkgo"
@@ -37,7 +38,7 @@ var _ = Describe("the actions package", func() {
 			It("should not do anything", func() {
 				client := CreateMockClient(
 					&TestData{
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainer(
 								"test-container",
 								"test-container",
@@ -59,7 +60,7 @@ var _ = Describe("the actions package", func() {
 				client = CreateMockClient(
 					&TestData{
 						NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainer(
 								"test-container-01",
 								"test-container-01",
@@ -89,7 +90,7 @@ var _ = Describe("the actions package", func() {
 			BeforeEach(func() {
 				client = CreateMockClient(
 					&TestData{
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainer(
 								"test-container-01",
 								"test-container-01",

internal/actions/check.go

@@ -2,16 +2,15 @@ package actions
 
 import (
 	"fmt"
-	"github.com/containrrr/watchtower/pkg/types"
 	"sort"
 	"time"
 
+	"github.com/containrrr/watchtower/pkg/container"
 	"github.com/containrrr/watchtower/pkg/filters"
 	"github.com/containrrr/watchtower/pkg/sorter"
+	"github.com/containrrr/watchtower/pkg/types"
 
 	log "github.com/sirupsen/logrus"
-
-	"github.com/containrrr/watchtower/pkg/container"
 )
 
 // CheckForSanity makes sure everything is sane before starting
@@ -40,7 +39,11 @@ func CheckForSanity(client container.Client, filter types.Filter, rollingRestart
 // will stop and remove all but the most recently started container. This behaviour can be bypassed
 // if a scope UID is defined.
 func CheckForMultipleWatchtowerInstances(client container.Client, cleanup bool, scope string) error {
-	containers, err := client.ListContainers(filters.FilterByScope(scope, filters.WatchtowerContainersFilter))
+	filter := filters.WatchtowerContainersFilter
+	if scope != "" {
+		filter = filters.FilterByScope(scope, filter)
+	}
+	containers, err := client.ListContainers(filter)
 
 	if err != nil {
 		return err
@@ -55,7 +58,7 @@ func CheckForMultipleWatchtowerInstances(client container.Client, cleanup bool,
 	return cleanupExcessWatchtowers(containers, client, cleanup)
 }
 
-func cleanupExcessWatchtowers(containers []container.Container, client container.Client, cleanup bool) error {
+func cleanupExcessWatchtowers(containers []types.Container, client container.Client, cleanup bool) error {
 	var stopErrors int
 
 	sort.Sort(sorter.ByCreated(containers))

internal/actions/mocks/client.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/containrrr/watchtower/pkg/container"
-
 	t "github.com/containrrr/watchtower/pkg/types"
 )
 
@@ -21,7 +19,7 @@ type MockClient struct {
 type TestData struct {
 	TriedToRemoveImageCount int
 	NameOfContainerToKeep   string
-	Containers              []container.Container
+	Containers              []t.Container
 	Staleness               map[string]bool
 }
 
@@ -40,12 +38,12 @@ func CreateMockClient(data *TestData, pullImages bool, removeVolumes bool) MockC
 }
 
 // ListContainers is a mock method returning the provided container testdata
-func (client MockClient) ListContainers(_ t.Filter) ([]container.Container, error) {
+func (client MockClient) ListContainers(_ t.Filter) ([]t.Container, error) {
 	return client.TestData.Containers, nil
 }
 
 // StopContainer is a mock method
-func (client MockClient) StopContainer(c container.Container, _ time.Duration) error {
+func (client MockClient) StopContainer(c t.Container, _ time.Duration) error {
 	if c.Name() == client.TestData.NameOfContainerToKeep {
 		return errors.New("tried to stop the instance we want to keep")
 	}
@@ -53,12 +51,12 @@ func (client MockClient) StopContainer(c container.Container, _ time.Duration) e
 }
 
 // StartContainer is a mock method
-func (client MockClient) StartContainer(_ container.Container) (t.ContainerID, error) {
+func (client MockClient) StartContainer(_ t.Container) (t.ContainerID, error) {
 	return "", nil
 }
 
 // RenameContainer is a mock method
-func (client MockClient) RenameContainer(_ container.Container, _ string) error {
+func (client MockClient) RenameContainer(_ t.Container, _ string) error {
 	return nil
 }
 
@@ -69,7 +67,7 @@ func (client MockClient) RemoveImageByID(_ t.ImageID) error {
 }
 
 // GetContainer is a mock method
-func (client MockClient) GetContainer(_ t.ContainerID) (container.Container, error) {
+func (client MockClient) GetContainer(_ t.ContainerID) (t.Container, error) {
 	return client.TestData.Containers[0], nil
 }
 
@@ -88,7 +86,7 @@ func (client MockClient) ExecuteCommand(_ t.ContainerID, command string, _ int)
 }
 
 // IsContainerStale is true if not explicitly stated in TestData for the mock client
-func (client MockClient) IsContainerStale(cont container.Container) (bool, t.ImageID, error) {
+func (client MockClient) IsContainerStale(cont t.Container, params t.UpdateParams) (bool, t.ImageID, error) {
 	stale, found := client.TestData.Staleness[cont.Name()]
 	if !found {
 		stale = true
@@ -97,6 +95,6 @@ func (client MockClient) IsContainerStale(cont container.Container) (bool, t.Ima
 }
 
 // WarnOnHeadPullFailed is always true for the mock client
-func (client MockClient) WarnOnHeadPullFailed(_ container.Container) bool {
+func (client MockClient) WarnOnHeadPullFailed(_ t.Container) bool {
 	return true
 }

internal/actions/mocks/container.go

@@ -14,7 +14,7 @@ import (
 )
 
 // CreateMockContainer creates a container substitute valid for testing
-func CreateMockContainer(id string, name string, image string, created time.Time) container.Container {
+func CreateMockContainer(id string, name string, image string, created time.Time) wt.Container {
 	content := types.ContainerJSON{
 		ContainerJSONBase: &types.ContainerJSONBase{
 			ID:      id,
@@ -31,7 +31,7 @@ func CreateMockContainer(id string, name string, image string, created time.Time
 			ExposedPorts: map[nat.Port]struct{}{},
 		},
 	}
-	return *container.NewContainer(
+	return container.NewContainer(
 		&content,
 		CreateMockImageInfo(image),
 	)
@@ -48,12 +48,12 @@ func CreateMockImageInfo(image string) *types.ImageInspect {
 }
 
 // CreateMockContainerWithImageInfo should only be used for testing
-func CreateMockContainerWithImageInfo(id string, name string, image string, created time.Time, imageInfo types.ImageInspect) container.Container {
+func CreateMockContainerWithImageInfo(id string, name string, image string, created time.Time, imageInfo types.ImageInspect) wt.Container {
 	return CreateMockContainerWithImageInfoP(id, name, image, created, &imageInfo)
 }
 
 // CreateMockContainerWithImageInfoP should only be used for testing
-func CreateMockContainerWithImageInfoP(id string, name string, image string, created time.Time, imageInfo *types.ImageInspect) container.Container {
+func CreateMockContainerWithImageInfoP(id string, name string, image string, created time.Time, imageInfo *types.ImageInspect) wt.Container {
 	content := types.ContainerJSON{
 		ContainerJSONBase: &types.ContainerJSONBase{
 			ID:      id,
@@ -66,21 +66,21 @@ func CreateMockContainerWithImageInfoP(id string, name string, image string, cre
 			Labels: make(map[string]string),
 		},
 	}
-	return *container.NewContainer(
+	return container.NewContainer(
 		&content,
 		imageInfo,
 	)
 }
 
 // CreateMockContainerWithDigest should only be used for testing
-func CreateMockContainerWithDigest(id string, name string, image string, created time.Time, digest string) container.Container {
+func CreateMockContainerWithDigest(id string, name string, image string, created time.Time, digest string) wt.Container {
 	c := CreateMockContainer(id, name, image, created)
 	c.ImageInfo().RepoDigests = []string{digest}
 	return c
 }
 
 // CreateMockContainerWithConfig creates a container substitute valid for testing
-func CreateMockContainerWithConfig(id string, name string, image string, running bool, restarting bool, created time.Time, config *dockerContainer.Config) container.Container {
+func CreateMockContainerWithConfig(id string, name string, image string, running bool, restarting bool, created time.Time, config *dockerContainer.Config) wt.Container {
 	content := types.ContainerJSON{
 		ContainerJSONBase: &types.ContainerJSONBase{
 			ID:    id,
@@ -97,14 +97,14 @@ func CreateMockContainerWithConfig(id string, name string, image string, running
 		},
 		Config: config,
 	}
-	return *container.NewContainer(
+	return container.NewContainer(
 		&content,
 		CreateMockImageInfo(image),
 	)
 }
 
 // CreateContainerForProgress creates a container substitute for tracking session/update progress
-func CreateContainerForProgress(index int, idPrefix int, nameFormat string) (container.Container, wt.ImageID) {
+func CreateContainerForProgress(index int, idPrefix int, nameFormat string) (wt.Container, wt.ImageID) {
 	indexStr := strconv.Itoa(idPrefix + index)
 	mockID := indexStr + strings.Repeat("0", 61-len(indexStr))
 	contID := "c79" + mockID
@@ -120,7 +120,7 @@ func CreateContainerForProgress(index int, idPrefix int, nameFormat string) (con
 }
 
 // CreateMockContainerWithLinks should only be used for testing
-func CreateMockContainerWithLinks(id string, name string, image string, created time.Time, links []string, imageInfo *types.ImageInspect) container.Container {
+func CreateMockContainerWithLinks(id string, name string, image string, created time.Time, links []string, imageInfo *types.ImageInspect) wt.Container {
 	content := types.ContainerJSON{
 		ContainerJSONBase: &types.ContainerJSONBase{
 			ID:      id,
@@ -136,7 +136,7 @@ func CreateMockContainerWithLinks(id string, name string, image string, created
 			Labels: make(map[string]string),
 		},
 	}
-	return *container.NewContainer(
+	return container.NewContainer(
 		&content,
 		imageInfo,
 	)

internal/actions/update.go

@@ -2,7 +2,6 @@ package actions
 
 import (
 	"errors"
-	"strings"
 
 	"github.com/containrrr/watchtower/internal/util"
 	"github.com/containrrr/watchtower/pkg/container"
@@ -34,8 +33,8 @@ func Update(client container.Client, params types.UpdateParams) (types.Report, e
 	staleCheckFailed := 0
 
 	for i, targetContainer := range containers {
-		stale, newestImage, err := client.IsContainerStale(targetContainer)
-		shouldUpdate := stale && !params.NoRestart && !params.MonitorOnly && !targetContainer.IsMonitorOnly()
+		stale, newestImage, err := client.IsContainerStale(targetContainer, params)
+		shouldUpdate := stale && !params.NoRestart && !targetContainer.IsMonitorOnly(params)
 		if err == nil && shouldUpdate {
 			// Check to make sure we have all the necessary information for recreating the container
 			err = targetContainer.VerifyConfiguration()
@@ -58,7 +57,7 @@ func Update(client container.Client, params types.UpdateParams) (types.Report, e
 		} else {
 			progress.AddScanned(targetContainer, newestImage)
 		}
-		containers[i].Stale = stale
+		containers[i].SetStale(stale)
 
 		if stale {
 			staleCount++
@@ -72,15 +71,13 @@ func Update(client container.Client, params types.UpdateParams) (types.Report, e
 
 	UpdateImplicitRestart(containers)
 
-	var containersToUpdate []container.Container
-	if !params.MonitorOnly {
+	var containersToUpdate []types.Container
 	for _, c := range containers {
-			if !c.IsMonitorOnly() {
+		if !c.IsMonitorOnly(params) {
 			containersToUpdate = append(containersToUpdate, c)
 			progress.MarkForUpdate(c.ID())
 		}
 	}
-	}
 
 	if params.RollingRestart {
 		progress.UpdateFailed(performRollingRestart(containersToUpdate, client, params))
@@ -97,7 +94,7 @@ func Update(client container.Client, params types.UpdateParams) (types.Report, e
 	return progress.Report(), nil
 }
 
-func performRollingRestart(containers []container.Container, client container.Client, params types.UpdateParams) map[types.ContainerID]error {
+func performRollingRestart(containers []types.Container, client container.Client, params types.UpdateParams) map[types.ContainerID]error {
 	cleanupImageIDs := make(map[types.ImageID]bool, len(containers))
 	failed := make(map[types.ContainerID]error, len(containers))
 
@@ -109,7 +106,7 @@ func performRollingRestart(containers []container.Container, client container.Cl
 			} else {
 				if err := restartStaleContainer(containers[i], client, params); err != nil {
 					failed[containers[i].ID()] = err
-				} else if containers[i].Stale {
+				} else if containers[i].IsStale() {
 					// Only add (previously) stale containers' images to cleanup
 					cleanupImageIDs[containers[i].ImageID()] = true
 				}
@@ -123,7 +120,7 @@ func performRollingRestart(containers []container.Container, client container.Cl
 	return failed
 }
 
-func stopContainersInReversedOrder(containers []container.Container, client container.Client, params types.UpdateParams) (failed map[types.ContainerID]error, stopped map[types.ImageID]bool) {
+func stopContainersInReversedOrder(containers []types.Container, client container.Client, params types.UpdateParams) (failed map[types.ContainerID]error, stopped map[types.ImageID]bool) {
 	failed = make(map[types.ContainerID]error, len(containers))
 	stopped = make(map[types.ImageID]bool, len(containers))
 	for i := len(containers) - 1; i >= 0; i-- {
@@ -138,7 +135,7 @@ func stopContainersInReversedOrder(containers []container.Container, client cont
 	return
 }
 
-func stopStaleContainer(container container.Container, client container.Client, params types.UpdateParams) error {
+func stopStaleContainer(container types.Container, client container.Client, params types.UpdateParams) error {
 	if container.IsWatchtower() {
 		log.Debugf("This is the watchtower container %s", container.Name())
 		return nil
@@ -149,7 +146,7 @@ func stopStaleContainer(container container.Container, client container.Client,
 	}
 
 	// Perform an additional check here to prevent us from stopping a linked container we cannot restart
-	if container.LinkedToRestarting {
+	if container.IsLinkedToRestarting() {
 		if err := container.VerifyConfiguration(); err != nil {
 			return err
 		}
@@ -175,7 +172,7 @@ func stopStaleContainer(container container.Container, client container.Client,
 	return nil
 }
 
-func restartContainersInSortedOrder(containers []container.Container, client container.Client, params types.UpdateParams, stoppedImages map[types.ImageID]bool) map[types.ContainerID]error {
+func restartContainersInSortedOrder(containers []types.Container, client container.Client, params types.UpdateParams, stoppedImages map[types.ImageID]bool) map[types.ContainerID]error {
 	cleanupImageIDs := make(map[types.ImageID]bool, len(containers))
 	failed := make(map[types.ContainerID]error, len(containers))
 
@@ -186,7 +183,7 @@ func restartContainersInSortedOrder(containers []container.Container, client con
 		if stoppedImages[c.SafeImageID()] {
 			if err := restartStaleContainer(c, client, params); err != nil {
 				failed[c.ID()] = err
-			} else if c.Stale {
+			} else if c.IsStale() {
 				// Only add (previously) stale containers' images to cleanup
 				cleanupImageIDs[c.ImageID()] = true
 			}
@@ -211,7 +208,7 @@ func cleanupImages(client container.Client, imageIDs map[types.ImageID]bool) {
 	}
 }
 
-func restartStaleContainer(container container.Container, client container.Client, params types.UpdateParams) error {
+func restartStaleContainer(container types.Container, client container.Client, params types.UpdateParams) error {
 	// Since we can't shutdown a watchtower container immediately, we need to
 	// start the new one while the old one is still running. This prevents us
 	// from re-using the same container name so we first rename the current
@@ -236,7 +233,7 @@ func restartStaleContainer(container container.Container, client container.Clien
 
 // UpdateImplicitRestart iterates through the passed containers, setting the
 // `LinkedToRestarting` flag if any of it's linked containers are marked for restart
-func UpdateImplicitRestart(containers []container.Container) {
+func UpdateImplicitRestart(containers []types.Container) {
 
 	for ci, c := range containers {
 		if c.ToRestart() {
@@ -250,7 +247,7 @@ func UpdateImplicitRestart(containers []container.Container) {
 				"linked":     c.Name(),
 			}).Debug("container is linked to restarting")
 			// NOTE: To mutate the array, the `c` variable cannot be used as it's a copy
-			containers[ci].LinkedToRestarting = true
+			containers[ci].SetLinkedToRestarting(true)
 		}
 
 	}
@@ -258,12 +255,8 @@ func UpdateImplicitRestart(containers []container.Container) {
 
 // linkedContainerMarkedForRestart returns the name of the first link that matches a
 // container marked for restart
-func linkedContainerMarkedForRestart(links []string, containers []container.Container) string {
+func linkedContainerMarkedForRestart(links []string, containers []types.Container) string {
 	for _, linkName := range links {
-		// Since the container names need to start with '/', let's prepend it if it's missing
-		if !strings.HasPrefix(linkName, "/") {
-			linkName = "/" + linkName
-		}
 		for _, candidate := range containers {
 			if candidate.Name() == linkName && candidate.ToRestart() {
 				return linkName

internal/actions/update_test.go

@@ -4,7 +4,6 @@ import (
 	"time"
 
 	"github.com/containrrr/watchtower/internal/actions"
-	"github.com/containrrr/watchtower/pkg/container"
 	"github.com/containrrr/watchtower/pkg/types"
 	dockerTypes "github.com/docker/docker/api/types"
 	dockerContainer "github.com/docker/docker/api/types/container"
@@ -18,7 +17,7 @@ import (
 func getCommonTestData(keepContainer string) *TestData {
 	return &TestData{
 		NameOfContainerToKeep: keepContainer,
-		Containers: []container.Container{
+		Containers: []types.Container{
 			CreateMockContainer(
 				"test-container-01",
 				"test-container-01",
@@ -59,7 +58,7 @@ func getLinkedTestData(withImageInfo bool) *TestData {
 
 	return &TestData{
 		Staleness: map[string]bool{linkingContainer.Name(): false},
-		Containers: []container.Container{
+		Containers: []types.Container{
 			staleContainer,
 			linkingContainer,
 		},
@@ -130,7 +129,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainer(
 								"test-container-01",
 								"test-container-01",
@@ -163,7 +162,7 @@ var _ = Describe("the update action", func() {
 			It("should not update any containers", func() {
 				client := CreateMockClient(
 					&TestData{
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainer(
 								"test-container-01",
 								"test-container-01",
@@ -179,13 +178,85 @@ var _ = Describe("the update action", func() {
 					false,
 					false,
 				)
-				_, err := actions.Update(client, types.UpdateParams{MonitorOnly: true})
+				_, err := actions.Update(client, types.UpdateParams{Cleanup: true, MonitorOnly: true})
 				Expect(err).NotTo(HaveOccurred())
 				Expect(client.TestData.TriedToRemoveImageCount).To(Equal(0))
 			})
+			When("watchtower has been instructed to have label take precedence", func() {
+				It("it should update containers when monitor only is set to false", func() {
+					client := CreateMockClient(
+						&TestData{
+							//NameOfContainerToKeep: "test-container-02",
+							Containers: []types.Container{
+								CreateMockContainerWithConfig(
+									"test-container-02",
+									"test-container-02",
+									"fake-image2:latest",
+									false,
+									false,
+									time.Now(),
+									&dockerContainer.Config{
+										Labels: map[string]string{
+											"com.centurylinklabs.watchtower.monitor-only": "false",
+										},
+									}),
+							},
+						},
+						false,
+						false,
+					)
+					_, err := actions.Update(client, types.UpdateParams{Cleanup: true, MonitorOnly: true, LabelPrecedence: true})
+					Expect(err).NotTo(HaveOccurred())
+					Expect(client.TestData.TriedToRemoveImageCount).To(Equal(1))
+				})
+				It("it should update not containers when monitor only is set to true", func() {
+					client := CreateMockClient(
+						&TestData{
+							//NameOfContainerToKeep: "test-container-02",
+							Containers: []types.Container{
+								CreateMockContainerWithConfig(
+									"test-container-02",
+									"test-container-02",
+									"fake-image2:latest",
+									false,
+									false,
+									time.Now(),
+									&dockerContainer.Config{
+										Labels: map[string]string{
+											"com.centurylinklabs.watchtower.monitor-only": "true",
+										},
+									}),
+							},
+						},
+						false,
+						false,
+					)
+					_, err := actions.Update(client, types.UpdateParams{Cleanup: true, MonitorOnly: true, LabelPrecedence: true})
+					Expect(err).NotTo(HaveOccurred())
+					Expect(client.TestData.TriedToRemoveImageCount).To(Equal(0))
+				})
+				It("it should update not containers when monitor only is not set", func() {
+					client := CreateMockClient(
+						&TestData{
+							Containers: []types.Container{
+								CreateMockContainer(
+									"test-container-01",
+									"test-container-01",
+									"fake-image:latest",
+									time.Now()),
+							},
+						},
+						false,
+						false,
+					)
+					_, err := actions.Update(client, types.UpdateParams{Cleanup: true, MonitorOnly: true, LabelPrecedence: true})
+					Expect(err).NotTo(HaveOccurred())
+					Expect(client.TestData.TriedToRemoveImageCount).To(Equal(0))
 				})
 
 			})
+		})
+	})
 
 	When("watchtower has been instructed to run lifecycle hooks", func() {
 
@@ -194,7 +265,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						//NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainerWithConfig(
 								"test-container-02",
 								"test-container-02",
@@ -227,7 +298,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						//NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainerWithConfig(
 								"test-container-02",
 								"test-container-02",
@@ -259,7 +330,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						//NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainerWithConfig(
 								"test-container-02",
 								"test-container-02",
@@ -300,7 +371,7 @@ var _ = Describe("the update action", func() {
 						ExposedPorts: map[nat.Port]struct{}{},
 					})
 
-				provider.Stale = true
+				provider.SetStale(true)
 
 				consumer := CreateMockContainerWithConfig(
 					"test-container-consumer",
@@ -316,7 +387,7 @@ var _ = Describe("the update action", func() {
 						ExposedPorts: map[nat.Port]struct{}{},
 					})
 
-				containers := []container.Container{
+				containers := []types.Container{
 					provider,
 					consumer,
 				}
@@ -338,7 +409,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						//NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainerWithConfig(
 								"test-container-02",
 								"test-container-02",
@@ -370,7 +441,7 @@ var _ = Describe("the update action", func() {
 				client := CreateMockClient(
 					&TestData{
 						//NameOfContainerToKeep: "test-container-02",
-						Containers: []container.Container{
+						Containers: []types.Container{
 							CreateMockContainerWithConfig(
 								"test-container-02",
 								"test-container-02",

internal/flags/flags.go

@@ -4,8 +4,8 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
+	"regexp"
 	"strings"
 	"time"
 
@@ -24,9 +24,9 @@ var defaultInterval = int((time.Hour * 24).Seconds())
 // RegisterDockerFlags that are used directly by the docker api client
 func RegisterDockerFlags(rootCmd *cobra.Command) {
 	flags := rootCmd.PersistentFlags()
-	flags.StringP("host", "H", viper.GetString("DOCKER_HOST"), "daemon socket to connect to")
-	flags.BoolP("tlsverify", "v", viper.GetBool("DOCKER_TLS_VERIFY"), "use TLS and verify the remote")
-	flags.StringP("api-version", "a", viper.GetString("DOCKER_API_VERSION"), "api version to use by docker client")
+	flags.StringP("host", "H", envString("DOCKER_HOST"), "daemon socket to connect to")
+	flags.BoolP("tlsverify", "v", envBool("DOCKER_TLS_VERIFY"), "use TLS and verify the remote")
+	flags.StringP("api-version", "a", envString("DOCKER_API_VERSION"), "api version to use by docker client")
 }
 
 // RegisterSystemFlags that are used by watchtower to modify the program flow
@@ -35,132 +35,145 @@ func RegisterSystemFlags(rootCmd *cobra.Command) {
 	flags.IntP(
 		"interval",
 		"i",
-		viper.GetInt("WATCHTOWER_POLL_INTERVAL"),
+		envInt("WATCHTOWER_POLL_INTERVAL"),
 		"Poll interval (in seconds)")
 
 	flags.StringP(
 		"schedule",
 		"s",
-		viper.GetString("WATCHTOWER_SCHEDULE"),
+		envString("WATCHTOWER_SCHEDULE"),
 		"The cron expression which defines when to update")
 
 	flags.DurationP(
 		"stop-timeout",
 		"t",
-		viper.GetDuration("WATCHTOWER_TIMEOUT"),
+		envDuration("WATCHTOWER_TIMEOUT"),
 		"Timeout before a container is forcefully stopped")
 
 	flags.BoolP(
 		"no-pull",
 		"",
-		viper.GetBool("WATCHTOWER_NO_PULL"),
+		envBool("WATCHTOWER_NO_PULL"),
 		"Do not pull any new images")
 
 	flags.BoolP(
 		"no-restart",
 		"",
-		viper.GetBool("WATCHTOWER_NO_RESTART"),
+		envBool("WATCHTOWER_NO_RESTART"),
 		"Do not restart any containers")
 
 	flags.BoolP(
 		"no-startup-message",
 		"",
-		viper.GetBool("WATCHTOWER_NO_STARTUP_MESSAGE"),
+		envBool("WATCHTOWER_NO_STARTUP_MESSAGE"),
 		"Prevents watchtower from sending a startup message")
 
 	flags.BoolP(
 		"cleanup",
 		"c",
-		viper.GetBool("WATCHTOWER_CLEANUP"),
+		envBool("WATCHTOWER_CLEANUP"),
 		"Remove previously used images after updating")
 
 	flags.BoolP(
 		"remove-volumes",
 		"",
-		viper.GetBool("WATCHTOWER_REMOVE_VOLUMES"),
+		envBool("WATCHTOWER_REMOVE_VOLUMES"),
 		"Remove attached volumes before updating")
 
 	flags.BoolP(
 		"label-enable",
 		"e",
-		viper.GetBool("WATCHTOWER_LABEL_ENABLE"),
+		envBool("WATCHTOWER_LABEL_ENABLE"),
 		"Watch containers where the com.centurylinklabs.watchtower.enable label is true")
 
+	flags.StringSliceP(
+		"disable-containers",
+		"x",
+		// Due to issue spf13/viper#380, can't use viper.GetStringSlice:
+		regexp.MustCompile("[, ]+").Split(envString("WATCHTOWER_DISABLE_CONTAINERS"), -1),
+		"Comma-separated list of containers to explicitly exclude from watching.")
+
+	flags.StringP(
+		"log-format",
+		"l",
+		viper.GetString("WATCHTOWER_LOG_FORMAT"),
+		"Sets what logging format to use for console output. Possible values: Auto, LogFmt, Pretty, JSON")
+
 	flags.BoolP(
 		"debug",
 		"d",
-		viper.GetBool("WATCHTOWER_DEBUG"),
+		envBool("WATCHTOWER_DEBUG"),
 		"Enable debug mode with verbose logging")
 
 	flags.BoolP(
 		"trace",
 		"",
-		viper.GetBool("WATCHTOWER_TRACE"),
+		envBool("WATCHTOWER_TRACE"),
 		"Enable trace mode with very verbose logging - caution, exposes credentials")
 
 	flags.BoolP(
 		"monitor-only",
 		"m",
-		viper.GetBool("WATCHTOWER_MONITOR_ONLY"),
+		envBool("WATCHTOWER_MONITOR_ONLY"),
 		"Will only monitor for new images, not update the containers")
 
 	flags.BoolP(
 		"run-once",
 		"R",
-		viper.GetBool("WATCHTOWER_RUN_ONCE"),
+		envBool("WATCHTOWER_RUN_ONCE"),
 		"Run once now and exit")
 
 	flags.BoolP(
 		"include-restarting",
 		"",
-		viper.GetBool("WATCHTOWER_INCLUDE_RESTARTING"),
+		envBool("WATCHTOWER_INCLUDE_RESTARTING"),
 		"Will also include restarting containers")
 
 	flags.BoolP(
 		"include-stopped",
 		"S",
-		viper.GetBool("WATCHTOWER_INCLUDE_STOPPED"),
+		envBool("WATCHTOWER_INCLUDE_STOPPED"),
 		"Will also include created and exited containers")
 
 	flags.BoolP(
 		"revive-stopped",
 		"",
-		viper.GetBool("WATCHTOWER_REVIVE_STOPPED"),
+		envBool("WATCHTOWER_REVIVE_STOPPED"),
 		"Will also start stopped containers that were updated, if include-stopped is active")
 
 	flags.BoolP(
 		"enable-lifecycle-hooks",
 		"",
-		viper.GetBool("WATCHTOWER_LIFECYCLE_HOOKS"),
+		envBool("WATCHTOWER_LIFECYCLE_HOOKS"),
 		"Enable the execution of commands triggered by pre- and post-update lifecycle hooks")
 
 	flags.BoolP(
 		"rolling-restart",
 		"",
-		viper.GetBool("WATCHTOWER_ROLLING_RESTART"),
+		envBool("WATCHTOWER_ROLLING_RESTART"),
 		"Restart containers one at a time")
 
 	flags.BoolP(
 		"http-api-update",
 		"",
-		viper.GetBool("WATCHTOWER_HTTP_API_UPDATE"),
+		envBool("WATCHTOWER_HTTP_API_UPDATE"),
 		"Runs Watchtower in HTTP API mode, so that image updates must to be triggered by a request")
 	flags.BoolP(
 		"http-api-metrics",
 		"",
-		viper.GetBool("WATCHTOWER_HTTP_API_METRICS"),
+		envBool("WATCHTOWER_HTTP_API_METRICS"),
 		"Runs Watchtower with the Prometheus metrics API enabled")
 
 	flags.StringP(
 		"http-api-token",
 		"",
-		viper.GetString("WATCHTOWER_HTTP_API_TOKEN"),
+		envString("WATCHTOWER_HTTP_API_TOKEN"),
 		"Sets an authentication token to HTTP API requests.")
 
 	flags.BoolP(
 		"http-api-periodic-polls",
 		"",
-		viper.GetBool("WATCHTOWER_HTTP_API_PERIODIC_POLLS"),
+		envBool("WATCHTOWER_HTTP_API_PERIODIC_POLLS"),
 		"Also run periodic updates (specified with --interval and --schedule) if HTTP API is enabled")
 
 	// https://no-color.org/
@@ -173,19 +186,31 @@ func RegisterSystemFlags(rootCmd *cobra.Command) {
 	flags.StringP(
 		"scope",
 		"",
-		viper.GetString("WATCHTOWER_SCOPE"),
+		envString("WATCHTOWER_SCOPE"),
 		"Defines a monitoring scope for the Watchtower instance.")
 
 	flags.StringP(
 		"porcelain",
 		"P",
-		viper.GetString("WATCHTOWER_PORCELAIN"),
+		envString("WATCHTOWER_PORCELAIN"),
 		`Write session results to stdout using a stable versioned format. Supported values: "v1"`)
 
 	flags.String(
 		"log-level",
-		viper.GetString("WATCHTOWER_LOG_LEVEL"),
+		envString("WATCHTOWER_LOG_LEVEL"),
 		"The maximum log level that will be written to STDERR. Possible values: panic, fatal, error, warn, info, debug or trace")
+
+	flags.BoolP(
+		"health-check",
+		"",
+		false,
+		"Do health check and exit")
+
+	flags.BoolP(
+		"label-take-precedence",
+		"",
+		envBool("WATCHTOWER_LABEL_TAKE_PRECEDENCE"),
+		"Label applied to containers take precedence over arguments")
 }
 
 // RegisterNotificationFlags that are used by watchtower to send notifications
@@ -195,177 +220,202 @@ func RegisterNotificationFlags(rootCmd *cobra.Command) {
 	flags.StringSliceP(
 		"notifications",
 		"n",
-		viper.GetStringSlice("WATCHTOWER_NOTIFICATIONS"),
+		envStringSlice("WATCHTOWER_NOTIFICATIONS"),
 		" Notification types to send (valid: email, slack, msteams, gotify, shoutrrr)")
 
 	flags.String(
 		"notifications-level",
-		viper.GetString("WATCHTOWER_NOTIFICATIONS_LEVEL"),
+		envString("WATCHTOWER_NOTIFICATIONS_LEVEL"),
 		"The log level used for sending notifications. Possible values: panic, fatal, error, warn, info or debug")
 
 	flags.IntP(
 		"notifications-delay",
 		"",
-		viper.GetInt("WATCHTOWER_NOTIFICATIONS_DELAY"),
+		envInt("WATCHTOWER_NOTIFICATIONS_DELAY"),
 		"Delay before sending notifications, expressed in seconds")
 
 	flags.StringP(
 		"notifications-hostname",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATIONS_HOSTNAME"),
+		envString("WATCHTOWER_NOTIFICATIONS_HOSTNAME"),
 		"Custom hostname for notification titles")
 
 	flags.StringP(
 		"notification-email-from",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_FROM"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_FROM"),
 		"Address to send notification emails from")
 
 	flags.StringP(
 		"notification-email-to",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_TO"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_TO"),
 		"Address to send notification emails to")
 
 	flags.IntP(
 		"notification-email-delay",
 		"",
-		viper.GetInt("WATCHTOWER_NOTIFICATION_EMAIL_DELAY"),
+		envInt("WATCHTOWER_NOTIFICATION_EMAIL_DELAY"),
 		"Delay before sending notifications, expressed in seconds")
 
 	flags.StringP(
 		"notification-email-server",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER"),
 		"SMTP server to send notification emails through")
 
 	flags.IntP(
 		"notification-email-server-port",
 		"",
-		viper.GetInt("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT"),
+		envInt("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT"),
 		"SMTP server port to send notification emails through")
 
 	flags.BoolP(
 		"notification-email-server-tls-skip-verify",
 		"",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY"),
+		envBool("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY"),
 		`Controls whether watchtower verifies the SMTP server's certificate chain and host name.
 Should only be used for testing.`)
 
 	flags.StringP(
 		"notification-email-server-user",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER"),
 		"SMTP server user for sending notifications")
 
 	flags.StringP(
 		"notification-email-server-password",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD"),
 		"SMTP server password for sending notifications")
 
 	flags.StringP(
 		"notification-email-subjecttag",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG"),
+		envString("WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG"),
 		"Subject prefix tag for notifications via mail")
 
 	flags.StringP(
 		"notification-slack-hook-url",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL"),
+		envString("WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL"),
 		"The Slack Hook URL to send notifications to")
 
 	flags.StringP(
 		"notification-slack-identifier",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER"),
+		envString("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER"),
 		"A string which will be used to identify the messages coming from this watchtower instance")
 
 	flags.StringP(
 		"notification-slack-channel",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_CHANNEL"),
+		envString("WATCHTOWER_NOTIFICATION_SLACK_CHANNEL"),
 		"A string which overrides the webhook's default channel. Example: #my-custom-channel")
 
 	flags.StringP(
 		"notification-slack-icon-emoji",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI"),
+		envString("WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI"),
 		"An emoji code string to use in place of the default icon")
 
 	flags.StringP(
 		"notification-slack-icon-url",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_URL"),
+		envString("WATCHTOWER_NOTIFICATION_SLACK_ICON_URL"),
 		"An icon image URL string to use in place of the default icon")
 
 	flags.StringP(
 		"notification-msteams-hook",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL"),
+		envString("WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL"),
 		"The MSTeams WebHook URL to send notifications to")
 
 	flags.BoolP(
 		"notification-msteams-data",
 		"",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA"),
+		envBool("WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA"),
 		"The MSTeams notifier will try to extract log entry fields as MSTeams message facts")
 
 	flags.StringP(
 		"notification-gotify-url",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_GOTIFY_URL"),
+		envString("WATCHTOWER_NOTIFICATION_GOTIFY_URL"),
 		"The Gotify URL to send notifications to")
 
 	flags.StringP(
 		"notification-gotify-token",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_GOTIFY_TOKEN"),
+		envString("WATCHTOWER_NOTIFICATION_GOTIFY_TOKEN"),
 		"The Gotify Application required to query the Gotify API")
 
 	flags.BoolP(
 		"notification-gotify-tls-skip-verify",
 		"",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_GOTIFY_TLS_SKIP_VERIFY"),
+		envBool("WATCHTOWER_NOTIFICATION_GOTIFY_TLS_SKIP_VERIFY"),
 		`Controls whether watchtower verifies the Gotify server's certificate chain and host name.
 Should only be used for testing.`)
 
 	flags.String(
 		"notification-template",
-		viper.GetString("WATCHTOWER_NOTIFICATION_TEMPLATE"),
+		envString("WATCHTOWER_NOTIFICATION_TEMPLATE"),
 		"The shoutrrr text/template for the messages")
 
 	flags.StringArray(
 		"notification-url",
-		viper.GetStringSlice("WATCHTOWER_NOTIFICATION_URL"),
+		envStringSlice("WATCHTOWER_NOTIFICATION_URL"),
 		"The shoutrrr URL to send notifications to")
 
 	flags.Bool("notification-report",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_REPORT"),
+		envBool("WATCHTOWER_NOTIFICATION_REPORT"),
 		"Use the session report as the notification template data")
 
 	flags.StringP(
 		"notification-title-tag",
 		"",
-		viper.GetString("WATCHTOWER_NOTIFICATION_TITLE_TAG"),
+		envString("WATCHTOWER_NOTIFICATION_TITLE_TAG"),
 		"Title prefix tag for notifications")
 
 	flags.Bool("notification-skip-title",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_SKIP_TITLE"),
+		envBool("WATCHTOWER_NOTIFICATION_SKIP_TITLE"),
 		"Do not pass the title param to notifications")
 
 	flags.String(
 		"warn-on-head-failure",
-		viper.GetString("WATCHTOWER_WARN_ON_HEAD_FAILURE"),
+		envString("WATCHTOWER_WARN_ON_HEAD_FAILURE"),
 		"When to warn about HEAD pull requests failing. Possible values: always, auto or never")
 
 	flags.Bool(
 		"notification-log-stdout",
-		viper.GetBool("WATCHTOWER_NOTIFICATION_LOG_STDOUT"),
+		envBool("WATCHTOWER_NOTIFICATION_LOG_STDOUT"),
 		"Write notification logs to stdout instead of logging (to stderr)")
 }
 
+func envString(key string) string {
+	viper.MustBindEnv(key)
+	return viper.GetString(key)
+}
+
+func envStringSlice(key string) []string {
+	viper.MustBindEnv(key)
+	return viper.GetStringSlice(key)
+}
+
+func envInt(key string) int {
+	viper.MustBindEnv(key)
+	return viper.GetInt(key)
+}
+
+func envBool(key string) bool {
+	viper.MustBindEnv(key)
+	return viper.GetBool(key)
+}
+
+func envDuration(key string) time.Duration {
+	viper.MustBindEnv(key)
+	return viper.GetDuration(key)
+}
+
 // SetDefaults provides default values for environment variables
 func SetDefaults() {
 	viper.AutomaticEnv()
@@ -379,6 +429,7 @@ func SetDefaults() {
 	viper.SetDefault("WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG", "")
 	viper.SetDefault("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER", "watchtower")
 	viper.SetDefault("WATCHTOWER_LOG_LEVEL", "info")
+	viper.SetDefault("WATCHTOWER_LOG_FORMAT", "auto")
 }
 
 // EnvConfig translates the command-line options into environment variables
@@ -467,14 +518,17 @@ func GetSecretsFromFiles(rootCmd *cobra.Command) {
 		"notification-msteams-hook",
 		"notification-gotify-token",
 		"notification-url",
+		"http-api-token",
 	}
 	for _, secret := range secrets {
-		getSecretFromFile(flags, secret)
+		if err := getSecretFromFile(flags, secret); err != nil {
+			log.Fatalf("failed to get secret from flag %v: %s", secret, err)
+		}
 	}
 }
 
 // getSecretFromFile will check if the flag contains a reference to a file; if it does, replaces the value of the flag with the contents of the file.
-func getSecretFromFile(flags *pflag.FlagSet, secret string) {
+func getSecretFromFile(flags *pflag.FlagSet, secret string) error {
 	flag := flags.Lookup(secret)
 	if sliceValue, ok := flag.Value.(pflag.SliceValue); ok {
 		oldValues := sliceValue.GetSlice()
@@ -483,7 +537,7 @@ func getSecretFromFile(flags *pflag.FlagSet, secret string) {
 			if value != "" && isFile(value) {
 				file, err := os.Open(value)
 				if err != nil {
-					log.Fatal(err)
+					return err
 				}
 				scanner := bufio.NewScanner(file)
 				for scanner.Scan() {
@@ -493,25 +547,26 @@ func getSecretFromFile(flags *pflag.FlagSet, secret string) {
 					}
 					values = append(values, line)
 				}
+				if err := file.Close(); err != nil {
+					return err
+				}
 			} else {
 				values = append(values, value)
 			}
 		}
-		sliceValue.Replace(values)
-		return
+		return sliceValue.Replace(values)
 	}
 
 	value := flag.Value.String()
 	if value != "" && isFile(value) {
-		file, err := ioutil.ReadFile(value)
+		content, err := os.ReadFile(value)
 		if err != nil {
-			log.Fatal(err)
-		}
-		err = flags.Set(secret, strings.TrimSpace(string(file)))
-		if err != nil {
-			log.Error(err)
+			return err
 		}
+		return flags.Set(secret, strings.TrimSpace(string(content)))
 	}
+
+	return nil
 }
 
 func isFile(s string) bool {
@@ -564,19 +619,59 @@ func ProcessFlagAliases(flags *pflag.FlagSet) {
 	// update schedule flag to match interval if it's set, or to the default if none of them are
 	if intervalChanged || !scheduleChanged {
 		interval, _ := flags.GetInt(`interval`)
-		flags.Set(`schedule`, fmt.Sprintf(`@every %ds`, interval))
+		_ = flags.Set(`schedule`, fmt.Sprintf(`@every %ds`, interval))
 	}
 
 	if flagIsEnabled(flags, `debug`) {
-		flags.Set(`log-level`, `debug`)
+		_ = flags.Set(`log-level`, `debug`)
 	}
 
 	if flagIsEnabled(flags, `trace`) {
-		flags.Set(`log-level`, `trace`)
+		_ = flags.Set(`log-level`, `trace`)
 	}
 
 }
 
+// SetupLogging reads only the flags that is needed to set up logging and applies them to the global logger
+func SetupLogging(f *pflag.FlagSet) error {
+	logFormat, _ := f.GetString(`log-format`)
+	noColor, _ := f.GetBool("no-color")
+
+	switch strings.ToLower(logFormat) {
+	case "auto":
+		// This will either use the "pretty" or "logfmt" format, based on whether the standard out is connected to a TTY
+		log.SetFormatter(&log.TextFormatter{
+			DisableColors: noColor,
+			// enable logrus built-in support for https://bixense.com/clicolors/
+			EnvironmentOverrideColors: true,
+		})
+	case "json":
+		log.SetFormatter(&log.JSONFormatter{})
+	case "logfmt":
+		log.SetFormatter(&log.TextFormatter{
+			DisableColors: true,
+			FullTimestamp: true,
+		})
+	case "pretty":
+		log.SetFormatter(&log.TextFormatter{
+			// "Pretty" format combined with `--no-color` will only change the timestamp to the time since start
+			ForceColors:   !noColor,
+			FullTimestamp: false,
+		})
+	default:
+		return fmt.Errorf("invalid log format: %s", logFormat)
+	}
+
+	rawLogLevel, _ := f.GetString(`log-level`)
+	if logLevel, err := log.ParseLevel(rawLogLevel); err != nil {
+		return fmt.Errorf("invalid log level: %e", err)
+	} else {
+		log.SetLevel(logLevel)
+	}
+
+	return nil
+}
+
 func flagIsEnabled(flags *pflag.FlagSet, name string) bool {
 	value, err := flags.GetBool(name)
 	if err != nil {
@@ -593,7 +688,7 @@ func appendFlagValue(flags *pflag.FlagSet, name string, values ...string) error
 
 	if flagValues, ok := flag.Value.(pflag.SliceValue); ok {
 		for _, value := range values {
-			flagValues.Append(value)
+			_ = flagValues.Append(value)
 		}
 	} else {
 		return fmt.Errorf(`the value for flag %q is not a slice value`, name)

internal/flags/flags_test.go

@@ -1,20 +1,22 @@
 package flags
 
 import (
-	"io/ioutil"
 	"os"
+	"strings"
 	"testing"
 
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
 func TestEnvConfig_Defaults(t *testing.T) {
 	// Unset testing environments own variables, since those are not what is under test
-	os.Unsetenv("DOCKER_TLS_VERIFY")
-	os.Unsetenv("DOCKER_HOST")
+	_ = os.Unsetenv("DOCKER_TLS_VERIFY")
+	_ = os.Unsetenv("DOCKER_HOST")
 
 	cmd := new(cobra.Command)
 	SetDefaults()
@@ -48,10 +50,7 @@ func TestEnvConfig_Custom(t *testing.T) {
 
 func TestGetSecretsFromFilesWithString(t *testing.T) {
 	value := "supersecretstring"
-
-	err := os.Setenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD", value)
-	require.NoError(t, err)
-	defer os.Unsetenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD")
+	t.Setenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD", value)
 
 	testGetSecretsFromFiles(t, "notification-email-server-password", value)
 }
@@ -60,18 +59,15 @@ func TestGetSecretsFromFilesWithFile(t *testing.T) {
 	value := "megasecretstring"
 
 	// Create the temporary file which will contain a secret.
-	file, err := ioutil.TempFile(os.TempDir(), "watchtower-")
+	file, err := os.CreateTemp(t.TempDir(), "watchtower-")
 	require.NoError(t, err)
-	defer os.Remove(file.Name()) // Make sure to remove the temporary file later.
 
 	// Write the secret to the temporary file.
-	secret := []byte(value)
-	_, err = file.Write(secret)
+	_, err = file.Write([]byte(value))
 	require.NoError(t, err)
+	require.NoError(t, file.Close())
 
-	err = os.Setenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD", file.Name())
-	require.NoError(t, err)
-	defer os.Unsetenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD")
+	t.Setenv("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD", file.Name())
 
 	testGetSecretsFromFiles(t, "notification-email-server-password", value)
 }
@@ -80,16 +76,15 @@ func TestGetSliceSecretsFromFiles(t *testing.T) {
 	values := []string{"entry2", "", "entry3"}
 
 	// Create the temporary file which will contain a secret.
-	file, err := ioutil.TempFile(os.TempDir(), "watchtower-")
+	file, err := os.CreateTemp(t.TempDir(), "watchtower-")
 	require.NoError(t, err)
-	defer os.Remove(file.Name()) // Make sure to remove the temporary file later.
 
 	// Write the secret to the temporary file.
 	for _, value := range values {
 		_, err = file.WriteString("\n" + value)
 		require.NoError(t, err)
 	}
-	file.Close()
+	require.NoError(t, file.Close())
 
 	testGetSecretsFromFiles(t, "notification-url", `[entry1,entry2,entry3]`,
 		`--notification-url`, "entry1",
@@ -99,6 +94,7 @@ func TestGetSliceSecretsFromFiles(t *testing.T) {
 func testGetSecretsFromFiles(t *testing.T, flagName string, expected string, args ...string) {
 	cmd := new(cobra.Command)
 	SetDefaults()
+	RegisterSystemFlags(cmd)
 	RegisterNotificationFlags(cmd)
 	require.NoError(t, cmd.ParseFlags(args))
 	GetSecretsFromFiles(cmd)
@@ -166,9 +162,7 @@ func TestProcessFlagAliases(t *testing.T) {
 
 func TestProcessFlagAliasesLogLevelFromEnvironment(t *testing.T) {
 	cmd := new(cobra.Command)
-	err := os.Setenv("WATCHTOWER_DEBUG", `true`)
-	require.NoError(t, err)
-	defer os.Unsetenv("WATCHTOWER_DEBUG")
+	t.Setenv("WATCHTOWER_DEBUG", `true`)
 
 	SetDefaults()
 	RegisterDockerFlags(cmd)
@@ -183,6 +177,57 @@ func TestProcessFlagAliasesLogLevelFromEnvironment(t *testing.T) {
 	assert.Equal(t, `debug`, logLevel)
 }
 
+func TestLogFormatFlag(t *testing.T) {
+	cmd := new(cobra.Command)
+
+	SetDefaults()
+	RegisterDockerFlags(cmd)
+	RegisterSystemFlags(cmd)
+
+	// Ensure the default value is Auto
+	require.NoError(t, cmd.ParseFlags([]string{}))
+	require.NoError(t, SetupLogging(cmd.Flags()))
+	assert.IsType(t, &logrus.TextFormatter{}, logrus.StandardLogger().Formatter)
+
+	// Test JSON format
+	require.NoError(t, cmd.ParseFlags([]string{`--log-format`, `JSON`}))
+	require.NoError(t, SetupLogging(cmd.Flags()))
+	assert.IsType(t, &logrus.JSONFormatter{}, logrus.StandardLogger().Formatter)
+
+	// Test Pretty format
+	require.NoError(t, cmd.ParseFlags([]string{`--log-format`, `pretty`}))
+	require.NoError(t, SetupLogging(cmd.Flags()))
+	assert.IsType(t, &logrus.TextFormatter{}, logrus.StandardLogger().Formatter)
+	textFormatter, ok := (logrus.StandardLogger().Formatter).(*logrus.TextFormatter)
+	assert.True(t, ok)
+	assert.True(t, textFormatter.ForceColors)
+	assert.False(t, textFormatter.FullTimestamp)
+
+	// Test LogFmt format
+	require.NoError(t, cmd.ParseFlags([]string{`--log-format`, `logfmt`}))
+	require.NoError(t, SetupLogging(cmd.Flags()))
+	textFormatter, ok = (logrus.StandardLogger().Formatter).(*logrus.TextFormatter)
+	assert.True(t, ok)
+	assert.True(t, textFormatter.DisableColors)
+	assert.True(t, textFormatter.FullTimestamp)
+
+	// Test invalid format
+	require.NoError(t, cmd.ParseFlags([]string{`--log-format`, `cowsay`}))
+	require.Error(t, SetupLogging(cmd.Flags()))
+}
+
+func TestLogLevelFlag(t *testing.T) {
+	cmd := new(cobra.Command)
+
+	SetDefaults()
+	RegisterDockerFlags(cmd)
+	RegisterSystemFlags(cmd)
+
+	// Test invalid format
+	require.NoError(t, cmd.ParseFlags([]string{`--log-level`, `gossip`}))
+	require.Error(t, SetupLogging(cmd.Flags()))
+}
+
 func TestProcessFlagAliasesSchedAndInterval(t *testing.T) {
 	logrus.StandardLogger().ExitFunc = func(_ int) { panic(`FATAL`) }
 	cmd := new(cobra.Command)
@@ -202,9 +247,7 @@ func TestProcessFlagAliasesSchedAndInterval(t *testing.T) {
 func TestProcessFlagAliasesScheduleFromEnvironment(t *testing.T) {
 	cmd := new(cobra.Command)
 
-	err := os.Setenv("WATCHTOWER_SCHEDULE", `@hourly`)
-	require.NoError(t, err)
-	defer os.Unsetenv("WATCHTOWER_SCHEDULE")
+	t.Setenv("WATCHTOWER_SCHEDULE", `@hourly`)
 
 	SetDefaults()
 	RegisterDockerFlags(cmd)
@@ -234,3 +277,63 @@ func TestProcessFlagAliasesInvalidPorcelaineVersion(t *testing.T) {
 		ProcessFlagAliases(flags)
 	})
 }
+
+func TestFlagsArePrecentInDocumentation(t *testing.T) {
+
+	// Legacy notifcations are ignored, since they are (soft) deprecated
+	ignoredEnvs := map[string]string{
+		"WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI": "legacy",
+		"WATCHTOWER_NOTIFICATION_SLACK_ICON_URL":   "legacy",
+	}
+
+	ignoredFlags := map[string]string{
+		"notification-gotify-url":       "legacy",
+		"notification-slack-icon-emoji": "legacy",
+		"notification-slack-icon-url":   "legacy",
+	}
+
+	cmd := new(cobra.Command)
+	SetDefaults()
+	RegisterDockerFlags(cmd)
+	RegisterSystemFlags(cmd)
+	RegisterNotificationFlags(cmd)
+
+	flags := cmd.PersistentFlags()
+
+	docFiles := []string{
+		"../../docs/arguments.md",
+		"../../docs/lifecycle-hooks.md",
+		"../../docs/notifications.md",
+	}
+	allDocs := ""
+	for _, f := range docFiles {
+		bytes, err := os.ReadFile(f)
+		if err != nil {
+			t.Fatalf("Could not load docs file %q: %v", f, err)
+		}
+		allDocs += string(bytes)
+	}
+
+	flags.VisitAll(func(f *pflag.Flag) {
+		if !strings.Contains(allDocs, "--"+f.Name) {
+			if _, found := ignoredFlags[f.Name]; !found {
+				t.Logf("Docs does not mention flag long name %q", f.Name)
+				t.Fail()
+			}
+		}
+		if !strings.Contains(allDocs, "-"+f.Shorthand) {
+			t.Logf("Docs does not mention flag shorthand %q (%q)", f.Shorthand, f.Name)
+			t.Fail()
+		}
+	})
+
+	for _, key := range viper.AllKeys() {
+		envKey := strings.ToUpper(key)
+		if !strings.Contains(allDocs, envKey) {
+			if _, found := ignoredEnvs[envKey]; !found {
+				t.Logf("Docs does not mention environment variable %q", envKey)
+				t.Fail()
+			}
+		}
+	}
+}

internal/util/rand_sha256.go

@@ -0,0 +1,24 @@
+package util
+
+import (
+	"bytes"
+	"crypto/rand"
+	"fmt"
+)
+
+// GenerateRandomSHA256 generates a random 64 character SHA 256 hash string
+func GenerateRandomSHA256() string {
+	return GenerateRandomPrefixedSHA256()[7:]
+}
+
+// GenerateRandomPrefixedSHA256 generates a random 64 character SHA 256 hash string, prefixed with `sha256:`
+func GenerateRandomPrefixedSHA256() string {
+	hash := make([]byte, 32)
+	_, _ = rand.Read(hash)
+	sb := bytes.NewBufferString("sha256:")
+	sb.Grow(64)
+	for _, h := range hash {
+		_, _ = fmt.Fprintf(sb, "%02x", h)
+	}
+	return sb.String()
+}

internal/util/util_test.go

@@ -1,8 +1,10 @@
 package util
 
 import (
-	"github.com/stretchr/testify/assert"
+	"regexp"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestSliceEqual_True(t *testing.T) {
@@ -62,3 +64,15 @@ func TestStructMapSubtract(t *testing.T) {
 	assert.Equal(t, map[string]struct{}{"a": x, "b": x, "c": x}, m1)
 	assert.Equal(t, map[string]struct{}{"a": x, "c": x}, m2)
 }
+
+// GenerateRandomSHA256 generates a random 64 character SHA 256 hash string
+func TestGenerateRandomSHA256(t *testing.T) {
+	res := GenerateRandomSHA256()
+	assert.Len(t, res, 64)
+	assert.NotContains(t, res, "sha256:")
+}
+
+func TestGenerateRandomPrefixedSHA256(t *testing.T) {
+	res := GenerateRandomPrefixedSHA256()
+	assert.Regexp(t, regexp.MustCompile("sha256:[0-9|a-f]{64}"), res)
+}

mkdocs.yml

@@ -48,6 +48,7 @@ nav:
    - 'Stop signals': 'stop-signals.md'
    - 'Lifecycle hooks': 'lifecycle-hooks.md'
    - 'Running multiple instances': 'running-multiple-instances.md'
+   - 'HTTP API Mode': 'http-api-mode.md'
    - 'Metrics': 'metrics.md'
 plugins:
     - search

pkg/api/metrics/metrics_test.go

@@ -2,18 +2,18 @@ package metrics_test
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
 	"github.com/containrrr/watchtower/pkg/api"
 	metricsAPI "github.com/containrrr/watchtower/pkg/api/metrics"
 	"github.com/containrrr/watchtower/pkg/metrics"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
 )
 
 const (
@@ -36,7 +36,7 @@ func getWithToken(handler http.Handler) map[string]string {
 	handler.ServeHTTP(respWriter, req)
 
 	res := respWriter.Result()
-	body, _ := ioutil.ReadAll(res.Body)
+	body, _ := io.ReadAll(res.Body)
 
 	for _, line := range strings.Split(string(body), "\n") {
 		if len(line) < 1 || line[0] == '#' {

pkg/container/client.go

@@ -3,14 +3,10 @@ package container
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 	"time"
 
-	"github.com/containrrr/watchtower/pkg/registry"
-	"github.com/containrrr/watchtower/pkg/registry/digest"
-
-	t "github.com/containrrr/watchtower/pkg/types"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/filters"
@@ -18,6 +14,10 @@ import (
 	sdkClient "github.com/docker/docker/client"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
+
+	"github.com/containrrr/watchtower/pkg/registry"
+	"github.com/containrrr/watchtower/pkg/registry/digest"
+	t "github.com/containrrr/watchtower/pkg/types"
 )
 
 const defaultStopSignal = "SIGTERM"
@@ -25,23 +25,23 @@ const defaultStopSignal = "SIGTERM"
 // A Client is the interface through which watchtower interacts with the
 // Docker API.
 type Client interface {
-	ListContainers(t.Filter) ([]Container, error)
-	GetContainer(containerID t.ContainerID) (Container, error)
-	StopContainer(Container, time.Duration) error
-	StartContainer(Container) (t.ContainerID, error)
-	RenameContainer(Container, string) error
-	IsContainerStale(Container) (stale bool, latestImage t.ImageID, err error)
+	ListContainers(t.Filter) ([]t.Container, error)
+	GetContainer(containerID t.ContainerID) (t.Container, error)
+	StopContainer(t.Container, time.Duration) error
+	StartContainer(t.Container) (t.ContainerID, error)
+	RenameContainer(t.Container, string) error
+	IsContainerStale(t.Container, t.UpdateParams) (stale bool, latestImage t.ImageID, err error)
 	ExecuteCommand(containerID t.ContainerID, command string, timeout int) (SkipUpdate bool, err error)
 	RemoveImageByID(t.ImageID) error
-	WarnOnHeadPullFailed(container Container) bool
+	WarnOnHeadPullFailed(container t.Container) bool
 }
 
 // NewClient returns a new Client instance which can be used to interact with
 // the Docker API.
 // The client reads its configuration from the following environment variables:
-//  * DOCKER_HOST			the docker-engine host to send api requests to
-//  * DOCKER_TLS_VERIFY		whether to verify tls certificates
-//  * DOCKER_API_VERSION	the minimum docker api version to work with
+//   - DOCKER_HOST			the docker-engine host to send api requests to
+//   - DOCKER_TLS_VERIFY		whether to verify tls certificates
+//   - DOCKER_API_VERSION	the minimum docker api version to work with
 func NewClient(opts ClientOptions) Client {
 	cli, err := sdkClient.NewClientWithOpts(sdkClient.FromEnv)
 
@@ -57,7 +57,6 @@ func NewClient(opts ClientOptions) Client {
 
 // ClientOptions contains the options for how the docker client wrapper should behave
 type ClientOptions struct {
-	PullImages        bool
 	RemoveVolumes     bool
 	IncludeStopped    bool
 	ReviveStopped     bool
@@ -82,7 +81,7 @@ type dockerClient struct {
 	ClientOptions
 }
 
-func (client dockerClient) WarnOnHeadPullFailed(container Container) bool {
+func (client dockerClient) WarnOnHeadPullFailed(container t.Container) bool {
 	if client.WarnOnHeadFailed == WarnAlways {
 		return true
 	}
@@ -93,8 +92,8 @@ func (client dockerClient) WarnOnHeadPullFailed(container Container) bool {
 	return registry.WarnOnAPIConsumption(container)
 }
 
-func (client dockerClient) ListContainers(fn t.Filter) ([]Container, error) {
-	cs := []Container{}
+func (client dockerClient) ListContainers(fn t.Filter) ([]t.Container, error) {
+	cs := []t.Container{}
 	bg := context.Background()
 
 	if client.IncludeStopped && client.IncludeRestarting {
@@ -149,24 +148,40 @@ func (client dockerClient) createListFilter() filters.Args {
 	return filterArgs
 }
 
-func (client dockerClient) GetContainer(containerID t.ContainerID) (Container, error) {
+func (client dockerClient) GetContainer(containerID t.ContainerID) (t.Container, error) {
 	bg := context.Background()
 
 	containerInfo, err := client.api.ContainerInspect(bg, string(containerID))
 	if err != nil {
-		return Container{}, err
+		return &Container{}, err
+	}
+
+	netType, netContainerId, found := strings.Cut(string(containerInfo.HostConfig.NetworkMode), ":")
+	if found && netType == "container" {
+		parentContainer, err := client.api.ContainerInspect(bg, netContainerId)
+		if err != nil {
+			log.WithFields(map[string]interface{}{
+				"container":         containerInfo.Name,
+				"error":             err,
+				"network-container": netContainerId,
+			}).Warnf("Unable to resolve network container: %v", err)
+
+		} else {
+			// Replace the container ID with a container name to allow it to reference the re-created network container
+			containerInfo.HostConfig.NetworkMode = container.NetworkMode(fmt.Sprintf("container:%s", parentContainer.Name))
+		}
 	}
 
 	imageInfo, _, err := client.api.ImageInspectWithRaw(bg, containerInfo.Image)
 	if err != nil {
 		log.Warnf("Failed to retrieve container image info: %v", err)
-		return Container{containerInfo: &containerInfo, imageInfo: nil}, nil
+		return &Container{containerInfo: &containerInfo, imageInfo: nil}, nil
 	}
 
-	return Container{containerInfo: &containerInfo, imageInfo: &imageInfo}, nil
+	return &Container{containerInfo: &containerInfo, imageInfo: &imageInfo}, nil
 }
 
-func (client dockerClient) StopContainer(c Container, timeout time.Duration) error {
+func (client dockerClient) StopContainer(c t.Container, timeout time.Duration) error {
 	bg := context.Background()
 	signal := c.StopSignal()
 	if signal == "" {
@@ -186,12 +201,16 @@ func (client dockerClient) StopContainer(c Container, timeout time.Duration) err
 	// TODO: This should probably be checked.
 	_ = client.waitForStopOrTimeout(c, timeout)
 
-	if c.containerInfo.HostConfig.AutoRemove {
+	if c.ContainerInfo().HostConfig.AutoRemove {
 		log.Debugf("AutoRemove container %s, skipping ContainerRemove call.", shortID)
 	} else {
 		log.Debugf("Removing container %s", shortID)
 
 		if err := client.api.ContainerRemove(bg, idStr, types.ContainerRemoveOptions{Force: true, RemoveVolumes: client.RemoveVolumes}); err != nil {
+			if sdkClient.IsErrNotFound(err) {
+				log.Debugf("Container %s not found, skipping removal.", shortID)
+				return nil
+			}
 			return err
 		}
 	}
@@ -204,11 +223,34 @@ func (client dockerClient) StopContainer(c Container, timeout time.Duration) err
 	return nil
 }
 
-func (client dockerClient) StartContainer(c Container) (t.ContainerID, error) {
+func (client dockerClient) GetNetworkConfig(c t.Container) *network.NetworkingConfig {
+	config := &network.NetworkingConfig{
+		EndpointsConfig: c.ContainerInfo().NetworkSettings.Networks,
+	}
+
+	for _, ep := range config.EndpointsConfig {
+		aliases := make([]string, 0, len(ep.Aliases))
+		cidAlias := c.ID().ShortID()
+
+		// Remove the old container ID alias from the network aliases, as it would accumulate across updates otherwise
+		for _, alias := range ep.Aliases {
+			if alias == cidAlias {
+				continue
+			}
+			aliases = append(aliases, alias)
+		}
+
+		ep.Aliases = aliases
+	}
+	return config
+}
+
+func (client dockerClient) StartContainer(c t.Container) (t.ContainerID, error) {
 	bg := context.Background()
-	config := c.runtimeConfig()
-	hostConfig := c.hostConfig()
-	networkConfig := &network.NetworkingConfig{EndpointsConfig: c.containerInfo.NetworkSettings.Networks}
+	config := c.GetCreateConfig()
+	hostConfig := c.GetCreateHostConfig()
+	networkConfig := client.GetNetworkConfig(c)
+
 	// simpleNetworkConfig is a networkConfig with only 1 network.
 	// see: https://github.com/docker/docker/issues/29265
 	simpleNetworkConfig := func() *network.NetworkingConfig {
@@ -224,6 +266,7 @@ func (client dockerClient) StartContainer(c Container) (t.ContainerID, error) {
 	name := c.Name()
 
 	log.Infof("Creating %s", name)
+
 	createdContainer, err := client.api.ContainerCreate(bg, config, hostConfig, simpleNetworkConfig, nil, name)
 	if err != nil {
 		return "", err
@@ -256,7 +299,7 @@ func (client dockerClient) StartContainer(c Container) (t.ContainerID, error) {
 
 }
 
-func (client dockerClient) doStartContainer(bg context.Context, c Container, creation container.ContainerCreateCreatedBody) error {
+func (client dockerClient) doStartContainer(bg context.Context, c t.Container, creation container.CreateResponse) error {
 	name := c.Name()
 
 	log.Debugf("Starting container %s (%s)", name, t.ContainerID(creation.ID).ShortID())
@@ -267,16 +310,16 @@ func (client dockerClient) doStartContainer(bg context.Context, c Container, cre
 	return nil
 }
 
-func (client dockerClient) RenameContainer(c Container, newName string) error {
+func (client dockerClient) RenameContainer(c t.Container, newName string) error {
 	bg := context.Background()
 	log.Debugf("Renaming container %s (%s) to %s", c.Name(), c.ID().ShortID(), newName)
 	return client.api.ContainerRename(bg, string(c.ID()), newName)
 }
 
-func (client dockerClient) IsContainerStale(container Container) (stale bool, latestImage t.ImageID, err error) {
+func (client dockerClient) IsContainerStale(container t.Container, params t.UpdateParams) (stale bool, latestImage t.ImageID, err error) {
 	ctx := context.Background()
 
-	if !client.PullImages {
+	if container.IsNoPull(params) {
 		log.Debugf("Skipping image pull.")
 	} else if err := client.PullImage(ctx, container); err != nil {
 		return false, container.SafeImageID(), err
@@ -285,8 +328,8 @@ func (client dockerClient) IsContainerStale(container Container) (stale bool, la
 	return client.HasNewImage(ctx, container)
 }
 
-func (client dockerClient) HasNewImage(ctx context.Context, container Container) (hasNew bool, latestImage t.ImageID, err error) {
-	currentImageID := t.ImageID(container.containerInfo.ContainerJSONBase.Image)
+func (client dockerClient) HasNewImage(ctx context.Context, container t.Container) (hasNew bool, latestImage t.ImageID, err error) {
+	currentImageID := t.ImageID(container.ContainerInfo().ContainerJSONBase.Image)
 	imageName := container.ImageName()
 
 	newImageInfo, _, err := client.api.ImageInspectWithRaw(ctx, imageName)
@@ -306,7 +349,7 @@ func (client dockerClient) HasNewImage(ctx context.Context, container Container)
 
 // PullImage pulls the latest image for the supplied container, optionally skipping if it's digest can be confirmed
 // to match the one that the registry reports via a HEAD request
-func (client dockerClient) PullImage(ctx context.Context, container Container) error {
+func (client dockerClient) PullImage(ctx context.Context, container t.Container) error {
 	containerName := container.Name()
 	imageName := container.ImageName()
 
@@ -355,7 +398,7 @@ func (client dockerClient) PullImage(ctx context.Context, container Container) e
 
 	defer response.Close()
 	// the pull request will be aborted prematurely unless the response is read
-	if _, err = ioutil.ReadAll(response); err != nil {
+	if _, err = io.ReadAll(response); err != nil {
 		log.Error(err)
 		return err
 	}
@@ -365,13 +408,34 @@ func (client dockerClient) PullImage(ctx context.Context, container Container) e
 func (client dockerClient) RemoveImageByID(id t.ImageID) error {
 	log.Infof("Removing image %s", id.ShortID())
 
-	_, err := client.api.ImageRemove(
+	items, err := client.api.ImageRemove(
 		context.Background(),
 		string(id),
 		types.ImageRemoveOptions{
 			Force: true,
 		})
 
+	if log.IsLevelEnabled(log.DebugLevel) {
+		deleted := strings.Builder{}
+		untagged := strings.Builder{}
+		for _, item := range items {
+			if item.Deleted != "" {
+				if deleted.Len() > 0 {
+					deleted.WriteString(`, `)
+				}
+				deleted.WriteString(t.ImageID(item.Deleted).ShortID())
+			}
+			if item.Untagged != "" {
+				if untagged.Len() > 0 {
+					untagged.WriteString(`, `)
+				}
+				untagged.WriteString(t.ImageID(item.Untagged).ShortID())
+			}
+		}
+		fields := log.Fields{`deleted`: deleted.String(), `untagged`: untagged.String()}
+		log.WithFields(fields).Debug("Image removal completed")
+	}
+
 	return err
 }
 
@@ -474,7 +538,7 @@ func (client dockerClient) waitForExecOrTimeout(bg context.Context, ID string, e
 	return false, nil
 }
 
-func (client dockerClient) waitForStopOrTimeout(c Container, waitTime time.Duration) error {
+func (client dockerClient) waitForStopOrTimeout(c t.Container, waitTime time.Duration) error {
 	bg := context.Background()
 	timeout := time.After(waitTime)
 

pkg/container/client_test.go

@@ -1,6 +1,10 @@
 package container
 
 import (
+	"github.com/docker/docker/api/types/network"
+	"time"
+
+	"github.com/containrrr/watchtower/internal/util"
 	"github.com/containrrr/watchtower/pkg/container/mocks"
 	"github.com/containrrr/watchtower/pkg/filters"
 	t "github.com/containrrr/watchtower/pkg/types"
@@ -8,6 +12,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/backend"
 	cli "github.com/docker/docker/client"
+	"github.com/docker/docker/errdefs"
 	"github.com/onsi/gomega/gbytes"
 	"github.com/onsi/gomega/ghttp"
 	"github.com/sirupsen/logrus"
@@ -33,8 +38,8 @@ var _ = Describe("the client", func() {
 		mockServer.Close()
 	})
 	Describe("WarnOnHeadPullFailed", func() {
-		containerUnknown := *mockContainerWithImageName("unknown.repo/prefix/imagename:latest")
-		containerKnown := *mockContainerWithImageName("docker.io/prefix/imagename:latest")
+		containerUnknown := MockContainer(WithImageName("unknown.repo/prefix/imagename:latest"))
+		containerKnown := MockContainer(WithImageName("docker.io/prefix/imagename:latest"))
 
 		When(`warn on head failure is set to "always"`, func() {
 			c := dockerClient{ClientOptions: ClientOptions{WarnOnHeadFailed: WarnAlways}}
@@ -64,8 +69,72 @@ var _ = Describe("the client", func() {
 		When("the image consist of a pinned hash", func() {
 			It("should gracefully fail with a useful message", func() {
 				c := dockerClient{}
-				pinnedContainer := *mockContainerWithImageName("sha256:fa5269854a5e615e51a72b17ad3fd1e01268f278a6684c8ed3c5f0cdce3f230b")
-				c.PullImage(context.Background(), pinnedContainer)
+				pinnedContainer := MockContainer(WithImageName("sha256:fa5269854a5e615e51a72b17ad3fd1e01268f278a6684c8ed3c5f0cdce3f230b"))
+				err := c.PullImage(context.Background(), pinnedContainer)
+				Expect(err).To(MatchError(`container uses a pinned image, and cannot be updated by watchtower`))
+			})
+		})
+	})
+	When("removing a running container", func() {
+		When("the container still exist after stopping", func() {
+			It("should attempt to remove the container", func() {
+				container := MockContainer(WithContainerState(types.ContainerState{Running: true}))
+				containerStopped := MockContainer(WithContainerState(types.ContainerState{Running: false}))
+
+				cid := container.ContainerInfo().ID
+				mockServer.AppendHandlers(
+					mocks.KillContainerHandler(cid, mocks.Found),
+					mocks.GetContainerHandler(cid, containerStopped.ContainerInfo()),
+					mocks.RemoveContainerHandler(cid, mocks.Found),
+					mocks.GetContainerHandler(cid, nil),
+				)
+
+				Expect(dockerClient{api: docker}.StopContainer(container, time.Minute)).To(Succeed())
+			})
+		})
+		When("the container does not exist after stopping", func() {
+			It("should not cause an error", func() {
+				container := MockContainer(WithContainerState(types.ContainerState{Running: true}))
+
+				cid := container.ContainerInfo().ID
+				mockServer.AppendHandlers(
+					mocks.KillContainerHandler(cid, mocks.Found),
+					mocks.GetContainerHandler(cid, nil),
+					mocks.RemoveContainerHandler(cid, mocks.Missing),
+				)
+
+				Expect(dockerClient{api: docker}.StopContainer(container, time.Minute)).To(Succeed())
+			})
+		})
+	})
+	When("removing a image", func() {
+		When("debug logging is enabled", func() {
+			It("should log removed and untagged images", func() {
+				imageA := util.GenerateRandomSHA256()
+				imageAParent := util.GenerateRandomSHA256()
+				images := map[string][]string{imageA: {imageAParent}}
+				mockServer.AppendHandlers(mocks.RemoveImageHandler(images))
+				c := dockerClient{api: docker}
+
+				resetLogrus, logbuf := captureLogrus(logrus.DebugLevel)
+				defer resetLogrus()
+
+				Expect(c.RemoveImageByID(t.ImageID(imageA))).To(Succeed())
+
+				shortA := t.ImageID(imageA).ShortID()
+				shortAParent := t.ImageID(imageAParent).ShortID()
+
+				Eventually(logbuf).Should(gbytes.Say(`deleted="%v, %v" untagged="?%v"?`, shortA, shortAParent, shortA))
+			})
+		})
+		When("image is not found", func() {
+			It("should return an error", func() {
+				image := util.GenerateRandomSHA256()
+				mockServer.AppendHandlers(mocks.RemoveImageHandler(nil))
+				c := dockerClient{api: docker}
+
+				err := c.RemoveImageByID(t.ImageID(image))
+				Expect(errdefs.IsNotFound(err)).To(BeTrue())
 			})
 		})
 	})
@@ -73,10 +142,10 @@ var _ = Describe("the client", func() {
 		When("no filter is provided", func() {
 			It("should return all available containers", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("watchtower", "running")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Watchtower, &mocks.Running)...)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false},
+					ClientOptions: ClientOptions{},
 				}
 				containers, err := client.ListContainers(filters.NoFilter)
 				Expect(err).NotTo(HaveOccurred())
@@ -86,11 +155,11 @@ var _ = Describe("the client", func() {
 		When("a filter matching nothing", func() {
 			It("should return an empty array", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("watchtower", "running")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Watchtower, &mocks.Running)...)
 				filter := filters.FilterByNames([]string{"lollercoaster"}, filters.NoFilter)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false},
+					ClientOptions: ClientOptions{},
 				}
 				containers, err := client.ListContainers(filter)
 				Expect(err).NotTo(HaveOccurred())
@@ -100,10 +169,10 @@ var _ = Describe("the client", func() {
 		When("a watchtower filter is provided", func() {
 			It("should return only the watchtower container", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("watchtower", "running")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Watchtower, &mocks.Running)...)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false},
+					ClientOptions: ClientOptions{},
 				}
 				containers, err := client.ListContainers(filters.WatchtowerContainersFilter)
 				Expect(err).NotTo(HaveOccurred())
@@ -113,10 +182,10 @@ var _ = Describe("the client", func() {
 		When(`include stopped is enabled`, func() {
 			It("should return both stopped and running containers", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running", "exited", "created"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("stopped", "watchtower", "running")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Stopped, &mocks.Watchtower, &mocks.Running)...)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false, IncludeStopped: true},
+					ClientOptions: ClientOptions{IncludeStopped: true},
 				}
 				containers, err := client.ListContainers(filters.NoFilter)
 				Expect(err).NotTo(HaveOccurred())
@@ -126,10 +195,10 @@ var _ = Describe("the client", func() {
 		When(`include restarting is enabled`, func() {
 			It("should return both restarting and running containers", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running", "restarting"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("watchtower", "running", "restarting")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Watchtower, &mocks.Running, &mocks.Restarting)...)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false, IncludeRestarting: true},
+					ClientOptions: ClientOptions{IncludeRestarting: true},
 				}
 				containers, err := client.ListContainers(filters.NoFilter)
 				Expect(err).NotTo(HaveOccurred())
@@ -139,30 +208,58 @@ var _ = Describe("the client", func() {
 		When(`include restarting is disabled`, func() {
 			It("should not return restarting containers", func() {
 				mockServer.AppendHandlers(mocks.ListContainersHandler("running"))
-				mockServer.AppendHandlers(mocks.GetContainerHandlers("watchtower", "running")...)
+				mockServer.AppendHandlers(mocks.GetContainerHandlers(&mocks.Watchtower, &mocks.Running)...)
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false, IncludeRestarting: false},
+					ClientOptions: ClientOptions{IncludeRestarting: false},
 				}
 				containers, err := client.ListContainers(filters.NoFilter)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(containers).NotTo(ContainElement(havingRestartingState(true)))
 			})
 		})
+		When(`a container uses container network mode`, func() {
+			When(`the network container can be resolved`, func() {
+				It("should return the container name instead of the ID", func() {
+					consumerContainerRef := mocks.NetConsumerOK
+					mockServer.AppendHandlers(mocks.GetContainerHandlers(&consumerContainerRef)...)
+					client := dockerClient{
+						api:           docker,
+						ClientOptions: ClientOptions{},
+					}
+					container, err := client.GetContainer(consumerContainerRef.ContainerID())
+					Expect(err).NotTo(HaveOccurred())
+					networkMode := container.ContainerInfo().HostConfig.NetworkMode
+					Expect(networkMode.ConnectedContainer()).To(Equal(mocks.NetSupplierContainerName))
+				})
+			})
+			When(`the network container cannot be resolved`, func() {
+				It("should still return the container ID", func() {
+					consumerContainerRef := mocks.NetConsumerInvalidSupplier
+					mockServer.AppendHandlers(mocks.GetContainerHandlers(&consumerContainerRef)...)
+					client := dockerClient{
+						api:           docker,
+						ClientOptions: ClientOptions{},
+					}
+					container, err := client.GetContainer(consumerContainerRef.ContainerID())
+					Expect(err).NotTo(HaveOccurred())
+					networkMode := container.ContainerInfo().HostConfig.NetworkMode
+					Expect(networkMode.ConnectedContainer()).To(Equal(mocks.NetSupplierNotFoundID))
+				})
+			})
+		})
 	})
 	Describe(`ExecuteCommand`, func() {
 		When(`logging`, func() {
 			It("should include container id field", func() {
 				client := dockerClient{
 					api:           docker,
-					ClientOptions: ClientOptions{PullImages: false},
+					ClientOptions: ClientOptions{},
 				}
 
 				// Capture logrus output in buffer
-				logbuf := gbytes.NewBuffer()
-				origOut := logrus.StandardLogger().Out
-				defer logrus.SetOutput(origOut)
-				logrus.SetOutput(logbuf)
+				resetLogrus, logbuf := captureLogrus(logrus.DebugLevel)
+				defer resetLogrus()
 
 				user := ""
 				containerID := t.ContainerID("ex-cont-id")
@@ -219,26 +316,62 @@ var _ = Describe("the client", func() {
 			})
 		})
 	})
+	Describe(`GetNetworkConfig`, func() {
+		When(`providing a container with network aliases`, func() {
+			It(`should omit the container ID alias`, func() {
+				client := dockerClient{
+					api:           docker,
+					ClientOptions: ClientOptions{IncludeRestarting: false},
+				}
+				container := MockContainer(WithImageName("docker.io/prefix/imagename:latest"))
+
+				aliases := []string{"One", "Two", container.ID().ShortID(), "Four"}
+				endpoints := map[string]*network.EndpointSettings{
+					`test`: {Aliases: aliases},
+				}
+				container.containerInfo.NetworkSettings = &types.NetworkSettings{Networks: endpoints}
+				Expect(container.ContainerInfo().NetworkSettings.Networks[`test`].Aliases).To(Equal(aliases))
+				Expect(client.GetNetworkConfig(container).EndpointsConfig[`test`].Aliases).To(Equal([]string{"One", "Two", "Four"}))
+			})
+		})
+	})
 })
 
+// Capture logrus output in buffer
+func captureLogrus(level logrus.Level) (func(), *gbytes.Buffer) {
+
+	logbuf := gbytes.NewBuffer()
+
+	origOut := logrus.StandardLogger().Out
+	logrus.SetOutput(logbuf)
+
+	origLev := logrus.StandardLogger().Level
+	logrus.SetLevel(level)
+
+	return func() {
+		logrus.SetOutput(origOut)
+		logrus.SetLevel(origLev)
+	}, logbuf
+}
+
 // Gomega matcher helpers
 
 func withContainerImageName(matcher gt.GomegaMatcher) gt.GomegaMatcher {
 	return WithTransform(containerImageName, matcher)
 }
 
-func containerImageName(container Container) string {
+func containerImageName(container t.Container) string {
 	return container.ImageName()
 }
 
 func havingRestartingState(expected bool) gt.GomegaMatcher {
-	return WithTransform(func(container Container) bool {
-		return container.containerInfo.State.Restarting
+	return WithTransform(func(container t.Container) bool {
+		return container.ContainerInfo().State.Restarting
 	}, Equal(expected))
 }
 
 func havingRunningState(expected bool) gt.GomegaMatcher {
-	return WithTransform(func(container Container) bool {
-		return container.containerInfo.State.Running
+	return WithTransform(func(container t.Container) bool {
+		return container.ContainerInfo().State.Running
 	}, Equal(expected))
 }

pkg/container/container.go

@@ -2,12 +2,14 @@
 package container
 
 import (
+	"errors"
 	"fmt"
 	"strconv"
 	"strings"
 
 	"github.com/containrrr/watchtower/internal/util"
 	wt "github.com/containrrr/watchtower/pkg/types"
+	"github.com/sirupsen/logrus"
 
 	"github.com/docker/docker/api/types"
 	dockercontainer "github.com/docker/docker/api/types/container"
@@ -32,6 +34,26 @@ type Container struct {
 	imageInfo     *types.ImageInspect
 }
 
+// IsLinkedToRestarting returns the current value of the LinkedToRestarting field for the container
+func (c *Container) IsLinkedToRestarting() bool {
+	return c.LinkedToRestarting
+}
+
+// IsStale returns the current value of the Stale field for the container
+func (c *Container) IsStale() bool {
+	return c.Stale
+}
+
+// SetLinkedToRestarting sets the LinkedToRestarting field for the container
+func (c *Container) SetLinkedToRestarting(value bool) {
+	c.LinkedToRestarting = value
+}
+
+// SetStale implements sets the Stale field for the container
+func (c *Container) SetStale(value bool) {
+	c.Stale = value
+}
+
 // ContainerInfo fetches JSON info for the container
 func (c Container) ContainerInfo() *types.ContainerJSON {
 	return c.containerInfo
@@ -109,20 +131,31 @@ func (c Container) Enabled() (bool, bool) {
 	return parsedBool, true
 }
 
-// IsMonitorOnly returns the value of the monitor-only label. If the label
-// is not set then false is returned.
-func (c Container) IsMonitorOnly() bool {
-	rawBool, ok := c.getLabelValue(monitorOnlyLabel)
-	if !ok {
-		return false
-	}
+// IsMonitorOnly returns whether the container should only be monitored based on values of
+// the monitor-only label, the monitor-only argument and the label-take-precedence argument.
+func (c Container) IsMonitorOnly(params wt.UpdateParams) bool {
+	return c.getContainerOrGlobalBool(params.MonitorOnly, monitorOnlyLabel, params.LabelPrecedence)
+}
 
-	parsedBool, err := strconv.ParseBool(rawBool)
-	if err != nil {
-		return false
-	}
+// IsNoPull returns whether the image should be pulled based on values of
+// the no-pull label, the no-pull argument and the label-take-precedence argument.
+func (c Container) IsNoPull(params wt.UpdateParams) bool {
+	return c.getContainerOrGlobalBool(params.NoPull, noPullLabel, params.LabelPrecedence)
+}
 
-	return parsedBool
+func (c Container) getContainerOrGlobalBool(globalVal bool, label string, contPrecedence bool) bool {
+	if contVal, err := c.getBoolLabelValue(label); err != nil {
+		if !errors.Is(err, errorLabelNotFound) {
+			logrus.WithField("error", err).WithField("label", label).Warn("Failed to parse label value")
+		}
+		return globalVal
+	} else {
+		if contPrecedence {
+			return contVal
+		} else {
+			return contVal || globalVal
+		}
+	}
 }
 
 // Scope returns the value of the scope UID label and if the label
@@ -144,7 +177,14 @@ func (c Container) Links() []string {
 	dependsOnLabelValue := c.getLabelValueOrEmpty(dependsOnLabel)
 
 	if dependsOnLabelValue != "" {
-		links := strings.Split(dependsOnLabelValue, ",")
+		for _, link := range strings.Split(dependsOnLabelValue, ",") {
+			// Since the container names need to start with '/', let's prepend it if it's missing
+			if !strings.HasPrefix(link, "/") {
+				link = "/" + link
+			}
+			links = append(links, link)
+		}
+
 		return links
 	}
 
@@ -153,6 +193,13 @@ func (c Container) Links() []string {
 			name := strings.Split(link, ":")[0]
 			links = append(links, name)
 		}
+
+		// If the container uses another container for networking, it can be considered an implicit link
+		// since the container would stop working if the network supplier were to be recreated
+		networkMode := c.containerInfo.HostConfig.NetworkMode
+		if networkMode.IsContainer() {
+			links = append(links, networkMode.ConnectedContainer())
+		}
 	}
 
 	return links
@@ -217,18 +264,23 @@ func (c Container) StopSignal() string {
 	return c.getLabelValueOrEmpty(signalLabel)
 }
 
+// GetCreateConfig returns the container's current Config converted into a format
+// that can be re-submitted to the Docker create API.
+//
 // Ideally, we'd just be able to take the ContainerConfig from the old container
 // and use it as the starting point for creating the new container; however,
 // the ContainerConfig that comes back from the Inspect call merges the default
 // configuration (the stuff specified in the metadata for the image itself)
 // with the overridden configuration (the stuff that you might specify as part
-// of the "docker run"). In order to avoid unintentionally overriding the
+// of the "docker run").
+//
+// In order to avoid unintentionally overriding the
 // defaults in the new image we need to separate the override options from the
 // default options. To do this we have to compare the ContainerConfig for the
 // running container with the ContainerConfig from the image that container was
 // started from. This function returns a ContainerConfig which contains just
 // the options overridden at runtime.
-func (c Container) runtimeConfig() *dockercontainer.Config {
+func (c Container) GetCreateConfig() *dockercontainer.Config {
 	config := c.containerInfo.Config
 	hostConfig := c.containerInfo.HostConfig
 	imageConfig := c.imageInfo.Config
@@ -252,6 +304,29 @@ func (c Container) runtimeConfig() *dockercontainer.Config {
 		}
 	}
 
+	// Clear HEALTHCHECK configuration (if default)
+	if config.Healthcheck != nil && imageConfig.Healthcheck != nil {
+		if util.SliceEqual(config.Healthcheck.Test, imageConfig.Healthcheck.Test) {
+			config.Healthcheck.Test = nil
+		}
+
+		if config.Healthcheck.Retries == imageConfig.Healthcheck.Retries {
+			config.Healthcheck.Retries = 0
+		}
+
+		if config.Healthcheck.Interval == imageConfig.Healthcheck.Interval {
+			config.Healthcheck.Interval = 0
+		}
+
+		if config.Healthcheck.Timeout == imageConfig.Healthcheck.Timeout {
+			config.Healthcheck.Timeout = 0
+		}
+
+		if config.Healthcheck.StartPeriod == imageConfig.Healthcheck.StartPeriod {
+			config.Healthcheck.StartPeriod = 0
+		}
+	}
+
 	config.Env = util.SliceSubtract(config.Env, imageConfig.Env)
 
 	config.Labels = util.StringMapSubtract(config.Labels, imageConfig.Labels)
@@ -272,9 +347,9 @@ func (c Container) runtimeConfig() *dockercontainer.Config {
 	return config
 }
 
-// Any links in the HostConfig need to be re-written before they can be
-// re-submitted to the Docker create API.
-func (c Container) hostConfig() *dockercontainer.HostConfig {
+// GetCreateHostConfig returns the container's current HostConfig with any links
+// re-written so that they can be re-submitted to the Docker create API.
+func (c Container) GetCreateHostConfig() *dockercontainer.HostConfig {
 	hostConfig := c.containerInfo.HostConfig
 
 	for i, link := range hostConfig.Links {

pkg/container/container_mock_test.go

@@ -0,0 +1,79 @@
+package container
+
+import (
+	"github.com/docker/docker/api/types"
+	dockerContainer "github.com/docker/docker/api/types/container"
+	"github.com/docker/go-connections/nat"
+)
+
+type MockContainerUpdate func(*types.ContainerJSON, *types.ImageInspect)
+
+func MockContainer(updates ...MockContainerUpdate) *Container {
+	containerInfo := types.ContainerJSON{
+		ContainerJSONBase: &types.ContainerJSONBase{
+			ID:         "container_id",
+			Image:      "image",
+			Name:       "test-containrrr",
+			HostConfig: &dockerContainer.HostConfig{},
+		},
+		Config: &dockerContainer.Config{
+			Labels: map[string]string{},
+		},
+	}
+	image := types.ImageInspect{
+		ID:     "image_id",
+		Config: &dockerContainer.Config{},
+	}
+
+	for _, update := range updates {
+		update(&containerInfo, &image)
+	}
+	return NewContainer(&containerInfo, &image)
+}
+
+func WithPortBindings(portBindingSources ...string) MockContainerUpdate {
+	return func(c *types.ContainerJSON, i *types.ImageInspect) {
+		portBindings := nat.PortMap{}
+		for _, pbs := range portBindingSources {
+			portBindings[nat.Port(pbs)] = []nat.PortBinding{}
+		}
+		c.HostConfig.PortBindings = portBindings
+	}
+}
+
+func WithImageName(name string) MockContainerUpdate {
+	return func(c *types.ContainerJSON, i *types.ImageInspect) {
+		c.Config.Image = name
+		i.RepoTags = append(i.RepoTags, name)
+	}
+}
+
+func WithLinks(links []string) MockContainerUpdate {
+	return func(c *types.ContainerJSON, i *types.ImageInspect) {
+		c.HostConfig.Links = links
+	}
+}
+
+func WithLabels(labels map[string]string) MockContainerUpdate {
+	return func(c *types.ContainerJSON, i *types.ImageInspect) {
+		c.Config.Labels = labels
+	}
+}
+
+func WithContainerState(state types.ContainerState) MockContainerUpdate {
+	return func(cnt *types.ContainerJSON, img *types.ImageInspect) {
+		cnt.State = &state
+	}
+}
+
+func WithHealthcheck(healthConfig dockerContainer.HealthConfig) MockContainerUpdate {
+	return func(cnt *types.ContainerJSON, img *types.ImageInspect) {
+		cnt.Config.Healthcheck = &healthConfig
+	}
+}
+
+func WithImageHealthcheck(healthConfig dockerContainer.HealthConfig) MockContainerUpdate {
+	return func(cnt *types.ContainerJSON, img *types.ImageInspect) {
+		img.Config.Healthcheck = &healthConfig
+	}
+}

pkg/container/container_test.go

@@ -1,8 +1,8 @@
 package container
 
 import (
-	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/container"
+	"github.com/containrrr/watchtower/pkg/types"
+	dc "github.com/docker/docker/api/types/container"
 	"github.com/docker/go-connections/nat"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -12,7 +12,7 @@ var _ = Describe("the container", func() {
 	Describe("VerifyConfiguration", func() {
 		When("verifying a container with no image info", func() {
 			It("should return an error", func() {
-				c := mockContainerWithPortBindings()
+				c := MockContainer(WithPortBindings())
 				c.imageInfo = nil
 				err := c.VerifyConfiguration()
 				Expect(err).To(Equal(errorNoImageInfo))
@@ -20,7 +20,7 @@ var _ = Describe("the container", func() {
 		})
 		When("verifying a container with no container info", func() {
 			It("should return an error", func() {
-				c := mockContainerWithPortBindings()
+				c := MockContainer(WithPortBindings())
 				c.containerInfo = nil
 				err := c.VerifyConfiguration()
 				Expect(err).To(Equal(errorNoContainerInfo))
@@ -28,7 +28,7 @@ var _ = Describe("the container", func() {
 		})
 		When("verifying a container with no config", func() {
 			It("should return an error", func() {
-				c := mockContainerWithPortBindings()
+				c := MockContainer(WithPortBindings())
 				c.containerInfo.Config = nil
 				err := c.VerifyConfiguration()
 				Expect(err).To(Equal(errorInvalidConfig))
@@ -36,7 +36,7 @@ var _ = Describe("the container", func() {
 		})
 		When("verifying a container with no host config", func() {
 			It("should return an error", func() {
-				c := mockContainerWithPortBindings()
+				c := MockContainer(WithPortBindings())
 				c.containerInfo.HostConfig = nil
 				err := c.VerifyConfiguration()
 				Expect(err).To(Equal(errorInvalidConfig))
@@ -44,14 +44,14 @@ var _ = Describe("the container", func() {
 		})
 		When("verifying a container with no port bindings", func() {
 			It("should not return an error", func() {
-				c := mockContainerWithPortBindings()
+				c := MockContainer(WithPortBindings())
 				err := c.VerifyConfiguration()
 				Expect(err).ToNot(HaveOccurred())
 			})
 		})
 		When("verifying a container with port bindings, but no exposed ports", func() {
 			It("should make the config compatible with updating", func() {
-				c := mockContainerWithPortBindings("80/tcp")
+				c := MockContainer(WithPortBindings("80/tcp"))
 				c.containerInfo.Config.ExposedPorts = nil
 				Expect(c.VerifyConfiguration()).To(Succeed())
 
@@ -61,20 +61,107 @@ var _ = Describe("the container", func() {
 		})
 		When("verifying a container with port bindings and exposed ports is non-nil", func() {
 			It("should return an error", func() {
-				c := mockContainerWithPortBindings("80/tcp")
+				c := MockContainer(WithPortBindings("80/tcp"))
 				c.containerInfo.Config.ExposedPorts = map[nat.Port]struct{}{"80/tcp": {}}
 				err := c.VerifyConfiguration()
 				Expect(err).ToNot(HaveOccurred())
 			})
 		})
 	})
+	Describe("GetCreateConfig", func() {
+		When("container healthcheck config is equal to image config", func() {
+			It("should return empty healthcheck values", func() {
+				c := MockContainer(WithHealthcheck(dc.HealthConfig{
+					Test: []string{"/usr/bin/sleep", "1s"},
+				}), WithImageHealthcheck(dc.HealthConfig{
+					Test: []string{"/usr/bin/sleep", "1s"},
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{}))
+
+				c = MockContainer(WithHealthcheck(dc.HealthConfig{
+					Timeout: 30,
+				}), WithImageHealthcheck(dc.HealthConfig{
+					Timeout: 30,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{}))
+
+				c = MockContainer(WithHealthcheck(dc.HealthConfig{
+					StartPeriod: 30,
+				}), WithImageHealthcheck(dc.HealthConfig{
+					StartPeriod: 30,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{}))
+
+				c = MockContainer(WithHealthcheck(dc.HealthConfig{
+					Retries: 30,
+				}), WithImageHealthcheck(dc.HealthConfig{
+					Retries: 30,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{}))
+			})
+		})
+		When("container healthcheck config is different to image config", func() {
+			It("should return the container healthcheck values", func() {
+				c := MockContainer(WithHealthcheck(dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "1s"},
+					Interval:    30,
+					Timeout:     30,
+					StartPeriod: 10,
+					Retries:     2,
+				}), WithImageHealthcheck(dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "10s"},
+					Interval:    10,
+					Timeout:     60,
+					StartPeriod: 30,
+					Retries:     10,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "1s"},
+					Interval:    30,
+					Timeout:     30,
+					StartPeriod: 10,
+					Retries:     2,
+				}))
+			})
+		})
+		When("container healthcheck config is empty", func() {
+			It("should not panic", func() {
+				c := MockContainer(WithImageHealthcheck(dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "10s"},
+					Interval:    10,
+					Timeout:     60,
+					StartPeriod: 30,
+					Retries:     10,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(BeNil())
+			})
+		})
+		When("container image healthcheck config is empty", func() {
+			It("should not panic", func() {
+				c := MockContainer(WithHealthcheck(dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "1s"},
+					Interval:    30,
+					Timeout:     30,
+					StartPeriod: 10,
+					Retries:     2,
+				}))
+				Expect(c.GetCreateConfig().Healthcheck).To(Equal(&dc.HealthConfig{
+					Test:        []string{"/usr/bin/sleep", "1s"},
+					Interval:    30,
+					Timeout:     30,
+					StartPeriod: 10,
+					Retries:     2,
+				}))
+			})
+		})
+	})
 	When("asked for metadata", func() {
 		var c *Container
 		BeforeEach(func() {
-			c = mockContainerWithLabels(map[string]string{
+			c = MockContainer(WithLabels(map[string]string{
 				"com.centurylinklabs.watchtower.enable": "true",
 				"com.centurylinklabs.watchtower":        "true",
-			})
+			}))
 		})
 		It("should return its name on calls to .Name()", func() {
 			name := c.Name()
@@ -91,36 +178,28 @@ var _ = Describe("the container", func() {
 			enabled, exists := c.Enabled()
 
 			Expect(enabled).To(BeTrue())
-			Expect(enabled).NotTo(BeFalse())
 			Expect(exists).To(BeTrue())
-			Expect(exists).NotTo(BeFalse())
 		})
 		It("should return false, true if present but not true on calls to .Enabled()", func() {
-			c = mockContainerWithLabels(map[string]string{"com.centurylinklabs.watchtower.enable": "false"})
+			c = MockContainer(WithLabels(map[string]string{"com.centurylinklabs.watchtower.enable": "false"}))
 			enabled, exists := c.Enabled()
 
 			Expect(enabled).To(BeFalse())
-			Expect(enabled).NotTo(BeTrue())
 			Expect(exists).To(BeTrue())
-			Expect(exists).NotTo(BeFalse())
 		})
 		It("should return false, false if not present on calls to .Enabled()", func() {
-			c = mockContainerWithLabels(map[string]string{"lol": "false"})
+			c = MockContainer(WithLabels(map[string]string{"lol": "false"}))
 			enabled, exists := c.Enabled()
 
 			Expect(enabled).To(BeFalse())
-			Expect(enabled).NotTo(BeTrue())
 			Expect(exists).To(BeFalse())
-			Expect(exists).NotTo(BeTrue())
 		})
 		It("should return false, false if present but not parsable .Enabled()", func() {
-			c = mockContainerWithLabels(map[string]string{"com.centurylinklabs.watchtower.enable": "falsy"})
+			c = MockContainer(WithLabels(map[string]string{"com.centurylinklabs.watchtower.enable": "falsy"}))
 			enabled, exists := c.Enabled()
 
 			Expect(enabled).To(BeFalse())
-			Expect(enabled).NotTo(BeTrue())
 			Expect(exists).To(BeFalse())
-			Expect(exists).NotTo(BeTrue())
 		})
 		When("checking if its a watchtower instance", func() {
 			It("should return true if the label is set to true", func() {
@@ -128,31 +207,31 @@ var _ = Describe("the container", func() {
 				Expect(isWatchtower).To(BeTrue())
 			})
 			It("should return false if the label is present but set to false", func() {
-				c = mockContainerWithLabels(map[string]string{"com.centurylinklabs.watchtower": "false"})
+				c = MockContainer(WithLabels(map[string]string{"com.centurylinklabs.watchtower": "false"}))
 				isWatchtower := c.IsWatchtower()
 				Expect(isWatchtower).To(BeFalse())
 			})
 			It("should return false if the label is not present", func() {
-				c = mockContainerWithLabels(map[string]string{"funny.label": "false"})
+				c = MockContainer(WithLabels(map[string]string{"funny.label": "false"}))
 				isWatchtower := c.IsWatchtower()
 				Expect(isWatchtower).To(BeFalse())
 			})
 			It("should return false if there are no labels", func() {
-				c = mockContainerWithLabels(map[string]string{})
+				c = MockContainer(WithLabels(map[string]string{}))
 				isWatchtower := c.IsWatchtower()
 				Expect(isWatchtower).To(BeFalse())
 			})
 		})
 		When("fetching the custom stop signal", func() {
 			It("should return the signal if its set", func() {
-				c = mockContainerWithLabels(map[string]string{
+				c = MockContainer(WithLabels(map[string]string{
 					"com.centurylinklabs.watchtower.stop-signal": "SIGKILL",
-				})
+				}))
 				stopSignal := c.StopSignal()
 				Expect(stopSignal).To(Equal("SIGKILL"))
 			})
 			It("should return an empty string if its not set", func() {
-				c = mockContainerWithLabels(map[string]string{})
+				c = MockContainer(WithLabels(map[string]string{}))
 				stopSignal := c.StopSignal()
 				Expect(stopSignal).To(Equal(""))
 			})
@@ -160,22 +239,22 @@ var _ = Describe("the container", func() {
 		When("fetching the image name", func() {
 			When("the zodiac label is present", func() {
 				It("should fetch the image name from it", func() {
-					c = mockContainerWithLabels(map[string]string{
+					c = MockContainer(WithLabels(map[string]string{
 						"com.centurylinklabs.zodiac.original-image": "the-original-image",
-					})
+					}))
 					imageName := c.ImageName()
 					Expect(imageName).To(Equal(imageName))
 				})
 			})
 			It("should return the image name", func() {
 				name := "image-name:3"
-				c = mockContainerWithImageName(name)
+				c = MockContainer(WithImageName(name))
 				imageName := c.ImageName()
 				Expect(imageName).To(Equal(name))
 			})
 			It("should assume latest if no tag is supplied", func() {
 				name := "image-name"
-				c = mockContainerWithImageName(name)
+				c = MockContainer(WithImageName(name))
 				imageName := c.ImageName()
 				Expect(imageName).To(Equal(name + ":latest"))
 			})
@@ -184,45 +263,123 @@ var _ = Describe("the container", func() {
 		When("fetching container links", func() {
 			When("the depends on label is present", func() {
 				It("should fetch depending containers from it", func() {
-					c = mockContainerWithLabels(map[string]string{
+					c = MockContainer(WithLabels(map[string]string{
 						"com.centurylinklabs.watchtower.depends-on": "postgres",
-					})
+					}))
 					links := c.Links()
-					Expect(links).To(SatisfyAll(ContainElement("postgres"), HaveLen(1)))
+					Expect(links).To(SatisfyAll(ContainElement("/postgres"), HaveLen(1)))
 				})
 				It("should fetch depending containers if there are many", func() {
-					c = mockContainerWithLabels(map[string]string{
+					c = MockContainer(WithLabels(map[string]string{
 						"com.centurylinklabs.watchtower.depends-on": "postgres,redis",
-					})
+					}))
 					links := c.Links()
-					Expect(links).To(SatisfyAll(ContainElement("postgres"), ContainElement("redis"), HaveLen(2)))
+					Expect(links).To(SatisfyAll(ContainElement("/postgres"), ContainElement("/redis"), HaveLen(2)))
+				})
+				It("should only add slashes to names when they are missing", func() {
+					c = MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.depends-on": "/postgres,redis",
+					}))
+					links := c.Links()
+					Expect(links).To(SatisfyAll(ContainElement("/postgres"), ContainElement("/redis")))
 				})
 				It("should fetch depending containers if label is blank", func() {
-					c = mockContainerWithLabels(map[string]string{
+					c = MockContainer(WithLabels(map[string]string{
 						"com.centurylinklabs.watchtower.depends-on": "",
-					})
+					}))
 					links := c.Links()
 					Expect(links).To(HaveLen(0))
 				})
 			})
 			When("the depends on label is not present", func() {
 				It("should fetch depending containers from host config links", func() {
-					c = mockContainerWithLinks([]string{
+					c = MockContainer(WithLinks([]string{
 						"redis:test-containrrr",
 						"postgres:test-containrrr",
-					})
+					}))
 					links := c.Links()
 					Expect(links).To(SatisfyAll(ContainElement("redis"), ContainElement("postgres"), HaveLen(2)))
 				})
 			})
 		})
 
+		When("checking no-pull label", func() {
+			When("no-pull argument is not set", func() {
+				When("no-pull label is true", func() {
+					c := MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.no-pull": "true",
+					}))
+					It("should return true", func() {
+						Expect(c.IsNoPull(types.UpdateParams{})).To(Equal(true))
+					})
+				})
+				When("no-pull label is false", func() {
+					c := MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.no-pull": "false",
+					}))
+					It("should return false", func() {
+						Expect(c.IsNoPull(types.UpdateParams{})).To(Equal(false))
+					})
+				})
+				When("no-pull label is set to an invalid value", func() {
+					c := MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.no-pull": "maybe",
+					}))
+					It("should return false", func() {
+						Expect(c.IsNoPull(types.UpdateParams{})).To(Equal(false))
+					})
+				})
+				When("no-pull label is unset", func() {
+					c = MockContainer(WithLabels(map[string]string{}))
+					It("should return false", func() {
+						Expect(c.IsNoPull(types.UpdateParams{})).To(Equal(false))
+					})
+				})
+			})
+			When("no-pull argument is set to true", func() {
+				When("no-pull label is true", func() {
+					c := MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.no-pull": "true",
+					}))
+					It("should return true", func() {
+						Expect(c.IsNoPull(types.UpdateParams{NoPull: true})).To(Equal(true))
+					})
+				})
+				When("no-pull label is false", func() {
+					c := MockContainer(WithLabels(map[string]string{
+						"com.centurylinklabs.watchtower.no-pull": "false",
+					}))
+					It("should return true", func() {
+						Expect(c.IsNoPull(types.UpdateParams{NoPull: true})).To(Equal(true))
+					})
+				})
+				When("label-take-precedence argument is set to true", func() {
+					When("no-pull label is true", func() {
+						c := MockContainer(WithLabels(map[string]string{
+							"com.centurylinklabs.watchtower.no-pull": "true",
+						}))
+						It("should return true", func() {
+							Expect(c.IsNoPull(types.UpdateParams{LabelPrecedence: true, NoPull: true})).To(Equal(true))
+						})
+					})
+					When("no-pull label is false", func() {
+						c := MockContainer(WithLabels(map[string]string{
+							"com.centurylinklabs.watchtower.no-pull": "false",
+						}))
+						It("should return false", func() {
+							Expect(c.IsNoPull(types.UpdateParams{LabelPrecedence: true, NoPull: true})).To(Equal(false))
+						})
+					})
+				})
+			})
+		})
+
 		When("there is a pre or post update timeout", func() {
 			It("should return minute values", func() {
-				c = mockContainerWithLabels(map[string]string{
+				c = MockContainer(WithLabels(map[string]string{
 					"com.centurylinklabs.watchtower.lifecycle.pre-update-timeout":  "3",
 					"com.centurylinklabs.watchtower.lifecycle.post-update-timeout": "5",
-				})
+				}))
 				preTimeout := c.PreUpdateTimeout()
 				Expect(preTimeout).To(Equal(3))
 				postTimeout := c.PostUpdateTimeout()
@@ -232,53 +389,3 @@ var _ = Describe("the container", func() {
 
 	})
 })
-
-func mockContainerWithPortBindings(portBindingSources ...string) *Container {
-	mockContainer := mockContainerWithLabels(nil)
-	mockContainer.imageInfo = &types.ImageInspect{}
-	hostConfig := &container.HostConfig{
-		PortBindings: nat.PortMap{},
-	}
-	for _, pbs := range portBindingSources {
-		hostConfig.PortBindings[nat.Port(pbs)] = []nat.PortBinding{}
-	}
-	mockContainer.containerInfo.HostConfig = hostConfig
-	return mockContainer
-}
-
-func mockContainerWithImageName(name string) *Container {
-	mockContainer := mockContainerWithLabels(nil)
-	mockContainer.containerInfo.Config.Image = name
-	return mockContainer
-}
-
-func mockContainerWithLinks(links []string) *Container {
-	content := types.ContainerJSON{
-		ContainerJSONBase: &types.ContainerJSONBase{
-			ID:    "container_id",
-			Image: "image",
-			Name:  "test-containrrr",
-			HostConfig: &container.HostConfig{
-				Links: links,
-			},
-		},
-		Config: &container.Config{
-			Labels: map[string]string{},
-		},
-	}
-	return NewContainer(&content, nil)
-}
-
-func mockContainerWithLabels(labels map[string]string) *Container {
-	content := types.ContainerJSON{
-		ContainerJSONBase: &types.ContainerJSONBase{
-			ID:    "container_id",
-			Image: "image",
-			Name:  "test-containrrr",
-		},
-		Config: &container.Config{
-			Labels: labels,
-		},
-	}
-	return NewContainer(&content, nil)
-}

pkg/container/errors.go

@@ -5,3 +5,4 @@ import "errors"
 var errorNoImageInfo = errors.New("no available image info")
 var errorNoContainerInfo = errors.New("no available container info")
 var errorInvalidConfig = errors.New("container configuration missing or invalid")
+var errorLabelNotFound = errors.New("label was not found in container")

pkg/container/metadata.go

@@ -1,10 +1,13 @@
 package container
 
+import "strconv"
+
 const (
 	watchtowerLabel        = "com.centurylinklabs.watchtower"
 	signalLabel            = "com.centurylinklabs.watchtower.stop-signal"
 	enableLabel            = "com.centurylinklabs.watchtower.enable"
 	monitorOnlyLabel       = "com.centurylinklabs.watchtower.monitor-only"
+	noPullLabel            = "com.centurylinklabs.watchtower.no-pull"
 	dependsOnLabel         = "com.centurylinklabs.watchtower.depends-on"
 	zodiacLabel            = "com.centurylinklabs.zodiac.original-image"
 	scope                  = "com.centurylinklabs.watchtower.scope"
@@ -54,3 +57,11 @@ func (c Container) getLabelValue(label string) (string, bool) {
 	val, ok := c.containerInfo.Config.Labels[label]
 	return val, ok
 }
+
+func (c Container) getBoolLabelValue(label string) (bool, error) {
+	if strVal, ok := c.containerInfo.Config.Labels[label]; ok {
+		value, err := strconv.ParseBool(strVal)
+		return value, err
+	}
+	return false, errorLabelNotFound
+}

pkg/container/mocks/ApiServer.go

@@ -3,22 +3,26 @@ package mocks
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/onsi/ginkgo"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+
+	t "github.com/containrrr/watchtower/pkg/types"
+
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
 	O "github.com/onsi/gomega"
 	"github.com/onsi/gomega/ghttp"
-	"io/ioutil"
-	"net/http"
-	"net/url"
-	"path/filepath"
 )
 
 func getMockJSONFile(relPath string) ([]byte, error) {
 	absPath, _ := filepath.Abs(relPath)
-	buf, err := ioutil.ReadFile(absPath)
+	buf, err := os.ReadFile(absPath)
 	if err != nil {
-		// logrus.WithError(err).WithField("file", absPath).Error(err)
-		return nil, err
+		return nil, fmt.Errorf("mock JSON file %q not found: %e", absPath, err)
 	}
 	return buf, nil
 }
@@ -39,19 +43,22 @@ func respondWithJSONFile(relPath string, statusCode int, optionalHeader ...http.
 }
 
 // GetContainerHandlers returns the handlers serving lookups for the supplied container mock files
-func GetContainerHandlers(containerFiles ...string) []http.HandlerFunc {
-	handlers := make([]http.HandlerFunc, 0, len(containerFiles)*2)
-	for _, file := range containerFiles {
-		handlers = append(handlers, getContainerHandler(file))
+func GetContainerHandlers(containerRefs ...*ContainerRef) []http.HandlerFunc {
+	handlers := make([]http.HandlerFunc, 0, len(containerRefs)*3)
+	for _, containerRef := range containerRefs {
+		handlers = append(handlers, getContainerFileHandler(containerRef))
+
+		// Also append any containers that the container references, if any
+		for _, ref := range containerRef.references {
+			handlers = append(handlers, getContainerFileHandler(ref))
+		}
 
 		// Also append the image request since that will be called for every container
-		if file == "running" {
-			// The "running" container is the only one using image02
-			handlers = append(handlers, getImageHandler(1))
-		} else {
-			handlers = append(handlers, getImageHandler(0))
-		}
+		handlers = append(handlers, getImageHandler(containerRef.image.id,
+			RespondWithJSONFile(containerRef.image.getFileName(), http.StatusOK),
+		))
 	}
+
 	return handlers
 }
 
@@ -63,34 +70,120 @@ func createFilterArgs(statuses []string) filters.Args {
 	return args
 }
 
-var containerFileIds = map[string]string{
-	"stopped":    "ae8964ba86c7cd7522cf84e09781343d88e0e3543281c747d88b27e246578b65",
-	"watchtower": "3d88e0e3543281c747d88b27e246578b65ae8964ba86c7cd7522cf84e0978134",
-	"running":    "b978af0b858aa8855cce46b628817d4ed58e58f2c4f66c9b9c5449134ed4c008",
-	"restarting": "ae8964ba86c7cd7522cf84e09781343d88e0e3543281c747d88b27e246578b67",
+var defaultImage = imageRef{
+	// watchtower
+	id:   t.ImageID("sha256:4dbc5f9c07028a985e14d1393e849ea07f68804c4293050d5a641b138db72daa"),
+	file: "default",
 }
 
-var imageIds = []string{
-	"sha256:4dbc5f9c07028a985e14d1393e849ea07f68804c4293050d5a641b138db72daa",
-	"sha256:19d07168491a3f9e2798a9bed96544e34d57ddc4757a4ac5bb199dea896c87fd",
+var Watchtower = ContainerRef{
+	name:  "watchtower",
+	id:    "3d88e0e3543281c747d88b27e246578b65ae8964ba86c7cd7522cf84e0978134",
+	image: &defaultImage,
+}
+var Stopped = ContainerRef{
+	name:  "stopped",
+	id:    "ae8964ba86c7cd7522cf84e09781343d88e0e3543281c747d88b27e246578b65",
+	image: &defaultImage,
+}
+var Running = ContainerRef{
+	name: "running",
+	id:   "b978af0b858aa8855cce46b628817d4ed58e58f2c4f66c9b9c5449134ed4c008",
+	image: &imageRef{
+		// portainer
+		id:   t.ImageID("sha256:19d07168491a3f9e2798a9bed96544e34d57ddc4757a4ac5bb199dea896c87fd"),
+		file: "running",
+	},
+}
+var Restarting = ContainerRef{
+	name:  "restarting",
+	id:    "ae8964ba86c7cd7522cf84e09781343d88e0e3543281c747d88b27e246578b67",
+	image: &defaultImage,
 }
 
-func getContainerHandler(file string) http.HandlerFunc {
-	id, ok := containerFileIds[file]
-	failTestUnless(ok)
-	return ghttp.CombineHandlers(
-		ghttp.VerifyRequest("GET", O.HaveSuffix("/containers/%v/json", id)),
-		RespondWithJSONFile(fmt.Sprintf("./mocks/data/container_%v.json", file), http.StatusOK),
+var netSupplierOK = ContainerRef{
+	id:   "25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2",
+	name: "net_supplier",
+	image: &imageRef{
+		// gluetun
+		id:   t.ImageID("sha256:c22b543d33bfdcb9992cbef23961677133cdf09da71d782468ae2517138bad51"),
+		file: "net_producer",
+	},
+}
+var netSupplierNotFound = ContainerRef{
+	id:        NetSupplierNotFoundID,
+	name:      netSupplierOK.name,
+	isMissing: true,
+}
+
+// NetConsumerOK is used for testing `container` networking mode
+// returns a container that consumes an existing supplier container
+var NetConsumerOK = ContainerRef{
+	id:   "1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6",
+	name: "net_consumer",
+	image: &imageRef{
+		id:   t.ImageID("sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8"), // nginx
+		file: "net_consumer",
+	},
+	references: []*ContainerRef{&netSupplierOK},
+}
+
+// NetConsumerInvalidSupplier is used for testing `container` networking mode
+// returns a container that references a supplying container that does not exist
+var NetConsumerInvalidSupplier = ContainerRef{
+	id:         NetConsumerOK.id,
+	name:       "net_consumer-missing_supplier",
+	image:      NetConsumerOK.image,
+	references: []*ContainerRef{&netSupplierNotFound},
+}
+
+const NetSupplierNotFoundID = "badc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc"
+const NetSupplierContainerName = "/wt-contnet-producer-1"
+
+func getContainerFileHandler(cr *ContainerRef) http.HandlerFunc {
+
+	if cr.isMissing {
+		return containerNotFoundResponse(string(cr.id))
+	}
+
+	containerFile, err := cr.getContainerFile()
+	if err != nil {
+		ginkgo.Fail(fmt.Sprintf("Failed to get container mock file: %v", err))
+	}
+
+	return getContainerHandler(
+		string(cr.id),
+		RespondWithJSONFile(containerFile, http.StatusOK),
 	)
 }
 
+func getContainerHandler(containerId string, responseHandler http.HandlerFunc) http.HandlerFunc {
+	return ghttp.CombineHandlers(
+		ghttp.VerifyRequest("GET", O.HaveSuffix("/containers/%v/json", containerId)),
+		responseHandler,
+	)
+}
+
+// GetContainerHandler mocks the GET containers/{id}/json endpoint
+func GetContainerHandler(containerID string, containerInfo *types.ContainerJSON) http.HandlerFunc {
+	responseHandler := containerNotFoundResponse(containerID)
+	if containerInfo != nil {
+		responseHandler = ghttp.RespondWithJSONEncoded(http.StatusOK, containerInfo)
+	}
+	return getContainerHandler(containerID, responseHandler)
+}
+
+// GetImageHandler mocks the GET images/{id}/json endpoint
+func GetImageHandler(imageInfo *types.ImageInspect) http.HandlerFunc {
+	return getImageHandler(t.ImageID(imageInfo.ID), ghttp.RespondWithJSONEncoded(http.StatusOK, imageInfo))
+}
+
 // ListContainersHandler mocks the GET containers/json endpoint, filtering the returned containers based on statuses
 func ListContainersHandler(statuses ...string) http.HandlerFunc {
 	filterArgs := createFilterArgs(statuses)
 	bytes, err := filterArgs.MarshalJSON()
 	O.ExpectWithOffset(1, err).ShouldNot(O.HaveOccurred())
 	query := url.Values{
-		"limit":   []string{"0"},
 		"filters": []string{string(bytes)},
 	}
 	return ghttp.CombineHandlers(
@@ -116,13 +209,72 @@ func respondWithFilteredContainers(filters filters.Args) http.HandlerFunc {
 	return ghttp.RespondWithJSONEncoded(http.StatusOK, filteredContainers)
 }
 
-func getImageHandler(index int) http.HandlerFunc {
+func getImageHandler(imageId t.ImageID, responseHandler http.HandlerFunc) http.HandlerFunc {
 	return ghttp.CombineHandlers(
-		ghttp.VerifyRequest("GET", O.HaveSuffix("/images/%v/json", imageIds[index])),
-		RespondWithJSONFile(fmt.Sprintf("./mocks/data/image%02d.json", index+1), http.StatusOK),
+		ghttp.VerifyRequest("GET", O.HaveSuffix("/images/%s/json", imageId)),
+		responseHandler,
 	)
 }
 
-func failTestUnless(ok bool) {
-	O.ExpectWithOffset(2, ok).To(O.BeTrue(), "test setup failed")
+// KillContainerHandler mocks the POST containers/{id}/kill endpoint
+func KillContainerHandler(containerID string, found FoundStatus) http.HandlerFunc {
+	responseHandler := noContentStatusResponse
+	if !found {
+		responseHandler = containerNotFoundResponse(containerID)
+	}
+	return ghttp.CombineHandlers(
+		ghttp.VerifyRequest("POST", O.HaveSuffix("containers/%s/kill", containerID)),
+		responseHandler,
+	)
+}
+
+// RemoveContainerHandler mocks the DELETE containers/{id} endpoint
+func RemoveContainerHandler(containerID string, found FoundStatus) http.HandlerFunc {
+	responseHandler := noContentStatusResponse
+	if !found {
+		responseHandler = containerNotFoundResponse(containerID)
+	}
+	return ghttp.CombineHandlers(
+		ghttp.VerifyRequest("DELETE", O.HaveSuffix("containers/%s", containerID)),
+		responseHandler,
+	)
+}
+
+func containerNotFoundResponse(containerID string) http.HandlerFunc {
+	return ghttp.RespondWithJSONEncoded(http.StatusNotFound, struct{ message string }{message: "No such container: " + string(containerID)})
+}
+
+var noContentStatusResponse = ghttp.RespondWith(http.StatusNoContent, nil)
+
+type FoundStatus bool
+
+const (
+	Found   FoundStatus = true
+	Missing FoundStatus = false
+)
+
+// RemoveImageHandler mocks the DELETE images/ID endpoint, simulating removal of the given imagesWithParents
+func RemoveImageHandler(imagesWithParents map[string][]string) http.HandlerFunc {
+	return ghttp.CombineHandlers(
+		ghttp.VerifyRequest("DELETE", O.MatchRegexp("/images/.*")),
+		func(w http.ResponseWriter, r *http.Request) {
+			parts := strings.Split(r.URL.Path, `/`)
+			image := parts[len(parts)-1]
+
+			if parents, found := imagesWithParents[image]; found {
+				items := []types.ImageDeleteResponseItem{
+					{Untagged: image},
+					{Deleted: image},
+				}
+				for _, parent := range parents {
+					items = append(items, types.ImageDeleteResponseItem{Deleted: parent})
+				}
+				ghttp.RespondWithJSONEncoded(http.StatusOK, items)(w, r)
+			} else {
+				ghttp.RespondWithJSONEncoded(http.StatusNotFound, struct{ message string }{
+					message: "Something went wrong.",
+				})(w, r)
+			}
+		},
+	)
 }

pkg/container/mocks/container_ref.go

@@ -0,0 +1,42 @@
+package mocks
+
+import (
+	"fmt"
+	"os"
+
+	t "github.com/containrrr/watchtower/pkg/types"
+)
+
+type imageRef struct {
+	id   t.ImageID
+	file string
+}
+
+func (ir *imageRef) getFileName() string {
+	return fmt.Sprintf("./mocks/data/image_%v.json", ir.file)
+}
+
+type ContainerRef struct {
+	name       string
+	id         t.ContainerID
+	image      *imageRef
+	file       string
+	references []*ContainerRef
+	isMissing  bool
+}
+
+func (cr *ContainerRef) getContainerFile() (containerFile string, err error) {
+	file := cr.file
+	if file == "" {
+		file = cr.name
+	}
+
+	containerFile = fmt.Sprintf("./mocks/data/container_%v.json", file)
+	_, err = os.Stat(containerFile)
+
+	return containerFile, err
+}
+
+func (cr *ContainerRef) ContainerID() t.ContainerID {
+	return cr.id
+}

pkg/container/mocks/data/container_net_consumer-missing_supplier.json

@@ -0,0 +1,205 @@
+{
+  "Id": "1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6",
+  "Created": "2023-07-25T14:55:14.69155887Z",
+  "Path": "/docker-entrypoint.sh",
+  "Args": [
+    "nginx",
+    "-g",
+    "daemon off;"
+  ],
+  "State": {
+    "Status": "running",
+    "Running": true,
+    "Paused": false,
+    "Restarting": false,
+    "OOMKilled": false,
+    "Dead": false,
+    "Pid": 3743,
+    "ExitCode": 0,
+    "Error": "",
+    "StartedAt": "2023-07-25T14:55:15.299654437Z",
+    "FinishedAt": "0001-01-01T00:00:00Z"
+  },
+  "Image": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
+  "ResolvConfPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/resolv.conf",
+  "HostnamePath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hostname",
+  "HostsPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hosts",
+  "LogPath": "/var/lib/docker/containers/1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6/1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6-json.log",
+  "Name": "/wt-contnet-consumer-1",
+  "RestartCount": 0,
+  "Driver": "overlay2",
+  "Platform": "linux",
+  "MountLabel": "",
+  "ProcessLabel": "",
+  "AppArmorProfile": "",
+  "ExecIDs": null,
+  "HostConfig": {
+    "Binds": null,
+    "ContainerIDFile": "",
+    "LogConfig": {
+      "Type": "json-file",
+      "Config": {}
+    },
+    "NetworkMode": "container:badc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc1dbadc",
+    "PortBindings": {},
+    "RestartPolicy": {
+      "Name": "",
+      "MaximumRetryCount": 0
+    },
+    "AutoRemove": false,
+    "VolumeDriver": "",
+    "VolumesFrom": null,
+    "ConsoleSize": [
+      0,
+      0
+    ],
+    "CapAdd": null,
+    "CapDrop": null,
+    "CgroupnsMode": "host",
+    "Dns": null,
+    "DnsOptions": null,
+    "DnsSearch": null,
+    "ExtraHosts": [],
+    "GroupAdd": null,
+    "IpcMode": "private",
+    "Cgroup": "",
+    "Links": null,
+    "OomScoreAdj": 0,
+    "PidMode": "",
+    "Privileged": false,
+    "PublishAllPorts": false,
+    "ReadonlyRootfs": false,
+    "SecurityOpt": null,
+    "UTSMode": "",
+    "UsernsMode": "",
+    "ShmSize": 67108864,
+    "Runtime": "runc",
+    "Isolation": "",
+    "CpuShares": 0,
+    "Memory": 0,
+    "NanoCpus": 0,
+    "CgroupParent": "",
+    "BlkioWeight": 0,
+    "BlkioWeightDevice": null,
+    "BlkioDeviceReadBps": null,
+    "BlkioDeviceWriteBps": null,
+    "BlkioDeviceReadIOps": null,
+    "BlkioDeviceWriteIOps": null,
+    "CpuPeriod": 0,
+    "CpuQuota": 0,
+    "CpuRealtimePeriod": 0,
+    "CpuRealtimeRuntime": 0,
+    "CpusetCpus": "",
+    "CpusetMems": "",
+    "Devices": null,
+    "DeviceCgroupRules": null,
+    "DeviceRequests": null,
+    "MemoryReservation": 0,
+    "MemorySwap": 0,
+    "MemorySwappiness": null,
+    "OomKillDisable": false,
+    "PidsLimit": null,
+    "Ulimits": null,
+    "CpuCount": 0,
+    "CpuPercent": 0,
+    "IOMaximumIOps": 0,
+    "IOMaximumBandwidth": 0,
+    "MaskedPaths": [
+      "/proc/asound",
+      "/proc/acpi",
+      "/proc/kcore",
+      "/proc/keys",
+      "/proc/latency_stats",
+      "/proc/timer_list",
+      "/proc/timer_stats",
+      "/proc/sched_debug",
+      "/proc/scsi",
+      "/sys/firmware"
+    ],
+    "ReadonlyPaths": [
+      "/proc/bus",
+      "/proc/fs",
+      "/proc/irq",
+      "/proc/sys",
+      "/proc/sysrq-trigger"
+    ]
+  },
+  "GraphDriver": {
+    "Data": {
+      "LowerDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2-init/diff:/var/lib/docker/overlay2/105427179e5628eb7e893d53e21f42f9e76278f8b5665387ecdeed54a7231137/diff:/var/lib/docker/overlay2/09785ba17f27c783ef8b44f369f9aac0ca936000b57abf22b3c54d1e6eb8e27b/diff:/var/lib/docker/overlay2/6f8acd64ae44fd4d14bcb90c105eceba46854aa3985b5b6b317bcc5692cfc286/diff:/var/lib/docker/overlay2/73d41c15edb21c5f12cf53e313f48b5da55283aafc77d35b7bc662241879d7e7/diff:/var/lib/docker/overlay2/d97b55f3d966ae031492369a98e9e00d2bd31e520290fe2034e0a2b1ed77c91e/diff:/var/lib/docker/overlay2/053e9ca65c6b64cb9d98a812ff7488c7e77938b4fb8e0c4d2ad7f8ec235f0f20/diff",
+      "MergedDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/merged",
+      "UpperDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/diff",
+      "WorkDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/work"
+    },
+    "Name": "overlay2"
+  },
+  "Mounts": [],
+  "Config": {
+    "Hostname": "25e75393800b",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": true,
+    "AttachStderr": true,
+    "ExposedPorts": {
+      "80/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "NGINX_VERSION=1.23.3",
+      "NJS_VERSION=0.7.9",
+      "PKG_RELEASE=1~bullseye"
+    ],
+    "Cmd": [
+      "nginx",
+      "-g",
+      "daemon off;"
+    ],
+    "Image": "nginx",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/docker-entrypoint.sh"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "com.docker.compose.config-hash": "8bb0e1c8c61f6d495840ba9133ebfb1e4ffda3e1adb701a011b03951848bb9fa",
+      "com.docker.compose.container-number": "1",
+      "com.docker.compose.depends_on": "producer:service_started:false",
+      "com.docker.compose.image": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
+      "com.docker.compose.oneoff": "False",
+      "com.docker.compose.project": "wt-contnet",
+      "com.docker.compose.project.config_files": "/tmp/wt-contnet/docker-compose.yaml",
+      "com.docker.compose.project.working_dir": "/tmp/wt-contnet",
+      "com.docker.compose.replace": "07bb70608f96f577aa02b9f317500e23e691c94eb099f6fb52301dfb031d0668",
+      "com.docker.compose.service": "consumer",
+      "com.docker.compose.version": "2.19.1",
+      "desktop.docker.io/wsl-distro": "Ubuntu",
+      "maintainer": "NGINX Docker Maintainers \u003cdocker-maint@nginx.com\u003e"
+    },
+    "StopSignal": "SIGQUIT"
+  },
+  "NetworkSettings": {
+    "Bridge": "",
+    "SandboxID": "",
+    "HairpinMode": false,
+    "LinkLocalIPv6Address": "",
+    "LinkLocalIPv6PrefixLen": 0,
+    "Ports": {},
+    "SandboxKey": "",
+    "SecondaryIPAddresses": null,
+    "SecondaryIPv6Addresses": null,
+    "EndpointID": "",
+    "Gateway": "",
+    "GlobalIPv6Address": "",
+    "GlobalIPv6PrefixLen": 0,
+    "IPAddress": "",
+    "IPPrefixLen": 0,
+    "IPv6Gateway": "",
+    "MacAddress": "",
+    "Networks": {}
+  }
+}

pkg/container/mocks/data/container_net_consumer.json

@@ -0,0 +1,205 @@
+{
+  "Id": "1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6",
+  "Created": "2023-07-25T14:55:14.69155887Z",
+  "Path": "/docker-entrypoint.sh",
+  "Args": [
+    "nginx",
+    "-g",
+    "daemon off;"
+  ],
+  "State": {
+    "Status": "running",
+    "Running": true,
+    "Paused": false,
+    "Restarting": false,
+    "OOMKilled": false,
+    "Dead": false,
+    "Pid": 3743,
+    "ExitCode": 0,
+    "Error": "",
+    "StartedAt": "2023-07-25T14:55:15.299654437Z",
+    "FinishedAt": "0001-01-01T00:00:00Z"
+  },
+  "Image": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
+  "ResolvConfPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/resolv.conf",
+  "HostnamePath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hostname",
+  "HostsPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hosts",
+  "LogPath": "/var/lib/docker/containers/1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6/1f6b79d2aff23244382026c76f4995851322bed5f9c50631620162f6f9aafbd6-json.log",
+  "Name": "/wt-contnet-consumer-1",
+  "RestartCount": 0,
+  "Driver": "overlay2",
+  "Platform": "linux",
+  "MountLabel": "",
+  "ProcessLabel": "",
+  "AppArmorProfile": "",
+  "ExecIDs": null,
+  "HostConfig": {
+    "Binds": null,
+    "ContainerIDFile": "",
+    "LogConfig": {
+      "Type": "json-file",
+      "Config": {}
+    },
+    "NetworkMode": "container:25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2",
+    "PortBindings": {},
+    "RestartPolicy": {
+      "Name": "",
+      "MaximumRetryCount": 0
+    },
+    "AutoRemove": false,
+    "VolumeDriver": "",
+    "VolumesFrom": null,
+    "ConsoleSize": [
+      0,
+      0
+    ],
+    "CapAdd": null,
+    "CapDrop": null,
+    "CgroupnsMode": "host",
+    "Dns": null,
+    "DnsOptions": null,
+    "DnsSearch": null,
+    "ExtraHosts": [],
+    "GroupAdd": null,
+    "IpcMode": "private",
+    "Cgroup": "",
+    "Links": null,
+    "OomScoreAdj": 0,
+    "PidMode": "",
+    "Privileged": false,
+    "PublishAllPorts": false,
+    "ReadonlyRootfs": false,
+    "SecurityOpt": null,
+    "UTSMode": "",
+    "UsernsMode": "",
+    "ShmSize": 67108864,
+    "Runtime": "runc",
+    "Isolation": "",
+    "CpuShares": 0,
+    "Memory": 0,
+    "NanoCpus": 0,
+    "CgroupParent": "",
+    "BlkioWeight": 0,
+    "BlkioWeightDevice": null,
+    "BlkioDeviceReadBps": null,
+    "BlkioDeviceWriteBps": null,
+    "BlkioDeviceReadIOps": null,
+    "BlkioDeviceWriteIOps": null,
+    "CpuPeriod": 0,
+    "CpuQuota": 0,
+    "CpuRealtimePeriod": 0,
+    "CpuRealtimeRuntime": 0,
+    "CpusetCpus": "",
+    "CpusetMems": "",
+    "Devices": null,
+    "DeviceCgroupRules": null,
+    "DeviceRequests": null,
+    "MemoryReservation": 0,
+    "MemorySwap": 0,
+    "MemorySwappiness": null,
+    "OomKillDisable": false,
+    "PidsLimit": null,
+    "Ulimits": null,
+    "CpuCount": 0,
+    "CpuPercent": 0,
+    "IOMaximumIOps": 0,
+    "IOMaximumBandwidth": 0,
+    "MaskedPaths": [
+      "/proc/asound",
+      "/proc/acpi",
+      "/proc/kcore",
+      "/proc/keys",
+      "/proc/latency_stats",
+      "/proc/timer_list",
+      "/proc/timer_stats",
+      "/proc/sched_debug",
+      "/proc/scsi",
+      "/sys/firmware"
+    ],
+    "ReadonlyPaths": [
+      "/proc/bus",
+      "/proc/fs",
+      "/proc/irq",
+      "/proc/sys",
+      "/proc/sysrq-trigger"
+    ]
+  },
+  "GraphDriver": {
+    "Data": {
+      "LowerDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2-init/diff:/var/lib/docker/overlay2/105427179e5628eb7e893d53e21f42f9e76278f8b5665387ecdeed54a7231137/diff:/var/lib/docker/overlay2/09785ba17f27c783ef8b44f369f9aac0ca936000b57abf22b3c54d1e6eb8e27b/diff:/var/lib/docker/overlay2/6f8acd64ae44fd4d14bcb90c105eceba46854aa3985b5b6b317bcc5692cfc286/diff:/var/lib/docker/overlay2/73d41c15edb21c5f12cf53e313f48b5da55283aafc77d35b7bc662241879d7e7/diff:/var/lib/docker/overlay2/d97b55f3d966ae031492369a98e9e00d2bd31e520290fe2034e0a2b1ed77c91e/diff:/var/lib/docker/overlay2/053e9ca65c6b64cb9d98a812ff7488c7e77938b4fb8e0c4d2ad7f8ec235f0f20/diff",
+      "MergedDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/merged",
+      "UpperDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/diff",
+      "WorkDir": "/var/lib/docker/overlay2/05501c86219af9f713c74c129426cf5a17dc5e42f96f7f881f443cab100280e2/work"
+    },
+    "Name": "overlay2"
+  },
+  "Mounts": [],
+  "Config": {
+    "Hostname": "25e75393800b",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": true,
+    "AttachStderr": true,
+    "ExposedPorts": {
+      "80/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "NGINX_VERSION=1.23.3",
+      "NJS_VERSION=0.7.9",
+      "PKG_RELEASE=1~bullseye"
+    ],
+    "Cmd": [
+      "nginx",
+      "-g",
+      "daemon off;"
+    ],
+    "Image": "nginx",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/docker-entrypoint.sh"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "com.docker.compose.config-hash": "8bb0e1c8c61f6d495840ba9133ebfb1e4ffda3e1adb701a011b03951848bb9fa",
+      "com.docker.compose.container-number": "1",
+      "com.docker.compose.depends_on": "producer:service_started:false",
+      "com.docker.compose.image": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
+      "com.docker.compose.oneoff": "False",
+      "com.docker.compose.project": "wt-contnet",
+      "com.docker.compose.project.config_files": "/tmp/wt-contnet/docker-compose.yaml",
+      "com.docker.compose.project.working_dir": "/tmp/wt-contnet",
+      "com.docker.compose.replace": "07bb70608f96f577aa02b9f317500e23e691c94eb099f6fb52301dfb031d0668",
+      "com.docker.compose.service": "consumer",
+      "com.docker.compose.version": "2.19.1",
+      "desktop.docker.io/wsl-distro": "Ubuntu",
+      "maintainer": "NGINX Docker Maintainers \u003cdocker-maint@nginx.com\u003e"
+    },
+    "StopSignal": "SIGQUIT"
+  },
+  "NetworkSettings": {
+    "Bridge": "",
+    "SandboxID": "",
+    "HairpinMode": false,
+    "LinkLocalIPv6Address": "",
+    "LinkLocalIPv6PrefixLen": 0,
+    "Ports": {},
+    "SandboxKey": "",
+    "SecondaryIPAddresses": null,
+    "SecondaryIPv6Addresses": null,
+    "EndpointID": "",
+    "Gateway": "",
+    "GlobalIPv6Address": "",
+    "GlobalIPv6PrefixLen": 0,
+    "IPAddress": "",
+    "IPPrefixLen": 0,
+    "IPv6Gateway": "",
+    "MacAddress": "",
+    "Networks": {}
+  }
+}

pkg/container/mocks/data/container_net_supplier.json

@@ -0,0 +1,380 @@
+{
+  "Id": "25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2",
+  "Created": "2023-07-25T14:55:14.595662628Z",
+  "Path": "/gluetun-entrypoint",
+  "Args": [],
+  "State": {
+    "Status": "running",
+    "Running": true,
+    "Paused": false,
+    "Restarting": false,
+    "OOMKilled": false,
+    "Dead": false,
+    "Pid": 3648,
+    "ExitCode": 0,
+    "Error": "",
+    "StartedAt": "2023-07-25T14:55:15.193430103Z",
+    "FinishedAt": "0001-01-01T00:00:00Z",
+    "Health": {
+      "Status": "healthy",
+      "FailingStreak": 0,
+      "Log": [
+        {
+          "Start": "2023-07-25T15:00:32.078491228Z",
+          "End": "2023-07-25T15:00:32.194554876Z",
+          "ExitCode": 0,
+          "Output": ""
+        },
+        {
+          "Start": "2023-07-25T15:00:37.199245496Z",
+          "End": "2023-07-25T15:00:37.294845687Z",
+          "ExitCode": 0,
+          "Output": ""
+        },
+        {
+          "Start": "2023-07-25T15:00:42.299676089Z",
+          "End": "2023-07-25T15:00:42.384213818Z",
+          "ExitCode": 0,
+          "Output": ""
+        },
+        {
+          "Start": "2023-07-25T15:00:47.389142447Z",
+          "End": "2023-07-25T15:00:47.514483294Z",
+          "ExitCode": 0,
+          "Output": ""
+        },
+        {
+          "Start": "2023-07-25T15:00:52.518770886Z",
+          "End": "2023-07-25T15:00:52.644288742Z",
+          "ExitCode": 0,
+          "Output": ""
+        }
+      ]
+    }
+  },
+  "Image": "sha256:c22b543d33bfdcb9992cbef23961677133cdf09da71d782468ae2517138bad51",
+  "ResolvConfPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/resolv.conf",
+  "HostnamePath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hostname",
+  "HostsPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/hosts",
+  "LogPath": "/var/lib/docker/containers/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2/25e75393800b5c450a6841212a3b92ed28fa35414a586dec9f2c8a520d4910c2-json.log",
+  "Name": "/wt-contnet-producer-1",
+  "RestartCount": 0,
+  "Driver": "overlay2",
+  "Platform": "linux",
+  "MountLabel": "",
+  "ProcessLabel": "",
+  "AppArmorProfile": "",
+  "ExecIDs": null,
+  "HostConfig": {
+    "Binds": null,
+    "ContainerIDFile": "",
+    "LogConfig": {
+      "Type": "json-file",
+      "Config": {}
+    },
+    "NetworkMode": "wt-contnet_default",
+    "PortBindings": {},
+    "RestartPolicy": {
+      "Name": "",
+      "MaximumRetryCount": 0
+    },
+    "AutoRemove": false,
+    "VolumeDriver": "",
+    "VolumesFrom": null,
+    "ConsoleSize": [
+      0,
+      0
+    ],
+    "CapAdd": [
+      "NET_ADMIN"
+    ],
+    "CapDrop": null,
+    "CgroupnsMode": "host",
+    "Dns": null,
+    "DnsOptions": null,
+    "DnsSearch": null,
+    "ExtraHosts": [],
+    "GroupAdd": null,
+    "IpcMode": "private",
+    "Cgroup": "",
+    "Links": null,
+    "OomScoreAdj": 0,
+    "PidMode": "",
+    "Privileged": false,
+    "PublishAllPorts": false,
+    "ReadonlyRootfs": false,
+    "SecurityOpt": null,
+    "UTSMode": "",
+    "UsernsMode": "",
+    "ShmSize": 67108864,
+    "Runtime": "runc",
+    "Isolation": "",
+    "CpuShares": 0,
+    "Memory": 0,
+    "NanoCpus": 0,
+    "CgroupParent": "",
+    "BlkioWeight": 0,
+    "BlkioWeightDevice": null,
+    "BlkioDeviceReadBps": null,
+    "BlkioDeviceWriteBps": null,
+    "BlkioDeviceReadIOps": null,
+    "BlkioDeviceWriteIOps": null,
+    "CpuPeriod": 0,
+    "CpuQuota": 0,
+    "CpuRealtimePeriod": 0,
+    "CpuRealtimeRuntime": 0,
+    "CpusetCpus": "",
+    "CpusetMems": "",
+    "Devices": null,
+    "DeviceCgroupRules": null,
+    "DeviceRequests": null,
+    "MemoryReservation": 0,
+    "MemorySwap": 0,
+    "MemorySwappiness": null,
+    "OomKillDisable": false,
+    "PidsLimit": null,
+    "Ulimits": null,
+    "CpuCount": 0,
+    "CpuPercent": 0,
+    "IOMaximumIOps": 0,
+    "IOMaximumBandwidth": 0,
+    "MaskedPaths": [
+      "/proc/asound",
+      "/proc/acpi",
+      "/proc/kcore",
+      "/proc/keys",
+      "/proc/latency_stats",
+      "/proc/timer_list",
+      "/proc/timer_stats",
+      "/proc/sched_debug",
+      "/proc/scsi",
+      "/sys/firmware"
+    ],
+    "ReadonlyPaths": [
+      "/proc/bus",
+      "/proc/fs",
+      "/proc/irq",
+      "/proc/sys",
+      "/proc/sysrq-trigger"
+    ]
+  },
+  "GraphDriver": {
+    "Data": {
+      "LowerDir": "/var/lib/docker/overlay2/618bd1e7a13880c07ec7f5bfc45012a9f81d5de452f942b49d8f49b3c67a19a2-init/diff:/var/lib/docker/overlay2/0d222a3aa067159831c4111a408e40325be1085b935c98d39c2e9a01ff50b224/diff:/var/lib/docker/overlay2/a20c9490a23ee8af51898892d9bf32258d44e0e07f3799475be8e8f273a50f73/diff:/var/lib/docker/overlay2/d4c97f367c37c6ada9de57f438a3e19cc714be2a54a6f582a03de9e42d88b344/diff",
+      "MergedDir": "/var/lib/docker/overlay2/618bd1e7a13880c07ec7f5bfc45012a9f81d5de452f942b49d8f49b3c67a19a2/merged",
+      "UpperDir": "/var/lib/docker/overlay2/618bd1e7a13880c07ec7f5bfc45012a9f81d5de452f942b49d8f49b3c67a19a2/diff",
+      "WorkDir": "/var/lib/docker/overlay2/618bd1e7a13880c07ec7f5bfc45012a9f81d5de452f942b49d8f49b3c67a19a2/work"
+    },
+    "Name": "overlay2"
+  },
+  "Mounts": [],
+  "Config": {
+    "Hostname": "25e75393800b",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": true,
+    "AttachStderr": true,
+    "ExposedPorts": {
+      "8000/tcp": {},
+      "8388/tcp": {},
+      "8388/udp": {},
+      "8888/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "OPENVPN_PASSWORD=",
+      "SERVER_COUNTRIES=Sweden",
+      "VPN_SERVICE_PROVIDER=nordvpn",
+      "OPENVPN_USER=",
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "VPN_TYPE=openvpn",
+      "VPN_ENDPOINT_IP=",
+      "VPN_ENDPOINT_PORT=",
+      "VPN_INTERFACE=tun0",
+      "OPENVPN_PROTOCOL=udp",
+      "OPENVPN_USER_SECRETFILE=/run/secrets/openvpn_user",
+      "OPENVPN_PASSWORD_SECRETFILE=/run/secrets/openvpn_password",
+      "OPENVPN_VERSION=2.5",
+      "OPENVPN_VERBOSITY=1",
+      "OPENVPN_FLAGS=",
+      "OPENVPN_CIPHERS=",
+      "OPENVPN_AUTH=",
+      "OPENVPN_PROCESS_USER=root",
+      "OPENVPN_CUSTOM_CONFIG=",
+      "WIREGUARD_PRIVATE_KEY=",
+      "WIREGUARD_PRESHARED_KEY=",
+      "WIREGUARD_PUBLIC_KEY=",
+      "WIREGUARD_ALLOWED_IPS=",
+      "WIREGUARD_ADDRESSES=",
+      "WIREGUARD_MTU=1400",
+      "WIREGUARD_IMPLEMENTATION=auto",
+      "SERVER_REGIONS=",
+      "SERVER_CITIES=",
+      "SERVER_HOSTNAMES=",
+      "ISP=",
+      "OWNED_ONLY=no",
+      "PRIVATE_INTERNET_ACCESS_OPENVPN_ENCRYPTION_PRESET=",
+      "VPN_PORT_FORWARDING=off",
+      "VPN_PORT_FORWARDING_PROVIDER=",
+      "VPN_PORT_FORWARDING_STATUS_FILE=/tmp/gluetun/forwarded_port",
+      "OPENVPN_CERT=",
+      "OPENVPN_KEY=",
+      "OPENVPN_CLIENTCRT_SECRETFILE=/run/secrets/openvpn_clientcrt",
+      "OPENVPN_CLIENTKEY_SECRETFILE=/run/secrets/openvpn_clientkey",
+      "OPENVPN_ENCRYPTED_KEY=",
+      "OPENVPN_ENCRYPTED_KEY_SECRETFILE=/run/secrets/openvpn_encrypted_key",
+      "OPENVPN_KEY_PASSPHRASE=",
+      "OPENVPN_KEY_PASSPHRASE_SECRETFILE=/run/secrets/openvpn_key_passphrase",
+      "SERVER_NUMBER=",
+      "SERVER_NAMES=",
+      "FREE_ONLY=",
+      "MULTIHOP_ONLY=",
+      "PREMIUM_ONLY=",
+      "FIREWALL=on",
+      "FIREWALL_VPN_INPUT_PORTS=",
+      "FIREWALL_INPUT_PORTS=",
+      "FIREWALL_OUTBOUND_SUBNETS=",
+      "FIREWALL_DEBUG=off",
+      "LOG_LEVEL=info",
+      "HEALTH_SERVER_ADDRESS=127.0.0.1:9999",
+      "HEALTH_TARGET_ADDRESS=cloudflare.com:443",
+      "HEALTH_SUCCESS_WAIT_DURATION=5s",
+      "HEALTH_VPN_DURATION_INITIAL=6s",
+      "HEALTH_VPN_DURATION_ADDITION=5s",
+      "DOT=on",
+      "DOT_PROVIDERS=cloudflare",
+      "DOT_PRIVATE_ADDRESS=127.0.0.1/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,169.254.0.0/16,::1/128,fc00::/7,fe80::/10,::ffff:7f00:1/104,::ffff:a00:0/104,::ffff:a9fe:0/112,::ffff:ac10:0/108,::ffff:c0a8:0/112",
+      "DOT_VERBOSITY=1",
+      "DOT_VERBOSITY_DETAILS=0",
+      "DOT_VALIDATION_LOGLEVEL=0",
+      "DOT_CACHING=on",
+      "DOT_IPV6=off",
+      "BLOCK_MALICIOUS=on",
+      "BLOCK_SURVEILLANCE=off",
+      "BLOCK_ADS=off",
+      "UNBLOCK=",
+      "DNS_UPDATE_PERIOD=24h",
+      "DNS_ADDRESS=127.0.0.1",
+      "DNS_KEEP_NAMESERVER=off",
+      "HTTPPROXY=",
+      "HTTPPROXY_LOG=off",
+      "HTTPPROXY_LISTENING_ADDRESS=:8888",
+      "HTTPPROXY_STEALTH=off",
+      "HTTPPROXY_USER=",
+      "HTTPPROXY_PASSWORD=",
+      "HTTPPROXY_USER_SECRETFILE=/run/secrets/httpproxy_user",
+      "HTTPPROXY_PASSWORD_SECRETFILE=/run/secrets/httpproxy_password",
+      "SHADOWSOCKS=off",
+      "SHADOWSOCKS_LOG=off",
+      "SHADOWSOCKS_LISTENING_ADDRESS=:8388",
+      "SHADOWSOCKS_PASSWORD=",
+      "SHADOWSOCKS_PASSWORD_SECRETFILE=/run/secrets/shadowsocks_password",
+      "SHADOWSOCKS_CIPHER=chacha20-ietf-poly1305",
+      "HTTP_CONTROL_SERVER_LOG=on",
+      "HTTP_CONTROL_SERVER_ADDRESS=:8000",
+      "UPDATER_PERIOD=0",
+      "UPDATER_MIN_RATIO=0.8",
+      "UPDATER_VPN_SERVICE_PROVIDERS=",
+      "PUBLICIP_FILE=/tmp/gluetun/ip",
+      "PUBLICIP_PERIOD=12h",
+      "PPROF_ENABLED=no",
+      "PPROF_BLOCK_PROFILE_RATE=0",
+      "PPROF_MUTEX_PROFILE_RATE=0",
+      "PPROF_HTTP_SERVER_ADDRESS=:6060",
+      "VERSION_INFORMATION=on",
+      "TZ=",
+      "PUID=",
+      "PGID="
+    ],
+    "Cmd": null,
+    "Healthcheck": {
+      "Test": [
+        "CMD-SHELL",
+        "/gluetun-entrypoint healthcheck"
+      ],
+      "Interval": 5000000000,
+      "Timeout": 5000000000,
+      "StartPeriod": 10000000000,
+      "Retries": 1
+    },
+    "Image": "qmcgaw/gluetun",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/gluetun-entrypoint"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "com.docker.compose.config-hash": "6dc7dc42a86edb47039de3650a9cb9bdcf4866c113b8f9d797722c9dfd20428b",
+      "com.docker.compose.container-number": "1",
+      "com.docker.compose.depends_on": "",
+      "com.docker.compose.image": "sha256:c22b543d33bfdcb9992cbef23961677133cdf09da71d782468ae2517138bad51",
+      "com.docker.compose.oneoff": "False",
+      "com.docker.compose.project": "wt-contnet",
+      "com.docker.compose.project.config_files": "/tmp/wt-contnet/docker-compose.yaml",
+      "com.docker.compose.project.working_dir": "/tmp/wt-contnet",
+      "com.docker.compose.replace": "9bd1ce000be81819fc915aa60a1674c7573b59a26ac4643ecf427a5732b9785f",
+      "com.docker.compose.service": "producer",
+      "com.docker.compose.version": "2.19.1",
+      "desktop.docker.io/wsl-distro": "Ubuntu",
+      "org.opencontainers.image.authors": "quentin.mcgaw@gmail.com",
+      "org.opencontainers.image.created": "2023-07-22T16:07:05.641Z",
+      "org.opencontainers.image.description": "VPN client in a thin Docker container for multiple VPN providers, written in Go, and using OpenVPN or Wireguard, DNS over TLS, with a few proxy servers built-in.",
+      "org.opencontainers.image.documentation": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.licenses": "MIT",
+      "org.opencontainers.image.revision": "eecfb3952f202c0de3867d88e96d80c6b0f48359",
+      "org.opencontainers.image.source": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.title": "gluetun",
+      "org.opencontainers.image.url": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.version": "latest"
+    }
+  },
+  "NetworkSettings": {
+    "Bridge": "",
+    "SandboxID": "34a321b64bb1b15f994dfccff0e235f881504f240c2028876ff6683962eaa10e",
+    "HairpinMode": false,
+    "LinkLocalIPv6Address": "",
+    "LinkLocalIPv6PrefixLen": 0,
+    "Ports": {
+      "8000/tcp": null,
+      "8388/tcp": null,
+      "8388/udp": null,
+      "8888/tcp": null
+    },
+    "SandboxKey": "/var/run/docker/netns/34a321b64bb1",
+    "SecondaryIPAddresses": null,
+    "SecondaryIPv6Addresses": null,
+    "EndpointID": "",
+    "Gateway": "",
+    "GlobalIPv6Address": "",
+    "GlobalIPv6PrefixLen": 0,
+    "IPAddress": "",
+    "IPPrefixLen": 0,
+    "IPv6Gateway": "",
+    "MacAddress": "",
+    "Networks": {
+      "wt-contnet_default": {
+        "IPAMConfig": null,
+        "Links": null,
+        "Aliases": [
+          "wt-contnet-producer-1",
+          "producer",
+          "25e75393800b"
+        ],
+        "NetworkID": "f0f652a79efc54bcad52aafb4cbcc3b5dce1acaf11b172d8678d25f665faf63d",
+        "EndpointID": "2429c2b5d08db6c986bbd419a52ca4dd352715d80c5aeae04742efb84b0356fc",
+        "Gateway": "172.19.0.1",
+        "IPAddress": "172.19.0.2",
+        "IPPrefixLen": 16,
+        "IPv6Gateway": "",
+        "GlobalIPv6Address": "",
+        "GlobalIPv6PrefixLen": 0,
+        "MacAddress": "02:42:ac:13:00:02",
+        "DriverOpts": null
+      }
+    }
+  }
+}

pkg/container/mocks/data/image_net_consumer.json

@@ -0,0 +1,115 @@
+{
+  "Id": "sha256:904b8cb13b932e23230836850610fa45dce9eb0650d5618c2b1487c2a4f577b8",
+  "RepoTags": [
+    "nginx:latest"
+  ],
+  "RepoDigests": [
+    "nginx@sha256:aa0afebbb3cfa473099a62c4b32e9b3fb73ed23f2a75a65ce1d4b4f55a5c2ef2"
+  ],
+  "Parent": "",
+  "Comment": "",
+  "Created": "2023-03-01T18:43:12.914398123Z",
+  "Container": "71a4c9a59d252d7c54812429bfe5df477e54e91ebfff1939ae39ecdf055d445c",
+  "ContainerConfig": {
+    "Hostname": "71a4c9a59d25",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": false,
+    "AttachStderr": false,
+    "ExposedPorts": {
+      "80/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "NGINX_VERSION=1.23.3",
+      "NJS_VERSION=0.7.9",
+      "PKG_RELEASE=1~bullseye"
+    ],
+    "Cmd": [
+      "/bin/sh",
+      "-c",
+      "#(nop) ",
+      "CMD [\"nginx\" \"-g\" \"daemon off;\"]"
+    ],
+    "Image": "sha256:6716b8a33f73b21e193bb63424ea1105eaaa6a8237fefe75570bea18c87a1711",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/docker-entrypoint.sh"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
+    },
+    "StopSignal": "SIGQUIT"
+  },
+  "DockerVersion": "20.10.23",
+  "Author": "",
+  "Config": {
+    "Hostname": "",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": false,
+    "AttachStderr": false,
+    "ExposedPorts": {
+      "80/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "NGINX_VERSION=1.23.3",
+      "NJS_VERSION=0.7.9",
+      "PKG_RELEASE=1~bullseye"
+    ],
+    "Cmd": [
+      "nginx",
+      "-g",
+      "daemon off;"
+    ],
+    "Image": "sha256:6716b8a33f73b21e193bb63424ea1105eaaa6a8237fefe75570bea18c87a1711",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/docker-entrypoint.sh"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
+    },
+    "StopSignal": "SIGQUIT"
+  },
+  "Architecture": "amd64",
+  "Os": "linux",
+  "Size": 141838643,
+  "VirtualSize": 141838643,
+  "GraphDriver": {
+    "Data": {
+      "LowerDir": "/var/lib/docker/overlay2/09785ba17f27c783ef8b44f369f9aac0ca936000b57abf22b3c54d1e6eb8e27b/diff:/var/lib/docker/overlay2/6f8acd64ae44fd4d14bcb90c105eceba46854aa3985b5b6b317bcc5692cfc286/diff:/var/lib/docker/overlay2/73d41c15edb21c5f12cf53e313f48b5da55283aafc77d35b7bc662241879d7e7/diff:/var/lib/docker/overlay2/d97b55f3d966ae031492369a98e9e00d2bd31e520290fe2034e0a2b1ed77c91e/diff:/var/lib/docker/overlay2/053e9ca65c6b64cb9d98a812ff7488c7e77938b4fb8e0c4d2ad7f8ec235f0f20/diff",
+      "MergedDir": "/var/lib/docker/overlay2/105427179e5628eb7e893d53e21f42f9e76278f8b5665387ecdeed54a7231137/merged",
+      "UpperDir": "/var/lib/docker/overlay2/105427179e5628eb7e893d53e21f42f9e76278f8b5665387ecdeed54a7231137/diff",
+      "WorkDir": "/var/lib/docker/overlay2/105427179e5628eb7e893d53e21f42f9e76278f8b5665387ecdeed54a7231137/work"
+    },
+    "Name": "overlay2"
+  },
+  "RootFS": {
+    "Type": "layers",
+    "Layers": [
+      "sha256:650abce4b096b06ac8bec2046d821d66d801af34f1f1d4c5e272ad030c7873db",
+      "sha256:4dc5cd799a08ff49a603870c8378ea93083bfc2a4176f56e5531997e94c195d0",
+      "sha256:e161c82b34d21179db1f546c1cd84153d28a17d865ccaf2dedeb06a903fec12c",
+      "sha256:83ba6d8ffb8c2974174c02d3ba549e7e0656ebb1bc075a6b6ee89b6c609c6a71",
+      "sha256:d8466e142d8710abf5b495ebb536478f7e19d9d03b151b5d5bd09df4cfb49248",
+      "sha256:101af4ba983b04be266217ecee414e88b23e394f62e9801c7c1bdb37cb37bcaa"
+    ]
+  },
+  "Metadata": {
+    "LastTagTime": "0001-01-01T00:00:00Z"
+  }
+}

pkg/container/mocks/data/image_net_producer.json

@@ -0,0 +1,210 @@
+{
+  "Id": "sha256:c22b543d33bfdcb9992cbef23961677133cdf09da71d782468ae2517138bad51",
+  "RepoTags": [
+    "qmcgaw/gluetun:latest"
+  ],
+  "RepoDigests": [
+    "qmcgaw/gluetun@sha256:cd532bf4ef88a348a915c6dc62a9867a2eca89aa70559b0b4a1ea15cc0e595d1"
+  ],
+  "Parent": "",
+  "Comment": "buildkit.dockerfile.v0",
+  "Created": "2023-07-22T16:10:29.457146856Z",
+  "Container": "",
+  "ContainerConfig": {
+    "Hostname": "",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": false,
+    "AttachStderr": false,
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": null,
+    "Cmd": null,
+    "Image": "",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": null,
+    "OnBuild": null,
+    "Labels": null
+  },
+  "DockerVersion": "",
+  "Author": "",
+  "Config": {
+    "Hostname": "",
+    "Domainname": "",
+    "User": "",
+    "AttachStdin": false,
+    "AttachStdout": false,
+    "AttachStderr": false,
+    "ExposedPorts": {
+      "8000/tcp": {},
+      "8388/tcp": {},
+      "8388/udp": {},
+      "8888/tcp": {}
+    },
+    "Tty": false,
+    "OpenStdin": false,
+    "StdinOnce": false,
+    "Env": [
+      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+      "VPN_SERVICE_PROVIDER=pia",
+      "VPN_TYPE=openvpn",
+      "VPN_ENDPOINT_IP=",
+      "VPN_ENDPOINT_PORT=",
+      "VPN_INTERFACE=tun0",
+      "OPENVPN_PROTOCOL=udp",
+      "OPENVPN_USER=",
+      "OPENVPN_PASSWORD=",
+      "OPENVPN_USER_SECRETFILE=/run/secrets/openvpn_user",
+      "OPENVPN_PASSWORD_SECRETFILE=/run/secrets/openvpn_password",
+      "OPENVPN_VERSION=2.5",
+      "OPENVPN_VERBOSITY=1",
+      "OPENVPN_FLAGS=",
+      "OPENVPN_CIPHERS=",
+      "OPENVPN_AUTH=",
+      "OPENVPN_PROCESS_USER=root",
+      "OPENVPN_CUSTOM_CONFIG=",
+      "WIREGUARD_PRIVATE_KEY=",
+      "WIREGUARD_PRESHARED_KEY=",
+      "WIREGUARD_PUBLIC_KEY=",
+      "WIREGUARD_ALLOWED_IPS=",
+      "WIREGUARD_ADDRESSES=",
+      "WIREGUARD_MTU=1400",
+      "WIREGUARD_IMPLEMENTATION=auto",
+      "SERVER_REGIONS=",
+      "SERVER_COUNTRIES=",
+      "SERVER_CITIES=",
+      "SERVER_HOSTNAMES=",
+      "ISP=",
+      "OWNED_ONLY=no",
+      "PRIVATE_INTERNET_ACCESS_OPENVPN_ENCRYPTION_PRESET=",
+      "VPN_PORT_FORWARDING=off",
+      "VPN_PORT_FORWARDING_PROVIDER=",
+      "VPN_PORT_FORWARDING_STATUS_FILE=/tmp/gluetun/forwarded_port",
+      "OPENVPN_CERT=",
+      "OPENVPN_KEY=",
+      "OPENVPN_CLIENTCRT_SECRETFILE=/run/secrets/openvpn_clientcrt",
+      "OPENVPN_CLIENTKEY_SECRETFILE=/run/secrets/openvpn_clientkey",
+      "OPENVPN_ENCRYPTED_KEY=",
+      "OPENVPN_ENCRYPTED_KEY_SECRETFILE=/run/secrets/openvpn_encrypted_key",
+      "OPENVPN_KEY_PASSPHRASE=",
+      "OPENVPN_KEY_PASSPHRASE_SECRETFILE=/run/secrets/openvpn_key_passphrase",
+      "SERVER_NUMBER=",
+      "SERVER_NAMES=",
+      "FREE_ONLY=",
+      "MULTIHOP_ONLY=",
+      "PREMIUM_ONLY=",
+      "FIREWALL=on",
+      "FIREWALL_VPN_INPUT_PORTS=",
+      "FIREWALL_INPUT_PORTS=",
+      "FIREWALL_OUTBOUND_SUBNETS=",
+      "FIREWALL_DEBUG=off",
+      "LOG_LEVEL=info",
+      "HEALTH_SERVER_ADDRESS=127.0.0.1:9999",
+      "HEALTH_TARGET_ADDRESS=cloudflare.com:443",
+      "HEALTH_SUCCESS_WAIT_DURATION=5s",
+      "HEALTH_VPN_DURATION_INITIAL=6s",
+      "HEALTH_VPN_DURATION_ADDITION=5s",
+      "DOT=on",
+      "DOT_PROVIDERS=cloudflare",
+      "DOT_PRIVATE_ADDRESS=127.0.0.1/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,169.254.0.0/16,::1/128,fc00::/7,fe80::/10,::ffff:7f00:1/104,::ffff:a00:0/104,::ffff:a9fe:0/112,::ffff:ac10:0/108,::ffff:c0a8:0/112",
+      "DOT_VERBOSITY=1",
+      "DOT_VERBOSITY_DETAILS=0",
+      "DOT_VALIDATION_LOGLEVEL=0",
+      "DOT_CACHING=on",
+      "DOT_IPV6=off",
+      "BLOCK_MALICIOUS=on",
+      "BLOCK_SURVEILLANCE=off",
+      "BLOCK_ADS=off",
+      "UNBLOCK=",
+      "DNS_UPDATE_PERIOD=24h",
+      "DNS_ADDRESS=127.0.0.1",
+      "DNS_KEEP_NAMESERVER=off",
+      "HTTPPROXY=",
+      "HTTPPROXY_LOG=off",
+      "HTTPPROXY_LISTENING_ADDRESS=:8888",
+      "HTTPPROXY_STEALTH=off",
+      "HTTPPROXY_USER=",
+      "HTTPPROXY_PASSWORD=",
+      "HTTPPROXY_USER_SECRETFILE=/run/secrets/httpproxy_user",
+      "HTTPPROXY_PASSWORD_SECRETFILE=/run/secrets/httpproxy_password",
+      "SHADOWSOCKS=off",
+      "SHADOWSOCKS_LOG=off",
+      "SHADOWSOCKS_LISTENING_ADDRESS=:8388",
+      "SHADOWSOCKS_PASSWORD=",
+      "SHADOWSOCKS_PASSWORD_SECRETFILE=/run/secrets/shadowsocks_password",
+      "SHADOWSOCKS_CIPHER=chacha20-ietf-poly1305",
+      "HTTP_CONTROL_SERVER_LOG=on",
+      "HTTP_CONTROL_SERVER_ADDRESS=:8000",
+      "UPDATER_PERIOD=0",
+      "UPDATER_MIN_RATIO=0.8",
+      "UPDATER_VPN_SERVICE_PROVIDERS=",
+      "PUBLICIP_FILE=/tmp/gluetun/ip",
+      "PUBLICIP_PERIOD=12h",
+      "PPROF_ENABLED=no",
+      "PPROF_BLOCK_PROFILE_RATE=0",
+      "PPROF_MUTEX_PROFILE_RATE=0",
+      "PPROF_HTTP_SERVER_ADDRESS=:6060",
+      "VERSION_INFORMATION=on",
+      "TZ=",
+      "PUID=",
+      "PGID="
+    ],
+    "Cmd": null,
+    "Healthcheck": {
+      "Test": [
+        "CMD-SHELL",
+        "/gluetun-entrypoint healthcheck"
+      ],
+      "Interval": 5000000000,
+      "Timeout": 5000000000,
+      "StartPeriod": 10000000000,
+      "Retries": 1
+    },
+    "Image": "",
+    "Volumes": null,
+    "WorkingDir": "",
+    "Entrypoint": [
+      "/gluetun-entrypoint"
+    ],
+    "OnBuild": null,
+    "Labels": {
+      "org.opencontainers.image.authors": "quentin.mcgaw@gmail.com",
+      "org.opencontainers.image.created": "2023-07-22T16:07:05.641Z",
+      "org.opencontainers.image.description": "VPN client in a thin Docker container for multiple VPN providers, written in Go, and using OpenVPN or Wireguard, DNS over TLS, with a few proxy servers built-in.",
+      "org.opencontainers.image.documentation": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.licenses": "MIT",
+      "org.opencontainers.image.revision": "eecfb3952f202c0de3867d88e96d80c6b0f48359",
+      "org.opencontainers.image.source": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.title": "gluetun",
+      "org.opencontainers.image.url": "https://github.com/qdm12/gluetun",
+      "org.opencontainers.image.version": "latest"
+    }
+  },
+  "Architecture": "amd64",
+  "Os": "linux",
+  "Size": 42602255,
+  "VirtualSize": 42602255,
+  "GraphDriver": {
+    "Data": {
+      "LowerDir": "/var/lib/docker/overlay2/a20c9490a23ee8af51898892d9bf32258d44e0e07f3799475be8e8f273a50f73/diff:/var/lib/docker/overlay2/d4c97f367c37c6ada9de57f438a3e19cc714be2a54a6f582a03de9e42d88b344/diff",
+      "MergedDir": "/var/lib/docker/overlay2/0d222a3aa067159831c4111a408e40325be1085b935c98d39c2e9a01ff50b224/merged",
+      "UpperDir": "/var/lib/docker/overlay2/0d222a3aa067159831c4111a408e40325be1085b935c98d39c2e9a01ff50b224/diff",
+      "WorkDir": "/var/lib/docker/overlay2/0d222a3aa067159831c4111a408e40325be1085b935c98d39c2e9a01ff50b224/work"
+    },
+    "Name": "overlay2"
+  },
+  "RootFS": {
+    "Type": "layers",
+    "Layers": [
+      "sha256:78a822fe2a2d2c84f3de4a403188c45f623017d6a4521d23047c9fbb0801794c",
+      "sha256:122dbeefc08382d88b3fe57ad81c1e2428af5b81c172d112723a33e2a20fe880",
+      "sha256:3d215e55b88a99dcd7cf4349618326ab129771e12fdf6c6ef5cbb71a265dbb6c"
+    ]
+  },
+  "Metadata": {
+    "LastTagTime": "0001-01-01T00:00:00Z"
+  }
+}

pkg/filters/filters.go

@@ -13,7 +13,7 @@ func WatchtowerContainersFilter(c t.FilterableContainer) bool { return c.IsWatch
 // NoFilter will not filter out any containers
 func NoFilter(t.FilterableContainer) bool { return true }
 
-// FilterByNames returns all containers that match the specified name
+// FilterByNames returns all containers that match one of the specified names
 func FilterByNames(names []string, baseFilter t.Filter) t.Filter {
 	if len(names) == 0 {
 		return baseFilter
@@ -41,6 +41,22 @@ func FilterByNames(names []string, baseFilter t.Filter) t.Filter {
 	}
 }
 
+// FilterByDisableNames returns all containers that don't match any of the specified names
+func FilterByDisableNames(disableNames []string, baseFilter t.Filter) t.Filter {
+	if len(disableNames) == 0 {
+		return baseFilter
+	}
+
+	return func(c t.FilterableContainer) bool {
+		for _, name := range disableNames {
+			if name == c.Name() || name == c.Name()[1:] {
+				return false
+			}
+		}
+		return baseFilter(c)
+	}
+}
+
 // FilterByEnableLabel returns all containers that have the enabled label set
 func FilterByEnableLabel(baseFilter t.Filter) t.Filter {
 	return func(c t.FilterableContainer) bool {
@@ -70,13 +86,14 @@ func FilterByDisabledLabel(baseFilter t.Filter) t.Filter {
 
 // FilterByScope returns all containers that belongs to a specific scope
 func FilterByScope(scope string, baseFilter t.Filter) t.Filter {
-	if scope == "" {
-		return baseFilter
+	return func(c t.FilterableContainer) bool {
+		containerScope, containerHasScope := c.Scope()
+
+		if !containerHasScope || containerScope == "" {
+			containerScope = "none"
 		}
 
-	return func(c t.FilterableContainer) bool {
-		containerScope, ok := c.Scope()
-		if ok && containerScope == scope {
+		if containerScope == scope {
 			return baseFilter(c)
 		}
 
@@ -103,10 +120,11 @@ func FilterByImage(images []string, baseFilter t.Filter) t.Filter {
 }
 
 // BuildFilter creates the needed filter of containers
-func BuildFilter(names []string, enableLabel bool, scope string) (t.Filter, string) {
+func BuildFilter(names []string, disableNames []string, enableLabel bool, scope string) (t.Filter, string) {
 	sb := strings.Builder{}
 	filter := NoFilter
 	filter = FilterByNames(names, filter)
+	filter = FilterByDisableNames(disableNames, filter)
 
 	if len(names) > 0 {
 		sb.WriteString("which name matches \"")
@@ -118,6 +136,16 @@ func BuildFilter(names []string, enableLabel bool, scope string) (t.Filter, stri
 		}
 		sb.WriteString(`", `)
 	}
+	if len(disableNames) > 0 {
+		sb.WriteString("not named one of \"")
+		for i, n := range disableNames {
+			sb.WriteString(n)
+			if i < len(disableNames)-1 {
+				sb.WriteString(`" or "`)
+			}
+		}
+		sb.WriteString(`", `)
+	}
 
 	if enableLabel {
 		// If label filtering is enabled, containers should only be considered
@@ -125,7 +153,13 @@ func BuildFilter(names []string, enableLabel bool, scope string) (t.Filter, stri
 		filter = FilterByEnableLabel(filter)
 		sb.WriteString("using enable label, ")
 	}
-	if scope != "" {
+
+	if scope == "none" {
+		// If a scope has explicitly defined as "none", containers should only be considered
+		// if they do not have a scope defined, or if it's explicitly set to "none".
+		filter = FilterByScope(scope, filter)
+		sb.WriteString(`without a scope, "`)
+	} else if scope != "" {
 		// If a scope has been defined, containers should only be considered
 		// if the scope is specifically set.
 		filter = FilterByScope(scope, filter)

pkg/filters/filters_test.go

@@ -111,6 +111,53 @@ func TestFilterByScope(t *testing.T) {
 	container.AssertExpectations(t)
 }
 
+func TestFilterByNoneScope(t *testing.T) {
+	scope := "none"
+
+	filter := FilterByScope(scope, NoFilter)
+	assert.NotNil(t, filter)
+
+	container := new(mocks.FilterableContainer)
+	container.On("Scope").Return("anyscope", true)
+	assert.False(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Scope").Return("", false)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Scope").Return("", true)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Scope").Return("none", true)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+}
+
+func TestBuildFilterNoneScope(t *testing.T) {
+	filter, desc := BuildFilter(nil, nil, false, "none")
+
+	assert.Contains(t, desc, "without a scope")
+
+	scoped := new(mocks.FilterableContainer)
+	scoped.On("Enabled").Return(false, false)
+	scoped.On("Scope").Return("anyscope", true)
+
+	unscoped := new(mocks.FilterableContainer)
+	unscoped.On("Enabled").Return(false, false)
+	unscoped.On("Scope").Return("", false)
+
+	assert.False(t, filter(scoped))
+	assert.True(t, filter(unscoped))
+
+	scoped.AssertExpectations(t)
+	unscoped.AssertExpectations(t)
+}
+
 func TestFilterByDisabledLabel(t *testing.T) {
 	filter := FilterByDisabledLabel(NoFilter)
 	assert.NotNil(t, filter)
@@ -171,7 +218,7 @@ func TestFilterByImage(t *testing.T) {
 func TestBuildFilter(t *testing.T) {
 	names := []string{"test", "valid"}
 
-	filter, desc := BuildFilter(names, false, "")
+	filter, desc := BuildFilter(names, []string{}, false, "")
 	assert.Contains(t, desc, "test")
 	assert.Contains(t, desc, "or")
 	assert.Contains(t, desc, "valid")
@@ -210,7 +257,7 @@ func TestBuildFilterEnableLabel(t *testing.T) {
 	var names []string
 	names = append(names, "test")
 
-	filter, desc := BuildFilter(names, true, "")
+	filter, desc := BuildFilter(names, []string{}, true, "")
 	assert.Contains(t, desc, "using enable label")
 
 	container := new(mocks.FilterableContainer)
@@ -235,3 +282,52 @@ func TestBuildFilterEnableLabel(t *testing.T) {
 	assert.False(t, filter(container))
 	container.AssertExpectations(t)
 }
+
+func TestBuildFilterDisableContainer(t *testing.T) {
+	filter, desc := BuildFilter([]string{}, []string{"excluded", "notfound"}, false, "")
+	assert.Contains(t, desc, "not named")
+	assert.Contains(t, desc, "excluded")
+	assert.Contains(t, desc, "or")
+	assert.Contains(t, desc, "notfound")
+
+	container := new(mocks.FilterableContainer)
+	container.On("Name").Return("Another")
+	container.On("Enabled").Return(false, false)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Name").Return("AnotherOne")
+	container.On("Enabled").Return(true, true)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Name").Return("test")
+	container.On("Enabled").Return(false, false)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Name").Return("excluded")
+	container.On("Enabled").Return(true, true)
+	assert.False(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Name").Return("excludedAsSubstring")
+	container.On("Enabled").Return(true, true)
+	assert.True(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Name").Return("notfound")
+	container.On("Enabled").Return(true, true)
+	assert.False(t, filter(container))
+	container.AssertExpectations(t)
+
+	container = new(mocks.FilterableContainer)
+	container.On("Enabled").Return(false, true)
+	assert.False(t, filter(container))
+	container.AssertExpectations(t)
+}

pkg/lifecycle/lifecycle.go

@@ -29,7 +29,7 @@ func ExecutePostChecks(client container.Client, params types.UpdateParams) {
 }
 
 // ExecutePreCheckCommand tries to run the pre-check lifecycle hook for a single container.
-func ExecutePreCheckCommand(client container.Client, container container.Container) {
+func ExecutePreCheckCommand(client container.Client, container types.Container) {
 	clog := log.WithField("container", container.Name())
 	command := container.GetLifecyclePreCheckCommand()
 	if len(command) == 0 {
@@ -45,7 +45,7 @@ func ExecutePreCheckCommand(client container.Client, container container.Contain
 }
 
 // ExecutePostCheckCommand tries to run the post-check lifecycle hook for a single container.
-func ExecutePostCheckCommand(client container.Client, container container.Container) {
+func ExecutePostCheckCommand(client container.Client, container types.Container) {
 	clog := log.WithField("container", container.Name())
 	command := container.GetLifecyclePostCheckCommand()
 	if len(command) == 0 {
@@ -61,7 +61,7 @@ func ExecutePostCheckCommand(client container.Client, container container.Contai
 }
 
 // ExecutePreUpdateCommand tries to run the pre-update lifecycle hook for a single container.
-func ExecutePreUpdateCommand(client container.Client, container container.Container) (SkipUpdate bool, err error) {
+func ExecutePreUpdateCommand(client container.Client, container types.Container) (SkipUpdate bool, err error) {
 	timeout := container.PreUpdateTimeout()
 	command := container.GetLifecyclePreUpdateCommand()
 	clog := log.WithField("container", container.Name())

pkg/notifications/common_templates.go

@@ -35,5 +35,6 @@ var commonTemplates = map[string]string{
     no containers matched filter
   {{- end -}}
 {{- end -}}`,
-}
 
+	`json.v1`: `{{ . | ToJSON }}`,
+}

pkg/notifications/email.go

@@ -63,6 +63,7 @@ func (e *emailTypeNotifier) GetURL(c *cobra.Command) (string, error) {
 		UseHTML:     false,
 		Encryption:  shoutrrrSmtp.EncMethods.Auto,
 		Auth:        shoutrrrSmtp.AuthTypes.None,
+		ClientHost:  "localhost",
 	}
 
 	if len(e.User) > 0 {

pkg/notifications/json.go

@@ -0,0 +1,61 @@
+package notifications
+
+import (
+	"encoding/json"
+
+	t "github.com/containrrr/watchtower/pkg/types"
+)
+
+type jsonMap = map[string]interface{}
+
+// MarshalJSON implements json.Marshaler
+func (d Data) MarshalJSON() ([]byte, error) {
+	var entries = make([]jsonMap, len(d.Entries))
+	for i, entry := range d.Entries {
+		entries[i] = jsonMap{
+			`level`:   entry.Level,
+			`message`: entry.Message,
+			`data`:    entry.Data,
+			`time`:    entry.Time,
+		}
+	}
+
+	var report jsonMap
+	if d.Report != nil {
+		report = jsonMap{
+			`scanned`: marshalReports(d.Report.Scanned()),
+			`updated`: marshalReports(d.Report.Updated()),
+			`failed`:  marshalReports(d.Report.Failed()),
+			`skipped`: marshalReports(d.Report.Skipped()),
+			`stale`:   marshalReports(d.Report.Stale()),
+			`fresh`:   marshalReports(d.Report.Fresh()),
+		}
+	}
+
+	return json.Marshal(jsonMap{
+		`report`:  report,
+		`title`:   d.Title,
+		`host`:    d.Host,
+		`entries`: entries,
+	})
+}
+
+func marshalReports(reports []t.ContainerReport) []jsonMap {
+	jsonReports := make([]jsonMap, len(reports))
+	for i, report := range reports {
+		jsonReports[i] = jsonMap{
+			`id`:             report.ID().ShortID(),
+			`name`:           report.Name(),
+			`currentImageId`: report.CurrentImageID().ShortID(),
+			`latestImageId`:  report.LatestImageID().ShortID(),
+			`imageName`:      report.ImageName(),
+			`state`:          report.State(),
+		}
+		if errorMessage := report.Error(); errorMessage != "" {
+			jsonReports[i][`error`] = errorMessage
+		}
+	}
+	return jsonReports
+}
+
+var _ json.Marshaler = &Data{}

pkg/notifications/json_test.go

@@ -0,0 +1,118 @@
+package notifications
+
+import (
+	s "github.com/containrrr/watchtower/pkg/session"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("JSON template", func() {
+	When("using report templates", func() {
+		When("JSON template is used", func() {
+			It("should format the messages to the expected format", func() {
+				expected := `{
+	"entries": [
+			{
+				"data": null,
+				"level": "info",
+				"message": "foo Bar",
+				"time": "0001-01-01T00:00:00Z"
+			}
+		],
+		"host": "Mock",
+		"report": {
+		"failed": [
+			{
+				"currentImageId": "01d210000000",
+				"error": "accidentally the whole container",
+				"id": "c79210000000",
+				"imageName": "mock/fail1:latest",
+				"latestImageId": "d0a210000000",
+				"name": "fail1",
+				"state": "Failed"
+			}
+		],
+		"fresh": [
+			{
+				"currentImageId": "01d310000000",
+				"id": "c79310000000",
+				"imageName": "mock/frsh1:latest",
+				"latestImageId": "01d310000000",
+				"name": "frsh1",
+				"state": "Fresh"
+			}
+		],
+		"scanned": [
+			{
+				"currentImageId": "01d110000000",
+				"id": "c79110000000",
+				"imageName": "mock/updt1:latest",
+				"latestImageId": "d0a110000000",
+				"name": "updt1",
+				"state": "Updated"
+			},
+			{
+				"currentImageId": "01d120000000",
+				"id": "c79120000000",
+				"imageName": "mock/updt2:latest",
+				"latestImageId": "d0a120000000",
+				"name": "updt2",
+				"state": "Updated"
+			},
+			{
+				"currentImageId": "01d210000000",
+				"error": "accidentally the whole container",
+				"id": "c79210000000",
+				"imageName": "mock/fail1:latest",
+				"latestImageId": "d0a210000000",
+				"name": "fail1",
+				"state": "Failed"
+			},
+			{
+				"currentImageId": "01d310000000",
+				"id": "c79310000000",
+				"imageName": "mock/frsh1:latest",
+				"latestImageId": "01d310000000",
+				"name": "frsh1",
+				"state": "Fresh"
+			}
+		],
+		"skipped": [
+			{
+				"currentImageId": "01d410000000",
+				"error": "unpossible",
+				"id": "c79410000000",
+				"imageName": "mock/skip1:latest",
+				"latestImageId": "01d410000000",
+				"name": "skip1",
+				"state": "Skipped"
+			}
+		],
+		"stale": [],
+		"updated": [
+			{
+				"currentImageId": "01d110000000",
+				"id": "c79110000000",
+				"imageName": "mock/updt1:latest",
+				"latestImageId": "d0a110000000",
+				"name": "updt1",
+				"state": "Updated"
+			},
+			{
+				"currentImageId": "01d120000000",
+				"id": "c79120000000",
+				"imageName": "mock/updt2:latest",
+				"latestImageId": "d0a120000000",
+				"name": "updt2",
+				"state": "Updated"
+			}
+		]
+		},
+		"title": "Watchtower updates on Mock"
+}`
+				data := mockDataFromStates(s.UpdatedState, s.FreshState, s.FailedState, s.SkippedState, s.UpdatedState)
+				Expect(getTemplatedResult(`json.v1`, false, data)).To(MatchJSON(expected))
+			})
+		})
+	})
+})

pkg/notifications/model.go

@@ -0,0 +1,19 @@
+package notifications
+
+import (
+	t "github.com/containrrr/watchtower/pkg/types"
+	log "github.com/sirupsen/logrus"
+)
+
+// StaticData is the part of the notification template data model set upon initialization
+type StaticData struct {
+	Title string
+	Host  string
+}
+
+// Data is the notification template data model
+type Data struct {
+	StaticData
+	Entries []*log.Entry
+	Report  t.Report
+}

pkg/notifications/preview/data/data.go

@@ -0,0 +1,143 @@
+package data
+
+import (
+	"encoding/hex"
+	"errors"
+	"math/rand"
+	"strconv"
+	"time"
+
+	"github.com/containrrr/watchtower/pkg/types"
+)
+
+type previewData struct {
+	rand           *rand.Rand
+	lastTime       time.Time
+	report         *report
+	containerCount int
+	Entries        []*logEntry
+	StaticData     staticData
+}
+
+type staticData struct {
+	Title string
+	Host  string
+}
+
+// New initializes a new preview data struct
+func New() *previewData {
+	return &previewData{
+		rand:           rand.New(rand.NewSource(1)),
+		lastTime:       time.Now().Add(-30 * time.Minute),
+		report:         nil,
+		containerCount: 0,
+		Entries:        []*logEntry{},
+		StaticData: staticData{
+			Title: "Title",
+			Host:  "Host",
+		},
+	}
+}
+
+// AddFromState adds a container status entry to the report with the given state
+func (pb *previewData) AddFromState(state State) {
+	cid := types.ContainerID(pb.generateID())
+	old := types.ImageID(pb.generateID())
+	new := types.ImageID(pb.generateID())
+	name := pb.generateName()
+	image := pb.generateImageName(name)
+	var err error
+	if state == FailedState {
+		err = errors.New(pb.randomEntry(errorMessages))
+	} else if state == SkippedState {
+		err = errors.New(pb.randomEntry(skippedMessages))
+	}
+	pb.addContainer(containerStatus{
+		containerID:   cid,
+		oldImage:      old,
+		newImage:      new,
+		containerName: name,
+		imageName:     image,
+		error:         err,
+		state:         state,
+	})
+}
+
+func (pb *previewData) addContainer(c containerStatus) {
+	if pb.report == nil {
+		pb.report = &report{}
+	}
+	switch c.state {
+	case ScannedState:
+		pb.report.scanned = append(pb.report.scanned, &c)
+	case UpdatedState:
+		pb.report.updated = append(pb.report.updated, &c)
+	case FailedState:
+		pb.report.failed = append(pb.report.failed, &c)
+	case SkippedState:
+		pb.report.skipped = append(pb.report.skipped, &c)
+	case StaleState:
+		pb.report.stale = append(pb.report.stale, &c)
+	case FreshState:
+		pb.report.fresh = append(pb.report.fresh, &c)
+	default:
+		return
+	}
+	pb.containerCount += 1
+}
+
+// AddLogEntry adds a preview log entry of the given level
+func (pd *previewData) AddLogEntry(level LogLevel) {
+	var msg string
+	switch level {
+	case FatalLevel:
+		fallthrough
+	case ErrorLevel:
+		fallthrough
+	case WarnLevel:
+		msg = pd.randomEntry(logErrors)
+	default:
+		msg = pd.randomEntry(logMessages)
+	}
+	pd.Entries = append(pd.Entries, &logEntry{
+		Message: msg,
+		Data:    map[string]any{},
+		Time:    pd.generateTime(),
+		Level:   level,
+	})
+}
+
+// Report returns a preview report
+func (pb *previewData) Report() types.Report {
+	return pb.report
+}
+
+func (pb *previewData) generateID() string {
+	buf := make([]byte, 32)
+	_, _ = pb.rand.Read(buf)
+	return hex.EncodeToString(buf)
+}
+
+func (pb *previewData) generateTime() time.Time {
+	pb.lastTime = pb.lastTime.Add(time.Duration(pb.rand.Intn(30)) * time.Second)
+	return pb.lastTime
+}
+
+func (pb *previewData) randomEntry(arr []string) string {
+	return arr[pb.rand.Intn(len(arr))]
+}
+
+func (pb *previewData) generateName() string {
+	index := pb.containerCount
+	if index <= len(containerNames) {
+		return "/" + containerNames[index]
+	}
+	suffix := index / len(containerNames)
+	index %= len(containerNames)
+	return "/" + containerNames[index] + strconv.FormatInt(int64(suffix), 10)
+}
+
+func (pb *previewData) generateImageName(name string) string {
+	index := pb.containerCount % len(organizationNames)
+	return organizationNames[index] + name + ":latest"
+}

pkg/notifications/preview/data/logs.go

@@ -0,0 +1,56 @@
+package data
+
+import (
+	"time"
+)
+
+type logEntry struct {
+	Message string
+	Data    map[string]any
+	Time    time.Time
+	Level   LogLevel
+}
+
+// LogLevel is the analog of logrus.Level
+type LogLevel string
+
+const (
+	TraceLevel LogLevel = "trace"
+	DebugLevel LogLevel = "debug"
+	InfoLevel  LogLevel = "info"
+	WarnLevel  LogLevel = "warning"
+	ErrorLevel LogLevel = "error"
+	FatalLevel LogLevel = "fatal"
+	PanicLevel LogLevel = "panic"
+)
+
+// LevelsFromString parses a string of level characters and returns a slice of the corresponding log levels
+func LevelsFromString(str string) []LogLevel {
+	levels := make([]LogLevel, 0, len(str))
+	for _, c := range str {
+		switch c {
+		case 'p':
+			levels = append(levels, PanicLevel)
+		case 'f':
+			levels = append(levels, FatalLevel)
+		case 'e':
+			levels = append(levels, ErrorLevel)
+		case 'w':
+			levels = append(levels, WarnLevel)
+		case 'i':
+			levels = append(levels, InfoLevel)
+		case 'd':
+			levels = append(levels, DebugLevel)
+		case 't':
+			levels = append(levels, TraceLevel)
+		default:
+			continue
+		}
+	}
+	return levels
+}
+
+// String returns the log level as a string
+func (level LogLevel) String() string {
+	return string(level)
+}

pkg/notifications/preview/data/preview_strings.go

@@ -0,0 +1,178 @@
+package data
+
+var containerNames = []string{
+	"cyberscribe",
+	"datamatrix",
+	"nexasync",
+	"quantumquill",
+	"aerosphere",
+	"virtuos",
+	"fusionflow",
+	"neuralink",
+	"pixelpulse",
+	"synthwave",
+	"codecraft",
+	"zapzone",
+	"robologic",
+	"dreamstream",
+	"infinisync",
+	"megamesh",
+	"novalink",
+	"xenogenius",
+	"ecosim",
+	"innovault",
+	"techtracer",
+	"fusionforge",
+	"quantumquest",
+	"neuronest",
+	"codefusion",
+	"datadyno",
+	"pixelpioneer",
+	"vortexvision",
+	"cybercraft",
+	"synthsphere",
+	"infinitescript",
+	"roborhythm",
+	"dreamengine",
+	"aquasync",
+	"geniusgrid",
+	"megamind",
+	"novasync-pro",
+	"xenonwave",
+	"ecologic",
+	"innoscan",
+}
+
+var organizationNames = []string{
+	"techwave",
+	"codecrafters",
+	"innotechlabs",
+	"fusionsoft",
+	"cyberpulse",
+	"quantumscribe",
+	"datadynamo",
+	"neuralink",
+	"pixelpro",
+	"synthwizards",
+	"virtucorplabs",
+	"robologic",
+	"dreamstream",
+	"novanest",
+	"megamind",
+	"xenonwave",
+	"ecologic",
+	"innosync",
+	"techgenius",
+	"nexasoft",
+	"codewave",
+	"zapzone",
+	"techsphere",
+	"aquatech",
+	"quantumcraft",
+	"neuronest",
+	"datafusion",
+	"pixelpioneer",
+	"synthsphere",
+	"infinitescribe",
+	"roborhythm",
+	"dreamengine",
+	"vortexvision",
+	"geniusgrid",
+	"megamesh",
+	"novasync",
+	"xenogeniuslabs",
+	"ecosim",
+	"innovault",
+}
+
+var errorMessages = []string{
+	"Error 404: Resource not found",
+	"Critical Error: System meltdown imminent",
+	"Error 500: Internal server error",
+	"Invalid input: Please check your data",
+	"Access denied: Unauthorized access detected",
+	"Network connection lost: Please check your connection",
+	"Error 403: Forbidden access",
+	"Fatal error: System crash imminent",
+	"File not found: Check the file path",
+	"Invalid credentials: Authentication failed",
+	"Error 502: Bad Gateway",
+	"Database connection failed: Please try again later",
+	"Security breach detected: Take immediate action",
+	"Error 400: Bad request",
+	"Out of memory: Close unnecessary applications",
+	"Invalid configuration: Check your settings",
+	"Error 503: Service unavailable",
+	"File is read-only: Cannot modify",
+	"Data corruption detected: Backup your data",
+	"Error 401: Unauthorized",
+	"Disk space full: Free up disk space",
+	"Connection timeout: Retry your request",
+	"Error 504: Gateway timeout",
+	"File access denied: Permission denied",
+	"Unexpected error: Please contact support",
+	"Error 429: Too many requests",
+	"Invalid URL: Check the URL format",
+	"Database query failed: Try again later",
+	"Error 408: Request timeout",
+	"File is in use: Close the file and try again",
+	"Invalid parameter: Check your input",
+	"Error 502: Proxy error",
+	"Database connection lost: Reconnect and try again",
+	"File size exceeds limit: Reduce the file size",
+	"Error 503: Overloaded server",
+	"Operation aborted: Try again",
+	"Invalid API key: Check your API key",
+	"Error 507: Insufficient storage",
+	"Database deadlock: Retry your transaction",
+	"Error 405: Method not allowed",
+	"File format not supported: Choose a different format",
+	"Unknown error: Contact system administrator",
+}
+
+var skippedMessages = []string{
+	"Fear of introducing new bugs",
+	"Don't have time for the update process",
+	"Current version works fine for my needs",
+	"Concerns about compatibility with other software",
+	"Limited bandwidth for downloading updates",
+	"Worries about losing custom settings or configurations",
+	"Lack of trust in the software developer's updates",
+	"Dislike changes to the user interface",
+	"Avoiding potential subscription fees",
+	"Suspicion of hidden data collection in updates",
+	"Apprehension about changes in privacy policies",
+	"Prefer the older version's features or design",
+	"Worry about software becoming more resource-intensive",
+	"Avoiding potential changes in licensing terms",
+	"Waiting for initial bugs to be resolved in the update",
+	"Concerns about update breaking third-party plugins or extensions",
+	"Belief that the software is already secure enough",
+	"Don't want to relearn how to use the software",
+	"Fear of losing access to older file formats",
+	"Avoiding the hassle of having to update multiple devices",
+}
+
+var logMessages = []string{
+	"Checking for available updates...",
+	"Downloading update package...",
+	"Verifying update integrity...",
+	"Preparing to install update...",
+	"Backing up existing configuration...",
+	"Installing update...",
+	"Update installation complete.",
+	"Applying configuration settings...",
+	"Cleaning up temporary files...",
+	"Update successful! Software is now up-to-date.",
+	"Restarting the application...",
+	"Restart complete. Enjoy the latest features!",
+	"Update rollback complete. Your software remains at the previous version.",
+}
+
+var logErrors = []string{
+	"Unable to check for updates. Please check your internet connection.",
+	"Update package download failed. Try again later.",
+	"Update verification failed. Please contact support.",
+	"Update installation failed. Rolling back to the previous version...",
+	"Your configuration settings may have been reset to defaults.",
+}

pkg/notifications/preview/data/report.go

@@ -0,0 +1,110 @@
+package data
+
+import (
+	"sort"
+
+	"github.com/containrrr/watchtower/pkg/types"
+)
+
+// State is the outcome of a container in a session report
+type State string
+
+const (
+	ScannedState State = "scanned"
+	UpdatedState State = "updated"
+	FailedState  State = "failed"
+	SkippedState State = "skipped"
+	StaleState   State = "stale"
+	FreshState   State = "fresh"
+)
+
+// StatesFromString parses a string of state characters and returns a slice of the corresponding report states
+func StatesFromString(str string) []State {
+	states := make([]State, 0, len(str))
+	for _, c := range str {
+		switch c {
+		case 'c':
+			states = append(states, ScannedState)
+		case 'u':
+			states = append(states, UpdatedState)
+		case 'e':
+			states = append(states, FailedState)
+		case 'k':
+			states = append(states, SkippedState)
+		case 't':
+			states = append(states, StaleState)
+		case 'f':
+			states = append(states, FreshState)
+		default:
+			continue
+		}
+	}
+	return states
+}
+
+type report struct {
+	scanned []types.ContainerReport
+	updated []types.ContainerReport
+	failed  []types.ContainerReport
+	skipped []types.ContainerReport
+	stale   []types.ContainerReport
+	fresh   []types.ContainerReport
+}
+
+func (r *report) Scanned() []types.ContainerReport {
+	return r.scanned
+}
+func (r *report) Updated() []types.ContainerReport {
+	return r.updated
+}
+func (r *report) Failed() []types.ContainerReport {
+	return r.failed
+}
+func (r *report) Skipped() []types.ContainerReport {
+	return r.skipped
+}
+func (r *report) Stale() []types.ContainerReport {
+	return r.stale
+}
+func (r *report) Fresh() []types.ContainerReport {
+	return r.fresh
+}
+
+func (r *report) All() []types.ContainerReport {
+	allLen := len(r.scanned) + len(r.updated) + len(r.failed) + len(r.skipped) + len(r.stale) + len(r.fresh)
+	all := make([]types.ContainerReport, 0, allLen)
+
+	presentIds := map[types.ContainerID][]string{}
+
+	appendUnique := func(reports []types.ContainerReport) {
+		for _, cr := range reports {
+			if _, found := presentIds[cr.ID()]; found {
+				continue
+			}
+			all = append(all, cr)
+			presentIds[cr.ID()] = nil
+		}
+	}
+
+	appendUnique(r.updated)
+	appendUnique(r.failed)
+	appendUnique(r.skipped)
+	appendUnique(r.stale)
+	appendUnique(r.fresh)
+	appendUnique(r.scanned)
+
+	sort.Sort(sortableContainers(all))
+
+	return all
+}
+
+type sortableContainers []types.ContainerReport
+
+// Len implements sort.Interface.Len
+func (s sortableContainers) Len() int { return len(s) }
+
+// Less implements sort.Interface.Less
+func (s sortableContainers) Less(i, j int) bool { return s[i].ID() < s[j].ID() }
+
+// Swap implements sort.Interface.Swap
+func (s sortableContainers) Swap(i, j int) { s[i], s[j] = s[j], s[i] }

pkg/notifications/preview/data/status.go

@@ -0,0 +1,44 @@
+package data
+
+import wt "github.com/containrrr/watchtower/pkg/types"
+
+type containerStatus struct {
+	containerID   wt.ContainerID
+	oldImage      wt.ImageID
+	newImage      wt.ImageID
+	containerName string
+	imageName     string
+	error
+	state State
+}
+
+func (u *containerStatus) ID() wt.ContainerID {
+	return u.containerID
+}
+
+func (u *containerStatus) Name() string {
+	return u.containerName
+}
+
+func (u *containerStatus) CurrentImageID() wt.ImageID {
+	return u.oldImage
+}
+
+func (u *containerStatus) LatestImageID() wt.ImageID {
+	return u.newImage
+}
+
+func (u *containerStatus) ImageName() string {
+	return u.imageName
+}
+
+func (u *containerStatus) Error() string {
+	if u.error == nil {
+		return ""
+	}
+	return u.error.Error()
+}
+
+func (u *containerStatus) State() string {
+	return string(u.state)
+}

pkg/notifications/preview/tplprev.go

@@ -0,0 +1,36 @@
+package preview
+
+import (
+	"fmt"
+	"strings"
+	"text/template"
+
+	"github.com/containrrr/watchtower/pkg/notifications/preview/data"
+	"github.com/containrrr/watchtower/pkg/notifications/templates"
+)
+
+func Render(input string, states []data.State, loglevels []data.LogLevel) (string, error) {
+
+	data := data.New()
+
+	tpl, err := template.New("").Funcs(templates.Funcs).Parse(input)
+	if err != nil {
+		return "", fmt.Errorf("failed to parse %v", err)
+	}
+
+	for _, state := range states {
+		data.AddFromState(state)
+	}
+
+	for _, level := range loglevels {
+		data.AddLogEntry(level)
+	}
+
+	var buf strings.Builder
+	err = tpl.Execute(&buf, data)
+	if err != nil {
+		return "", fmt.Errorf("failed to execute template: %v", err)
+	}
+
+	return buf.String(), nil
+}

pkg/notifications/shoutrrr.go

@@ -10,10 +10,9 @@ import (
 
 	"github.com/containrrr/shoutrrr"
 	"github.com/containrrr/shoutrrr/pkg/types"
+	"github.com/containrrr/watchtower/pkg/notifications/templates"
 	t "github.com/containrrr/watchtower/pkg/types"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/text/cases"
-	"golang.org/x/text/language"
 )
 
 // LocalLog is a logrus logger that does not send entries as notifications
@@ -61,7 +60,7 @@ func (n *shoutrrrTypeNotifier) GetNames() []string {
 	return names
 }
 
-// GetNames returns a list of URLs for notification services that has been added
+// GetURLs returns a list of URLs for notification services that has been added
 func (n *shoutrrrTypeNotifier) GetURLs() []string {
 	return n.Urls
 }
@@ -74,7 +73,7 @@ func (n *shoutrrrTypeNotifier) AddLogHook() {
 	n.receiving = true
 	log.AddHook(n)
 
-	// Do the sending in a separate goroutine so we don't block the main process.
+	// Do the sending in a separate goroutine, so we don't block the main process.
 	go sendNotifications(n)
 }
 
@@ -110,6 +109,7 @@ func createNotifier(urls []string, level log.Level, tplString string, legacy boo
 		legacyTemplate: legacy,
 		data:           data,
 		params:         params,
+		delay:          delay,
 	}
 }
 
@@ -207,12 +207,8 @@ func (n *shoutrrrTypeNotifier) Fire(entry *log.Entry) error {
 }
 
 func getShoutrrrTemplate(tplString string, legacy bool) (tpl *template.Template, err error) {
-	funcs := template.FuncMap{
-		"ToUpper": strings.ToUpper,
-		"ToLower": strings.ToLower,
-		"Title":   cases.Title(language.AmericanEnglish).String,
-	}
-	tplBase := template.New("").Funcs(funcs)
+
+	tplBase := template.New("").Funcs(templates.Funcs)
 
 	if builtin, found := commonTemplates[tplString]; found {
 		log.WithField(`template`, tplString).Debug(`Using common template`)
@@ -240,16 +236,3 @@ func getShoutrrrTemplate(tplString string, legacy bool) (tpl *template.Template,
 
 	return
 }
-
-// StaticData is the part of the notification template data model set upon initialization
-type StaticData struct {
-	Title string
-	Host  string
-}
-
-// Data is the notification template data model
-type Data struct {
-	StaticData
-	Entries []*log.Entry
-	Report  t.Report
-}

pkg/notifications/templates/funcs.go

@@ -0,0 +1,27 @@
+package templates
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+	"text/template"
+
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+)
+
+var Funcs = template.FuncMap{
+	"ToUpper": strings.ToUpper,
+	"ToLower": strings.ToLower,
+	"ToJSON":  toJSON,
+	"Title":   cases.Title(language.AmericanEnglish).String,
+}
+
+func toJSON(v interface{}) string {
+	var bytes []byte
+	var err error
+	if bytes, err = json.MarshalIndent(v, "", "  "); err != nil {
+		return fmt.Sprintf("failed to marshal JSON in notification template: %v", err)
+	}
+	return string(bytes)
+}

pkg/registry/auth/auth.go

@@ -4,14 +4,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strings"
 
 	"github.com/containrrr/watchtower/pkg/registry/helpers"
 	"github.com/containrrr/watchtower/pkg/types"
-	"github.com/docker/distribution/reference"
+	ref "github.com/distribution/reference"
 	"github.com/sirupsen/logrus"
 )
 
@@ -20,13 +20,13 @@ const ChallengeHeader = "WWW-Authenticate"
 
 // GetToken fetches a token for the registry hosting the provided image
 func GetToken(container types.Container, registryAuth string) (string, error) {
-	var err error
-	var URL url.URL
-
-	if URL, err = GetChallengeURL(container.ImageName()); err != nil {
+	normalizedRef, err := ref.ParseNormalizedNamed(container.ImageName())
+	if err != nil {
 		return "", err
 	}
-	logrus.WithField("URL", URL.String()).Debug("Building challenge URL")
+
+	URL := GetChallengeURL(normalizedRef)
+	logrus.WithField("URL", URL.String()).Debug("Built challenge URL")
 
 	var req *http.Request
 	if req, err = GetChallengeRequest(URL); err != nil {
@@ -55,7 +55,7 @@ func GetToken(container types.Container, registryAuth string) (string, error) {
 		return fmt.Sprintf("Basic %s", registryAuth), nil
 	}
 	if strings.HasPrefix(challenge, "bearer") {
-		return GetBearerHeader(challenge, container.ImageName(), registryAuth)
+		return GetBearerHeader(challenge, normalizedRef, registryAuth)
 	}
 
 	return "", errors.New("unsupported challenge type from registry")
@@ -73,12 +73,9 @@ func GetChallengeRequest(URL url.URL) (*http.Request, error) {
 }
 
 // GetBearerHeader tries to fetch a bearer token from the registry based on the challenge instructions
-func GetBearerHeader(challenge string, img string, registryAuth string) (string, error) {
+func GetBearerHeader(challenge string, imageRef ref.Named, registryAuth string) (string, error) {
 	client := http.Client{}
-	if strings.Contains(img, ":") {
-		img = strings.Split(img, ":")[0]
-	}
-	authURL, err := GetAuthURL(challenge, img)
+	authURL, err := GetAuthURL(challenge, imageRef)
 
 	if err != nil {
 		return "", err
@@ -91,7 +88,8 @@ func GetBearerHeader(challenge string, img string, registryAuth string) (string,
 
 	if registryAuth != "" {
 		logrus.Debug("Credentials found.")
-		logrus.Tracef("Credentials: %v", registryAuth)
+		// CREDENTIAL: Uncomment to log registry credentials
+		// logrus.Tracef("Credentials: %v", registryAuth)
 		r.Header.Add("Authorization", fmt.Sprintf("Basic %s", registryAuth))
 	} else {
 		logrus.Debug("No credentials found.")
@@ -102,7 +100,7 @@ func GetBearerHeader(challenge string, img string, registryAuth string) (string,
 		return "", err
 	}
 
-	body, _ := ioutil.ReadAll(authResponse.Body)
+	body, _ := io.ReadAll(authResponse.Body)
 	tokenResponse := &types.TokenResponse{}
 
 	err = json.Unmarshal(body, tokenResponse)
@@ -114,7 +112,7 @@ func GetBearerHeader(challenge string, img string, registryAuth string) (string,
 }
 
 // GetAuthURL from the instructions in the challenge
-func GetAuthURL(challenge string, img string) (*url.URL, error) {
+func GetAuthURL(challenge string, imageRef ref.Named) (*url.URL, error) {
 	loweredChallenge := strings.ToLower(challenge)
 	raw := strings.TrimPrefix(loweredChallenge, "bearer")
 
@@ -123,10 +121,9 @@ func GetAuthURL(challenge string, img string) (*url.URL, error) {
 
 	for _, pair := range pairs {
 		trimmed := strings.Trim(pair, " ")
-		kv := strings.Split(trimmed, "=")
-		key := kv[0]
-		val := strings.Trim(kv[1], "\"")
-		values[key] = val
+		if key, val, ok := strings.Cut(trimmed, "="); ok {
+			values[key] = strings.Trim(val, `"`)
+		}
 	}
 	logrus.WithFields(logrus.Fields{
 		"realm":   values["realm"],
@@ -141,53 +138,25 @@ func GetAuthURL(challenge string, img string) (*url.URL, error) {
 	q := authURL.Query()
 	q.Add("service", values["service"])
 
-	scopeImage := GetScopeFromImageName(img, values["service"])
+	scopeImage := ref.Path(imageRef)
 
 	scope := fmt.Sprintf("repository:%s:pull", scopeImage)
-	logrus.WithFields(logrus.Fields{"scope": scope, "image": img}).Debug("Setting scope for auth token")
+	logrus.WithFields(logrus.Fields{"scope": scope, "image": imageRef.Name()}).Debug("Setting scope for auth token")
 	q.Add("scope", scope)
 
 	authURL.RawQuery = q.Encode()
 	return authURL, nil
 }
 
-// GetScopeFromImageName normalizes an image name for use as scope during auth and head requests
-func GetScopeFromImageName(img, svc string) string {
-	parts := strings.Split(img, "/")
-
-	if len(parts) > 2 {
-		if strings.Contains(svc, "docker.io") {
-			return fmt.Sprintf("%s/%s", parts[1], strings.Join(parts[2:], "/"))
-		}
-		return strings.Join(parts, "/")
-	}
-
-	if len(parts) == 2 {
-		if strings.Contains(parts[0], "docker.io") {
-			return fmt.Sprintf("library/%s", parts[1])
-		}
-		return strings.Replace(img, svc+"/", "", 1)
-	}
-
-	if strings.Contains(svc, "docker.io") {
-		return fmt.Sprintf("library/%s", parts[0])
-	}
-	return img
-}
-
-// GetChallengeURL creates a URL object based on the image info
-func GetChallengeURL(img string) (url.URL, error) {
-
-	normalizedNamed, _ := reference.ParseNormalizedNamed(img)
-	host, err := helpers.NormalizeRegistry(normalizedNamed.String())
-	if err != nil {
-		return url.URL{}, err
-	}
+// GetChallengeURL returns the URL to check auth requirements
+// for access to a given image
+func GetChallengeURL(imageRef ref.Named) url.URL {
+	host, _ := helpers.GetRegistryAddress(imageRef.Name())
 
 	URL := url.URL{
 		Scheme: "https",
 		Host:   host,
 		Path:   "/v2/",
 	}
-	return URL, nil
+	return URL
 }

pkg/registry/auth/auth_test.go

@@ -2,14 +2,17 @@ package auth_test
 
 import (
 	"fmt"
-	"github.com/containrrr/watchtower/internal/actions/mocks"
-	"github.com/containrrr/watchtower/pkg/registry/auth"
 	"net/url"
 	"os"
+	"strings"
 	"testing"
 	"time"
 
+	"github.com/containrrr/watchtower/internal/actions/mocks"
+	"github.com/containrrr/watchtower/pkg/registry/auth"
+
 	wtTypes "github.com/containrrr/watchtower/pkg/types"
+	ref "github.com/distribution/reference"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 )
@@ -51,7 +54,7 @@ var _ = Describe("the auth module", func() {
 		mockCreated,
 		mockDigest)
 
-	When("getting an auth url", func() {
+	Describe("GetToken", func() {
 		It("should parse the token from the response",
 			SkipIfCredentialsEmpty(GHCRCredentials, func() {
 				creds := fmt.Sprintf("%s:%s", GHCRCredentials.Username, GHCRCredentials.Password)
@@ -60,61 +63,100 @@ var _ = Describe("the auth module", func() {
 				Expect(token).NotTo(Equal(""))
 			}),
 		)
+	})
 
+	Describe("GetAuthURL", func() {
 		It("should create a valid auth url object based on the challenge header supplied", func() {
-			input := `bearer realm="https://ghcr.io/token",service="ghcr.io",scope="repository:user/image:pull"`
+			challenge := `bearer realm="https://ghcr.io/token",service="ghcr.io",scope="repository:user/image:pull"`
+			imageRef, err := ref.ParseNormalizedNamed("containrrr/watchtower")
+			Expect(err).NotTo(HaveOccurred())
 			expected := &url.URL{
 				Host:     "ghcr.io",
 				Scheme:   "https",
 				Path:     "/token",
 				RawQuery: "scope=repository%3Acontainrrr%2Fwatchtower%3Apull&service=ghcr.io",
 			}
-			res, err := auth.GetAuthURL(input, "containrrr/watchtower")
+
+			URL, err := auth.GetAuthURL(challenge, imageRef)
 			Expect(err).NotTo(HaveOccurred())
-			Expect(res).To(Equal(expected))
+			Expect(URL).To(Equal(expected))
 		})
-		It("should create a valid auth url object based on the challenge header supplied", func() {
-			input := `bearer realm="https://ghcr.io/token"`
-			res, err := auth.GetAuthURL(input, "containrrr/watchtower")
+
+		When("given an invalid challenge header", func() {
+			It("should return an error", func() {
+				challenge := `bearer realm="https://ghcr.io/token"`
+				imageRef, err := ref.ParseNormalizedNamed("containrrr/watchtower")
+				Expect(err).NotTo(HaveOccurred())
+				URL, err := auth.GetAuthURL(challenge, imageRef)
 				Expect(err).To(HaveOccurred())
-			Expect(res).To(BeNil())
+				Expect(URL).To(BeNil())
 			})
 		})
-	When("getting a challenge url", func() {
-		It("should create a valid challenge url object based on the image ref supplied", func() {
-			expected := url.URL{Host: "ghcr.io", Scheme: "https", Path: "/v2/"}
-			Expect(auth.GetChallengeURL("ghcr.io/containrrr/watchtower:latest")).To(Equal(expected))
-		})
-		It("should assume dockerhub if the image ref is not fully qualified", func() {
-			expected := url.URL{Host: "index.docker.io", Scheme: "https", Path: "/v2/"}
-			Expect(auth.GetChallengeURL("containrrr/watchtower:latest")).To(Equal(expected))
-		})
-		It("should convert legacy dockerhub hostnames to index.docker.io", func() {
-			expected := url.URL{Host: "index.docker.io", Scheme: "https", Path: "/v2/"}
-			Expect(auth.GetChallengeURL("docker.io/containrrr/watchtower:latest")).To(Equal(expected))
-			Expect(auth.GetChallengeURL("registry-1.docker.io/containrrr/watchtower:latest")).To(Equal(expected))
-		})
-	})
-	When("getting the auth scope from an image name", func() {
+
+		When("deriving the auth scope from an image name", func() {
 			It("should prepend official dockerhub images with \"library/\"", func() {
-			Expect(auth.GetScopeFromImageName("docker.io/registry", "index.docker.io")).To(Equal("library/registry"))
-			Expect(auth.GetScopeFromImageName("docker.io/registry", "docker.io")).To(Equal("library/registry"))
-
-			Expect(auth.GetScopeFromImageName("registry", "index.docker.io")).To(Equal("library/registry"))
-			Expect(auth.GetScopeFromImageName("watchtower", "registry-1.docker.io")).To(Equal("library/watchtower"))
-
+				Expect(getScopeFromImageAuthURL("registry")).To(Equal("library/registry"))
+				Expect(getScopeFromImageAuthURL("docker.io/registry")).To(Equal("library/registry"))
+				Expect(getScopeFromImageAuthURL("index.docker.io/registry")).To(Equal("library/registry"))
 			})
 			It("should not include vanity hosts\"", func() {
-			Expect(auth.GetScopeFromImageName("docker.io/containrrr/watchtower", "index.docker.io")).To(Equal("containrrr/watchtower"))
-			Expect(auth.GetScopeFromImageName("index.docker.io/containrrr/watchtower", "index.docker.io")).To(Equal("containrrr/watchtower"))
+				Expect(getScopeFromImageAuthURL("docker.io/containrrr/watchtower")).To(Equal("containrrr/watchtower"))
+				Expect(getScopeFromImageAuthURL("index.docker.io/containrrr/watchtower")).To(Equal("containrrr/watchtower"))
 			})
 			It("should not destroy three segment image names\"", func() {
-			Expect(auth.GetScopeFromImageName("piksel/containrrr/watchtower", "index.docker.io")).To(Equal("containrrr/watchtower"))
-			Expect(auth.GetScopeFromImageName("piksel/containrrr/watchtower", "ghcr.io")).To(Equal("piksel/containrrr/watchtower"))
+				Expect(getScopeFromImageAuthURL("piksel/containrrr/watchtower")).To(Equal("piksel/containrrr/watchtower"))
+				Expect(getScopeFromImageAuthURL("ghcr.io/piksel/containrrr/watchtower")).To(Equal("piksel/containrrr/watchtower"))
 			})
-		It("should not add \"library/\" for one segment image names if they're not on dockerhub", func() {
-			Expect(auth.GetScopeFromImageName("ghcr.io/watchtower", "ghcr.io")).To(Equal("watchtower"))
-			Expect(auth.GetScopeFromImageName("watchtower", "ghcr.io")).To(Equal("watchtower"))
+			It("should not prepend library/ to image names if they're not on dockerhub", func() {
+				Expect(getScopeFromImageAuthURL("ghcr.io/watchtower")).To(Equal("watchtower"))
+				Expect(getScopeFromImageAuthURL("ghcr.io/containrrr/watchtower")).To(Equal("containrrr/watchtower"))
+			})
+		})
+		It("should not crash when an empty field is received", func() {
+			input := `bearer realm="https://ghcr.io/token",service="ghcr.io",scope="repository:user/image:pull",`
+			imageRef, err := ref.ParseNormalizedNamed("containrrr/watchtower")
+			Expect(err).NotTo(HaveOccurred())
+			res, err := auth.GetAuthURL(input, imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(res).NotTo(BeNil())
+		})
+		It("should not crash when a field without a value is received", func() {
+			input := `bearer realm="https://ghcr.io/token",service="ghcr.io",scope="repository:user/image:pull",valuelesskey`
+			imageRef, err := ref.ParseNormalizedNamed("containrrr/watchtower")
+			Expect(err).NotTo(HaveOccurred())
+			res, err := auth.GetAuthURL(input, imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(res).NotTo(BeNil())
+		})
+	})
+
+	Describe("GetChallengeURL", func() {
+		It("should create a valid challenge url object based on the image ref supplied", func() {
+			expected := url.URL{Host: "ghcr.io", Scheme: "https", Path: "/v2/"}
+			imageRef, _ := ref.ParseNormalizedNamed("ghcr.io/containrrr/watchtower:latest")
+			Expect(auth.GetChallengeURL(imageRef)).To(Equal(expected))
+		})
+		It("should assume Docker Hub for image refs with no explicit registry", func() {
+			expected := url.URL{Host: "index.docker.io", Scheme: "https", Path: "/v2/"}
+			imageRef, _ := ref.ParseNormalizedNamed("containrrr/watchtower:latest")
+			Expect(auth.GetChallengeURL(imageRef)).To(Equal(expected))
+		})
+		It("should use index.docker.io if the image ref specifies docker.io", func() {
+			expected := url.URL{Host: "index.docker.io", Scheme: "https", Path: "/v2/"}
+			imageRef, _ := ref.ParseNormalizedNamed("docker.io/containrrr/watchtower:latest")
+			Expect(auth.GetChallengeURL(imageRef)).To(Equal(expected))
 		})
 	})
 })
+
+var scopeImageRegexp = MatchRegexp("^repository:[a-z0-9]+(/[a-z0-9]+)*:pull$")
+
+func getScopeFromImageAuthURL(imageName string) string {
+	normalizedRef, _ := ref.ParseNormalizedNamed(imageName)
+	challenge := `bearer realm="https://dummy.host/token",service="dummy.host",scope="repository:user/image:pull"`
+	URL, _ := auth.GetAuthURL(challenge, normalizedRef)
+
+	scope := URL.Query().Get("scope")
+	Expect(scopeImageRegexp.Match(scope)).To(BeTrue())
+	return strings.Replace(scope[11:], ":pull", "", 1)
+}

pkg/registry/digest/digest.go

@@ -6,15 +6,16 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+
 	"github.com/containrrr/watchtower/internal/meta"
 	"github.com/containrrr/watchtower/pkg/registry/auth"
 	"github.com/containrrr/watchtower/pkg/registry/manifest"
 	"github.com/containrrr/watchtower/pkg/types"
 	"github.com/sirupsen/logrus"
-	"net"
-	"net/http"
-	"strings"
-	"time"
 )
 
 // ContentDigestHeader is the key for the key-value pair containing the digest header
@@ -93,16 +94,18 @@ func GetDigest(url string, token string) (string, error) {
 	req, _ := http.NewRequest("HEAD", url, nil)
 	req.Header.Set("User-Agent", meta.UserAgent)
 
-	if token != "" {
-		logrus.WithField("token", token).Trace("Setting request token")
-	} else {
+	if token == "" {
 		return "", errors.New("could not fetch token")
 	}
 
+	// CREDENTIAL: Uncomment to log the request token
+	// logrus.WithField("token", token).Trace("Setting request token")
+
 	req.Header.Add("Authorization", token)
 	req.Header.Add("Accept", "application/vnd.docker.distribution.manifest.v2+json")
 	req.Header.Add("Accept", "application/vnd.docker.distribution.manifest.list.v2+json")
 	req.Header.Add("Accept", "application/vnd.docker.distribution.manifest.v1+json")
+	req.Header.Add("Accept", "application/vnd.oci.image.index.v1+json")
 
 	logrus.WithField("url", url).Debug("Doing a HEAD request to fetch a digest")
 

pkg/registry/helpers/helpers.go

@@ -1,36 +1,28 @@
 package helpers
 
 import (
-	"fmt"
-	url2 "net/url"
+	"github.com/distribution/reference"
 )
 
-// ConvertToHostname strips a url from everything but the hostname part
-func ConvertToHostname(url string) (string, string, error) {
-	urlWithSchema := fmt.Sprintf("x://%s", url)
-	u, err := url2.Parse(urlWithSchema)
-	if err != nil {
-		return "", "", err
-	}
-	hostName := u.Hostname()
-	port := u.Port()
+// domains for Docker Hub, the default registry
+const (
+	DefaultRegistryDomain       = "docker.io"
+	DefaultRegistryHost         = "index.docker.io"
+	LegacyDefaultRegistryDomain = "index.docker.io"
+)
 
-	return hostName, port, err
-}
-
-// NormalizeRegistry makes sure variations of DockerHubs registry
-func NormalizeRegistry(registry string) (string, error) {
-	hostName, port, err := ConvertToHostname(registry)
+// GetRegistryAddress parses an image name
+// and returns the address of the specified registry
+func GetRegistryAddress(imageRef string) (string, error) {
+	normalizedRef, err := reference.ParseNormalizedNamed(imageRef)
 	if err != nil {
 		return "", err
 	}
 
-	if hostName == "registry-1.docker.io" || hostName == "docker.io" {
-		hostName = "index.docker.io"
-	}
+	address := reference.Domain(normalizedRef)
 
-	if port != "" {
-		return fmt.Sprintf("%s:%s", hostName, port), nil
+	if address == DefaultRegistryDomain {
+		address = DefaultRegistryHost
 	}
-	return hostName, nil
+	return address, nil
 }

pkg/registry/helpers/helpers_test.go

@@ -1,9 +1,10 @@
 package helpers
 
 import (
+	"testing"
+
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-	"testing"
 )
 
 func TestHelpers(t *testing.T) {
@@ -12,20 +13,25 @@ func TestHelpers(t *testing.T) {
 }
 
 var _ = Describe("the helpers", func() {
-
-	When("converting an url to a hostname", func() {
-		It("should return docker.io given docker.io/containrrr/watchtower:latest", func() {
-			host, port, err := ConvertToHostname("docker.io/containrrr/watchtower:latest")
-			Expect(err).NotTo(HaveOccurred())
-			Expect(host).To(Equal("docker.io"))
-			Expect(port).To(BeEmpty())
+	Describe("GetRegistryAddress", func() {
+		It("should return error if passed empty string", func() {
+			_, err := GetRegistryAddress("")
+			Expect(err).To(HaveOccurred())
 		})
+		It("should return index.docker.io for image refs with no explicit registry", func() {
+			Expect(GetRegistryAddress("watchtower")).To(Equal("index.docker.io"))
+			Expect(GetRegistryAddress("containrrr/watchtower")).To(Equal("index.docker.io"))
 		})
-	When("normalizing the registry information", func() {
-		It("should return index.docker.io given docker.io", func() {
-			out, err := NormalizeRegistry("docker.io/containrrr/watchtower:latest")
-			Expect(err).NotTo(HaveOccurred())
-			Expect(out).To(Equal("index.docker.io"))
+		It("should return index.docker.io for image refs with docker.io domain", func() {
+			Expect(GetRegistryAddress("docker.io/watchtower")).To(Equal("index.docker.io"))
+			Expect(GetRegistryAddress("docker.io/containrrr/watchtower")).To(Equal("index.docker.io"))
+		})
+		It("should return the host if passed an image name containing a local host", func() {
+			Expect(GetRegistryAddress("henk:80/watchtower")).To(Equal("henk:80"))
+			Expect(GetRegistryAddress("localhost/watchtower")).To(Equal("localhost"))
+		})
+		It("should return the server address if passed a fully qualified image name", func() {
+			Expect(GetRegistryAddress("github.com/containrrr/config")).To(Equal("github.com"))
 		})
 	})
 })

pkg/registry/manifest/manifest.go

@@ -1,42 +1,41 @@
 package manifest
 
 import (
+	"errors"
 	"fmt"
-	"github.com/containrrr/watchtower/pkg/registry/auth"
+	url2 "net/url"
+
 	"github.com/containrrr/watchtower/pkg/registry/helpers"
 	"github.com/containrrr/watchtower/pkg/types"
-	ref "github.com/docker/distribution/reference"
+	ref "github.com/distribution/reference"
 	"github.com/sirupsen/logrus"
-	url2 "net/url"
-	"strings"
 )
 
 // BuildManifestURL from raw image data
 func BuildManifestURL(container types.Container) (string, error) {
-
-	normalizedName, err := ref.ParseNormalizedNamed(container.ImageName())
+	normalizedRef, err := ref.ParseDockerRef(container.ImageName())
 	if err != nil {
 		return "", err
 	}
+	normalizedTaggedRef, isTagged := normalizedRef.(ref.NamedTagged)
+	if !isTagged {
+		return "", errors.New("Parsed container image ref has no tag: " + normalizedRef.String())
+	}
 
-	host, err := helpers.NormalizeRegistry(normalizedName.String())
-	img, tag := ExtractImageAndTag(strings.TrimPrefix(container.ImageName(), host+"/"))
+	host, _ := helpers.GetRegistryAddress(normalizedTaggedRef.Name())
+	img, tag := ref.Path(normalizedTaggedRef), normalizedTaggedRef.Tag()
 
 	logrus.WithFields(logrus.Fields{
 		"image":      img,
 		"tag":        tag,
-		"normalized": normalizedName,
+		"normalized": normalizedTaggedRef.Name(),
 		"host":       host,
 	}).Debug("Parsing image ref")
 
 	if err != nil {
 		return "", err
 	}
-	img = auth.GetScopeFromImageName(img, host)
 
-	if !strings.Contains(img, "/") {
-		img = "library/" + img
-	}
 	url := url2.URL{
 		Scheme: "https",
 		Host:   host,
@@ -44,24 +43,3 @@ func BuildManifestURL(container types.Container) (string, error) {
 	}
 	return url.String(), nil
 }
-
-// ExtractImageAndTag from a concatenated string
-func ExtractImageAndTag(imageName string) (string, string) {
-	var img string
-	var tag string
-
-	if strings.Contains(imageName, ":") {
-		parts := strings.Split(imageName, ":")
-		if len(parts) > 2 {
-			img = parts[0]
-			tag = strings.Join(parts[1:], ":")
-		} else {
-			img = parts[0]
-			tag = parts[1]
-		}
-	} else {
-		img = imageName
-		tag = "latest"
-	}
-	return img, tag
-}

pkg/registry/manifest/manifest_test.go

@@ -1,13 +1,14 @@
 package manifest_test
 
 import (
+	"testing"
+	"time"
+
 	"github.com/containrrr/watchtower/internal/actions/mocks"
 	"github.com/containrrr/watchtower/pkg/registry/manifest"
 	apiTypes "github.com/docker/docker/api/types"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-	"testing"
-	"time"
 )
 
 func TestManifest(t *testing.T) {
@@ -16,60 +17,58 @@ func TestManifest(t *testing.T) {
 }
 
 var _ = Describe("the manifest module", func() {
-	mockId := "mock-id"
+	Describe("BuildManifestURL", func() {
+		It("should return a valid url given a fully qualified image", func() {
+			imageRef := "ghcr.io/containrrr/watchtower:mytag"
+			expected := "https://ghcr.io/v2/containrrr/watchtower/manifests/mytag"
+
+			URL, err := buildMockContainerManifestURL(imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(URL).To(Equal(expected))
+		})
+		It("should assume Docker Hub for image refs with no explicit registry", func() {
+			imageRef := "containrrr/watchtower:latest"
+			expected := "https://index.docker.io/v2/containrrr/watchtower/manifests/latest"
+
+			URL, err := buildMockContainerManifestURL(imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(URL).To(Equal(expected))
+		})
+		It("should assume latest for image refs with no explicit tag", func() {
+			imageRef := "containrrr/watchtower"
+			expected := "https://index.docker.io/v2/containrrr/watchtower/manifests/latest"
+
+			URL, err := buildMockContainerManifestURL(imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(URL).To(Equal(expected))
+		})
+		It("should not prepend library/ for single-part container names in registries other than Docker Hub", func() {
+			imageRef := "docker-registry.domain/imagename:latest"
+			expected := "https://docker-registry.domain/v2/imagename/manifests/latest"
+
+			URL, err := buildMockContainerManifestURL(imageRef)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(URL).To(Equal(expected))
+		})
+		It("should throw an error on pinned images", func() {
+			imageRef := "docker-registry.domain/imagename@sha256:daf7034c5c89775afe3008393ae033529913548243b84926931d7c84398ecda7"
+			URL, err := buildMockContainerManifestURL(imageRef)
+			Expect(err).To(HaveOccurred())
+			Expect(URL).To(BeEmpty())
+		})
+	})
+})
+
+func buildMockContainerManifestURL(imageRef string) (string, error) {
+	imageInfo := apiTypes.ImageInspect{
+		RepoTags: []string{
+			imageRef,
+		},
+	}
+	mockID := "mock-id"
 	mockName := "mock-container"
 	mockCreated := time.Now()
+	mock := mocks.CreateMockContainerWithImageInfo(mockID, mockName, imageRef, mockCreated, imageInfo)
 
-	When("building a manifest url", func() {
-		It("should return a valid url given a fully qualified image", func() {
-			expected := "https://ghcr.io/v2/containrrr/watchtower/manifests/latest"
-			imageInfo := apiTypes.ImageInspect{
-				RepoTags: []string{
-					"ghcr.io/k6io/operator:latest",
-				},
-			}
-			mock := mocks.CreateMockContainerWithImageInfo(mockId, mockName, "ghcr.io/containrrr/watchtower:latest", mockCreated, imageInfo)
-			res, err := manifest.BuildManifestURL(mock)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(res).To(Equal(expected))
-		})
-		It("should assume dockerhub for non-qualified images", func() {
-			expected := "https://index.docker.io/v2/containrrr/watchtower/manifests/latest"
-			imageInfo := apiTypes.ImageInspect{
-				RepoTags: []string{
-					"containrrr/watchtower:latest",
-				},
-			}
-
-			mock := mocks.CreateMockContainerWithImageInfo(mockId, mockName, "containrrr/watchtower:latest", mockCreated, imageInfo)
-			res, err := manifest.BuildManifestURL(mock)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(res).To(Equal(expected))
-		})
-		It("should assume latest for images that lack an explicit tag", func() {
-			expected := "https://index.docker.io/v2/containrrr/watchtower/manifests/latest"
-			imageInfo := apiTypes.ImageInspect{
-
-				RepoTags: []string{
-					"containrrr/watchtower",
-				},
-			}
-
-			mock := mocks.CreateMockContainerWithImageInfo(mockId, mockName, "containrrr/watchtower", mockCreated, imageInfo)
-
-			res, err := manifest.BuildManifestURL(mock)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(res).To(Equal(expected))
-		})
-		It("should combine the tag name and digest pinning into one digest, given multiple colons", func() {
-			in := "containrrr/watchtower:latest@sha256:daf7034c5c89775afe3008393ae033529913548243b84926931d7c84398ecda7"
-			image, tag := "containrrr/watchtower", "latest@sha256:daf7034c5c89775afe3008393ae033529913548243b84926931d7c84398ecda7"
-
-			imageOut, tagOut := manifest.ExtractImageAndTag(in)
-
-			Expect(imageOut).To(Equal(image))
-			Expect(tagOut).To(Equal(tag))
-		})
-	})
-
-})
+	return manifest.BuildManifestURL(mock)
+}

pkg/registry/registry.go

@@ -3,7 +3,7 @@ package registry
 import (
 	"github.com/containrrr/watchtower/pkg/registry/helpers"
 	watchtowerTypes "github.com/containrrr/watchtower/pkg/types"
-	ref "github.com/docker/distribution/reference"
+	ref "github.com/distribution/reference"
 	"github.com/docker/docker/api/types"
 	log "github.com/sirupsen/logrus"
 )
@@ -19,7 +19,9 @@ func GetPullOptions(imageName string) (types.ImagePullOptions, error) {
 	if auth == "" {
 		return types.ImagePullOptions{}, nil
 	}
-	log.Tracef("Got auth value: %s", auth)
+
+	// CREDENTIAL: Uncomment to log docker config auth
+	// log.Tracef("Got auth value: %s", auth)
 
 	return types.ImagePullOptions{
 		RegistryAuth:  auth,
@@ -41,17 +43,17 @@ func DefaultAuthHandler() (string, error) {
 // Will return false if behavior for container is unknown.
 func WarnOnAPIConsumption(container watchtowerTypes.Container) bool {
 
-	normalizedName, err := ref.ParseNormalizedNamed(container.ImageName())
+	normalizedRef, err := ref.ParseNormalizedNamed(container.ImageName())
 	if err != nil {
 		return true
 	}
 
-	containerHost, err := helpers.NormalizeRegistry(normalizedName.String())
+	containerHost, err := helpers.GetRegistryAddress(normalizedRef.Name())
 	if err != nil {
 		return true
 	}
 
-	if containerHost == "index.docker.io" || containerHost == "ghcr.io" {
+	if containerHost == helpers.DefaultRegistryHost || containerHost == "ghcr.io" {
 		return true
 	}
 

pkg/registry/registry_test.go

@@ -23,11 +23,9 @@ var _ = Describe("Registry", func() {
 		})
 		When("Given a container with an image explicitly from dockerhub", func() {
 			It("should want to warn", func() {
-				Expect(testContainerWithImage("registry-1.docker.io/docker:latest")).To(BeTrue())
 				Expect(testContainerWithImage("index.docker.io/docker:latest")).To(BeTrue())
 				Expect(testContainerWithImage("docker.io/docker:latest")).To(BeTrue())
 			})
-
 		})
 		When("Given a container with an image from some other registry", func() {
 			It("should not want to warn", func() {

pkg/registry/trust.go

@@ -5,13 +5,12 @@ import (
 	"encoding/json"
 	"errors"
 	"os"
-	"strings"
 
+	"github.com/containrrr/watchtower/pkg/registry/helpers"
 	cliconfig "github.com/docker/cli/cli/config"
 	"github.com/docker/cli/cli/config/configfile"
 	"github.com/docker/cli/cli/config/credentials"
 	"github.com/docker/cli/cli/config/types"
-	"github.com/docker/distribution/reference"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -19,7 +18,7 @@ import (
 // loaded from environment variables or docker config
 // as available in that order
 func EncodedAuth(ref string) (string, error) {
-	auth, err := EncodedEnvAuth(ref)
+	auth, err := EncodedEnvAuth()
 	if err != nil {
 		auth, err = EncodedConfigAuth(ref)
 	}
@@ -29,7 +28,7 @@ func EncodedAuth(ref string) (string, error) {
 // EncodedEnvAuth returns an encoded auth config for the given registry
 // loaded from environment variables
 // Returns an error if authentication environment variables have not been set
-func EncodedEnvAuth(ref string) (string, error) {
+func EncodedEnvAuth() (string, error) {
 	username := os.Getenv("REPO_USER")
 	password := os.Getenv("REPO_PASS")
 	if username != "" && password != "" {
@@ -37,8 +36,11 @@ func EncodedEnvAuth(ref string) (string, error) {
 			Username: username,
 			Password: password,
 		}
-		log.Debugf("Loaded auth credentials for user %s on registry %s", auth.Username, ref)
-		log.Tracef("Using auth password %s", auth.Password)
+    
+		log.Debugf("Loaded auth credentials for registry user %s from environment", auth.Username)
+		// CREDENTIAL: Uncomment to log REPO_PASS environment variable
+		// log.Tracef("Using auth password %s", auth.Password)
+
 		return EncodeAuth(auth)
 	}
 	return "", errors.New("registry auth environment variables (REPO_USER, REPO_PASS) not set")
@@ -48,19 +50,20 @@ func EncodedEnvAuth(ref string) (string, error) {
 // loaded from the docker config
 // Returns an empty string if credentials cannot be found for the referenced server
 // The docker config must be mounted on the container
-func EncodedConfigAuth(ref string) (string, error) {
-	server, err := ParseServerAddress(ref)
+func EncodedConfigAuth(imageRef string) (string, error) {
+	server, err := helpers.GetRegistryAddress(imageRef)
 	if err != nil {
-		log.Errorf("Unable to parse the image ref %s", err)
+		log.Errorf("Could not get registry from image ref %s", imageRef)
 		return "", err
 	}
+
 	configDir := os.Getenv("DOCKER_CONFIG")
 	if configDir == "" {
 		configDir = "/"
 	}
 	configFile, err := cliconfig.Load(configDir)
 	if err != nil {
-		log.Errorf("Unable to find default config file %s", err)
+		log.Errorf("Unable to find default config file: %s", err)
 		return "", err
 	}
 	credStore := CredentialsStore(*configFile)
@@ -70,23 +73,12 @@ func EncodedConfigAuth(ref string) (string, error) {
 		log.WithField("config_file", configFile.Filename).Debugf("No credentials for %s found", server)
 		return "", nil
 	}
-	log.Debugf("Loaded auth credentials for user %s, on registry %s, from file %s", auth.Username, ref, configFile.Filename)
-	log.Tracef("Using auth password %s", auth.Password)
+	log.Debugf("Loaded auth credentials for user %s, on registry %s, from file %s", auth.Username, server, configFile.Filename)
+	// CREDENTIAL: Uncomment to log docker config password
+	// log.Tracef("Using auth password %s", auth.Password)
 	return EncodeAuth(auth)
 }
 
-// ParseServerAddress extracts the server part from a container image ref
-func ParseServerAddress(ref string) (string, error) {
-
-	parsedRef, err := reference.Parse(ref)
-	if err != nil {
-		return ref, err
-	}
-
-	parts := strings.Split(parsedRef.String(), "/")
-	return parts[0], nil
-}
-
 // CredentialsStore returns a new credentials store based
 // on the settings provided in the configuration file.
 func CredentialsStore(configFile configfile.ConfigFile) credentials.Store {

pkg/registry/trust_test.go

@@ -1,22 +1,17 @@
 package registry
 
 import (
+	"os"
+
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-	"os"
 )
 
-var _ = Describe("Testing with Ginkgo", func() {
-	It("encoded env auth_ should return an error if repo envs are unset", func() {
-		_ = os.Unsetenv("REPO_USER")
-		_ = os.Unsetenv("REPO_PASS")
-
-		_, err := EncodedEnvAuth("")
-		Expect(err).To(HaveOccurred())
-	})
-	It("encoded env auth_ should return auth hash if repo envs are set", func() {
+var _ = Describe("Registry credential helpers", func() {
+	Describe("EncodedAuth", func() {
+		It("should return repo credentials from env when set", func() {
 			var err error
-		expectedHash := "eyJ1c2VybmFtZSI6ImNvbnRhaW5ycnItdXNlciIsInBhc3N3b3JkIjoiY29udGFpbnJyci1wYXNzIn0="
+			expected := "eyJ1c2VybmFtZSI6ImNvbnRhaW5ycnItdXNlciIsInBhc3N3b3JkIjoiY29udGFpbnJyci1wYXNzIn0="
 
 			err = os.Setenv("REPO_USER", "containrrr-user")
 			Expect(err).NotTo(HaveOccurred())
@@ -24,11 +19,24 @@ var _ = Describe("Testing with Ginkgo", func() {
 			err = os.Setenv("REPO_PASS", "containrrr-pass")
 			Expect(err).NotTo(HaveOccurred())
 
-		config, err := EncodedEnvAuth("")
-		Expect(config).To(Equal(expectedHash))
+			config, err := EncodedEnvAuth()
+			Expect(config).To(Equal(expected))
 			Expect(err).NotTo(HaveOccurred())
 		})
-	It("encoded config auth_ should return an error if file is not present", func() {
+	})
+
+	Describe("EncodedEnvAuth", func() {
+		It("should return an error if repo envs are unset", func() {
+			_ = os.Unsetenv("REPO_USER")
+			_ = os.Unsetenv("REPO_PASS")
+
+			_, err := EncodedEnvAuth()
+			Expect(err).To(HaveOccurred())
+		})
+	})
+
+	Describe("EncodedConfigAuth", func() {
+		It("should return an error if file is not present", func() {
 			var err error
 
 			err = os.Setenv("DOCKER_CONFIG", "/dev/null/should-fail")
@@ -36,30 +44,6 @@ var _ = Describe("Testing with Ginkgo", func() {
 
 			_, err = EncodedConfigAuth("")
 			Expect(err).To(HaveOccurred())
-
 		})
-	/*
-	 * TODO:
-	 * This part only confirms that it still works in the same way as it did
-	 * with the old version of the docker api client sdk. I'd say that
-	 * ParseServerAddress likely needs to be elaborated a bit to default to
-	 * dockerhub in case no server address was provided.
-	 *
-	 * ++ @simskij, 2019-04-04
-	 */
-	It("parse server address_ should return error if passed empty string", func() {
-
-		_, err := ParseServerAddress("")
-		Expect(err).To(HaveOccurred())
-	})
-	It("parse server address_ should return the organization part if passed an image name missing server name", func() {
-
-		val, _ := ParseServerAddress("containrrr/config")
-		Expect(val).To(Equal("containrrr"))
-	})
-	It("parse server address_ should return the server name if passed a fully qualified image name", func() {
-
-		val, _ := ParseServerAddress("github.com/containrrrr/config")
-		Expect(val).To(Equal("github.com"))
 	})
 })

pkg/sorter/sort.go

@@ -2,13 +2,14 @@ package sorter
 
 import (
 	"fmt"
-	"github.com/containrrr/watchtower/pkg/container"
 	"time"
+
+	"github.com/containrrr/watchtower/pkg/types"
 )
 
 // ByCreated allows a list of Container structs to be sorted by the container's
 // created date.
-type ByCreated []container.Container
+type ByCreated []types.Container
 
 func (c ByCreated) Len() int      { return len(c) }
 func (c ByCreated) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
@@ -34,18 +35,18 @@ func (c ByCreated) Less(i, j int) bool {
 // the front of the list while containers with links will be sorted after all
 // of their dependencies. This sort order ensures that linked containers can
 // be started in the correct order.
-func SortByDependencies(containers []container.Container) ([]container.Container, error) {
+func SortByDependencies(containers []types.Container) ([]types.Container, error) {
 	sorter := dependencySorter{}
 	return sorter.Sort(containers)
 }
 
 type dependencySorter struct {
-	unvisited []container.Container
+	unvisited []types.Container
 	marked    map[string]bool
-	sorted    []container.Container
+	sorted    []types.Container
 }
 
-func (ds *dependencySorter) Sort(containers []container.Container) ([]container.Container, error) {
+func (ds *dependencySorter) Sort(containers []types.Container) ([]types.Container, error) {
 	ds.unvisited = containers
 	ds.marked = map[string]bool{}
 
@@ -58,7 +59,7 @@ func (ds *dependencySorter) Sort(containers []container.Container) ([]container.
 	return ds.sorted, nil
 }
 
-func (ds *dependencySorter) visit(c container.Container) error {
+func (ds *dependencySorter) visit(c types.Container) error {
 
 	if _, ok := ds.marked[c.Name()]; ok {
 		return fmt.Errorf("circular reference to %s", c.Name())
@@ -84,7 +85,7 @@ func (ds *dependencySorter) visit(c container.Container) error {
 	return nil
 }
 
-func (ds *dependencySorter) findUnvisited(name string) *container.Container {
+func (ds *dependencySorter) findUnvisited(name string) *types.Container {
 	for _, c := range ds.unvisited {
 		if c.Name() == name {
 			return &c
@@ -94,7 +95,7 @@ func (ds *dependencySorter) findUnvisited(name string) *container.Container {
 	return nil
 }
 
-func (ds *dependencySorter) removeUnvisited(c container.Container) {
+func (ds *dependencySorter) removeUnvisited(c types.Container) {
 	var idx int
 	for i := range ds.unvisited {
 		if ds.unvisited[i].Name() == c.Name() {

pkg/types/container.go

@@ -1,8 +1,10 @@
 package types
 
 import (
-	"github.com/docker/docker/api/types"
 	"strings"
+
+	"github.com/docker/docker/api/types"
+	dc "github.com/docker/docker/api/types/container"
 )
 
 // ImageID is a hash string representing a container image
@@ -50,7 +52,7 @@ type Container interface {
 	SafeImageID() ImageID
 	ImageName() string
 	Enabled() (bool, bool)
-	IsMonitorOnly() bool
+	IsMonitorOnly(UpdateParams) bool
 	Scope() (string, bool)
 	Links() []string
 	ToRestart() bool
@@ -62,4 +64,15 @@ type Container interface {
 	GetLifecyclePostCheckCommand() string
 	GetLifecyclePreUpdateCommand() string
 	GetLifecyclePostUpdateCommand() string
+	VerifyConfiguration() error
+	SetStale(bool)
+	IsStale() bool
+	IsNoPull(UpdateParams) bool
+	SetLinkedToRestarting(bool)
+	IsLinkedToRestarting() bool
+	PreUpdateTimeout() int
+	PostUpdateTimeout() int
+	IsRestarting() bool
+	GetCreateConfig() *dc.Config
+	GetCreateHostConfig() *dc.HostConfig
 }

pkg/types/update_params.go

@@ -11,6 +11,8 @@ type UpdateParams struct {
 	NoRestart       bool
 	Timeout         time.Duration
 	MonitorOnly     bool
+	NoPull			bool
 	LifecycleHooks  bool
 	RollingRestart  bool
+	LabelPrecedence bool
 }

scripts/build-tplprev.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cd $(git rev-parse --show-toplevel)
+
+cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" ./docs/assets/
+
+GOARCH=wasm GOOS=js go build -o ./docs/assets/tplprev.wasm ./tplprev

scripts/contnet-tests.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+set -e
+
+function exit_env_err() {
+  >&2 echo "Required environment variable not set: $1"
+  exit 1
+}
+
+if [ -z "$VPN_SERVICE_PROVIDER" ]; then exit_env_err "VPN_SERVICE_PROVIDER"; fi
+if [ -z "$OPENVPN_USER" ]; then exit_env_err "OPENVPN_USER"; fi
+if [ -z "$OPENVPN_PASSWORD" ]; then exit_env_err "OPENVPN_PASSWORD"; fi
+# if [ -z "$SERVER_COUNTRIES" ]; then exit_env_err "SERVER_COUNTRIES"; fi
+
+
+export SERVER_COUNTRIES=${SERVER_COUNTRIES:"Sweden"}
+REPO_ROOT="$(git rev-parse --show-toplevel)"
+COMPOSE_FILE="$REPO_ROOT/dockerfiles/container-networking/docker-compose.yml"
+DEFAULT_WATCHTOWER="$REPO_ROOT/watchtower"
+WATCHTOWER="$*"
+WATCHTOWER=${WATCHTOWER:-$DEFAULT_WATCHTOWER}
+echo "repo root path is $REPO_ROOT"
+echo "watchtower path is $WATCHTOWER"
+echo "compose file path is $COMPOSE_FILE"
+
+echo; echo "=== Forcing network container producer update..."
+
+echo "Pull previous version of gluetun..."
+docker pull qmcgaw/gluetun:v3.34.3
+echo "Fake new version of gluetun by retagging v3.34.4 as v3.35.0..."
+docker tag qmcgaw/gluetun:v3.34.3  qmcgaw/gluetun:v3.35.0
+
+echo; echo "=== Creating containers..."
+
+docker compose -p "wt-contnet" -f "$COMPOSE_FILE" up -d
+
+echo; echo "=== Running watchtower"
+$WATCHTOWER --run-once
+
+echo; echo "=== Removing containers..."
+
+docker compose -p "wt-contnet" -f "$COMPOSE_FILE" down

tplprev/main.go

@@ -0,0 +1,49 @@
+//go:build !wasm
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/containrrr/watchtower/internal/meta"
+	"github.com/containrrr/watchtower/pkg/notifications/preview"
+	"github.com/containrrr/watchtower/pkg/notifications/preview/data"
+)
+
+func main() {
+	fmt.Fprintf(os.Stderr, "watchtower/tplprev %v\n\n", meta.Version)
+
+	var states string
+	var entries string
+
+	flag.StringVar(&states, "states", "cccuuueeekkktttfff", "sCanned, Updated, failEd, sKipped, sTale, Fresh")
+	flag.StringVar(&entries, "entries", "ewwiiidddd", "Fatal,Error,Warn,Info,Debug,Trace")
+
+	flag.Parse()
+
+	if len(flag.Args()) < 1 {
+		fmt.Fprintln(os.Stderr, "Missing required argument TEMPLATE")
+		flag.Usage()
+		os.Exit(1)
+		return
+	}
+
+	input, err := os.ReadFile(flag.Arg(0))
+	if err != nil {
+
+		fmt.Fprintf(os.Stderr, "Failed to read template file %q: %v\n", flag.Arg(0), err)
+		os.Exit(1)
+		return
+	}
+
+	result, err := preview.Render(string(input), data.StatesFromString(states), data.LevelsFromString(entries))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to read template file %q: %v\n", flag.Arg(0), err)
+		os.Exit(1)
+		return
+	}
+
+	fmt.Println(result)
+}

tplprev/main_wasm.go

@@ -0,0 +1,62 @@
+//go:build wasm
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/containrrr/watchtower/internal/meta"
+	"github.com/containrrr/watchtower/pkg/notifications/preview"
+	"github.com/containrrr/watchtower/pkg/notifications/preview/data"
+
+	"syscall/js"
+)
+
+func main() {
+	fmt.Println("watchtower/tplprev v" + meta.Version)
+
+	js.Global().Set("WATCHTOWER", js.ValueOf(map[string]any{
+		"tplprev": js.FuncOf(jsTplPrev),
+	}))
+	<-make(chan bool)
+
+}
+
+func jsTplPrev(this js.Value, args []js.Value) any {
+
+	if len(args) < 3 {
+		return "Requires 3 arguments passed"
+	}
+
+	input := args[0].String()
+
+	statesArg := args[1]
+	var states []data.State
+
+	if statesArg.Type() == js.TypeString {
+		states = data.StatesFromString(statesArg.String())
+	} else {
+		for i := 0; i < statesArg.Length(); i++ {
+			state := data.State(statesArg.Index(i).String())
+			states = append(states, state)
+		}
+	}
+
+	levelsArg := args[2]
+	var levels []data.LogLevel
+
+	if levelsArg.Type() == js.TypeString {
+		levels = data.LevelsFromString(statesArg.String())
+	} else {
+		for i := 0; i < levelsArg.Length(); i++ {
+			level := data.LogLevel(levelsArg.Index(i).String())
+			levels = append(levels, level)
+		}
+	}
+
+	result, err := preview.Render(input, states, levels)
+	if err != nil {
+		return "Error: " + err.Error()
+	}
+	return result
+}