mirror of
https://github.com/mag37/dockcheck.git
synced 2026-02-14 23:38:15 +01:00
Added option -b to enable image backups pre pull. (#242)
* added new variables, options and setup * datecheck function rewrite * moved the cleanup and prune logic to always run. Changed some wording on messages. * added function to print currently backed up images * Patched bugfix to not recreate stopped containers * changed the RepoDigests grab and logic * Moved the backup - cleanup to always trigger if -b option is used. Added -p&-b warning. * version bump and readme fixes
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51
README.md
51
README.md
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@ -13,15 +13,22 @@
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</p>
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<h2 align="center">CLI tool to automate docker image updates or notifying when updates are available.</h2>
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<h3 align="center">selective updates, exclude containers, custom labels, notification plugins, prune when done etc.</h3>
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<h3 align="center">selective updates, include/exclude containers, image backups, custom labels, notification plugins, prune when done etc.</h3>
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<h4 align="center">:whale: Docker Hub pull limit :chart_with_downwards_trend: not an issue for checks but for actual pulls - <a href="#whale-docker-hub-pull-limit-chart_with_downwards_trend-not-an-issue-for-checks-but-for-actual-pulls">read more</a></h4>
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<h4 align="center">:whale: Docker Hub pull limit :chart_with_downwards_trend: not an issue for checks only for actual pulls - <a href="#whale-docker-hub-pull-limit-chart_with_downwards_trend-not-an-issue-for-checks-but-for-actual-pulls">read more</a></h4>
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<h5 align="center">For Podman - see the fork <a href="https://github.com/sudo-kraken/podcheck">sudo-kraken/podcheck</a>!</h4>
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___
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## Changelog
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- **v0.7.5**:
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- Added new option **BackupForDays**; `-b N` and `-B`:
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- Backup an image before pulling a new version for easy rollback in case of breakage.
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- Removes backed up images older than *N* days.
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- List currently backed up images with `-B`.
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- Fixes:
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- Bugfix for `-s` *Stopped* to not recreate stopped containers after update.
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- **v0.7.4**:
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- Added new option `-R`:
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- Will skip container recreation after pulling images.
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@ -38,16 +45,6 @@ ___
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- List reformatting for "available updates" numbering to easier highlight and copy:
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- Padded with zero, changed `)` to `-`, example: `02 - homer`
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- Can be selected by writing `2,3,4` or `02,03,04`.
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- **v0.7.1**:
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- Added support for multiple notifications using the same template
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- Added support for notification output format
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- Added support for file output
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- Added optional configuration variables per channel to (replace `<channel>` with any channel name):
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- `<channel>_TEMPLATE` : Specify a template
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- `<channel>_SKIPSNOOZE` : Skip snooze
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- `<channel>_CONTAINERSONLY` : Only notify for docker container related updates
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- `<channel>_ALLOWEMPTY` : Always send notifications, even when empty
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- `<channel>_OUTPUT` : Define output format
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___
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@ -61,6 +58,8 @@ Example: dockcheck.sh -y -x 10 -d 10 -e nextcloud,heimdall
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Options:
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-a|y Automatic updates, without interaction.
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-b N Enable image backups and sets number of days to keep from pruning.
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-B List currently backed up images, then exit.
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-c D Exports metrics as prom file for the prometheus node_exporter. Provide the collector textfile directory.
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-d N Only update to new images that are N+ days old. Lists too recent with +prefix and age. 2xSlower.
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-e X Exclude containers, separated by comma.
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@ -86,18 +85,19 @@ Options:
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### Basic example:
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```
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$ ./dockcheck.sh
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. . .
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[##################################################] 5/5
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Containers on latest version:
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glances
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homer
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Containers with updates available:
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1) adguardhome
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2) syncthing
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3) whoogle-search
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01) adguardhome
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02) syncthing
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03) whoogle-search
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Choose what containers to update:
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Enter number(s) separated by comma, [a] for all - [q] to quit:
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Enter number(s) separated by comma, [a] for all - [q] to quit: 1,2
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```
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Then it proceeds to run `pull` and `up -d` on every container with updates.
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After the updates are complete, you'll get prompted if you'd like to prune dangling images.
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@ -245,6 +245,23 @@ The `urls.list` file is just an example and I'd gladly see that people contribut
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Pass `-x N` where N is number of subprocesses allowed, experiment in your environment to find a suitable max!
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Change the default value by editing the `MaxAsync=N` variable in `dockcheck.sh`. To disable the subprocess function set `MaxAsync=0`.
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## Image Backups; `-b N` to backup previous images as custom (retagged) images for easy rollback
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When the option `BackupForDays` is set **dockcheck** will store the image being updated as a backup, retagged with a different name and removed due to age configured (*BackupForDays*) in a future run.
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Let's say we're updating `b4bz/homer:latest` - then before replacing the current image it will be retagged with the name `dockcheck/homer:2025-10-26_1132_latest`
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- `dockcheck` as repo name to not interfere with others.
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- `homer` is the image.
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- `2025-10-26_1132` is the time when running the script.
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- `latest` is the tag of the image.
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Then if an update breaks, you could restore the image by stopping the container, delete the new image, eg. `docker rmi b4bz/homer:latest`, then retag the backup as latest `docker tag dockcheck/homer:<date>_latest b4bz/homer:latest`.
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After that, start the container again (now with the backup image active) and it will be updated as usual next time you run dockcheck or other updates.
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The backed up images will be removed if they're older than *BackupForDays* value (passed as `-b N` or set in the `dockcheck.config` with `BackupForDays=N`) and then pruned.
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If configured for eg. 7 days, force earlier cleaning by just passing a lower number of days, eg. `-b 2` to clean everything older than 2 days.
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Backed up images will not be removed if neither `-b` flag nor `BackupForDays` config variable is set.
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Use the capital option `-B` to list currently backed up images. Or list all images with `docker images`.
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To manually remove any backed up images, do `docker rmi dockcheck/homer:2025-10-26_1132_latest`.
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## Extra plugins and tools:
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@ -28,6 +28,7 @@
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#CurlRetryCount=3 # Max number of curl retries
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#CurlConnectTimeout=5 # Time to wait for curl to establish a connection before failing
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#DisplaySourcedFiles=false # Display what files are being sourced/used
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#BackupForDays=7 # Enable backups of images and removes backups older than N days.
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### Notify settings
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## All commented values are examples only. Modify as needed.
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128
dockcheck.sh
128
dockcheck.sh
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@ -1,6 +1,6 @@
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#!/usr/bin/env bash
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VERSION="v0.7.4"
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# ChangeNotes: New option -R to pull without recreation. Fixes: value too great error, legacy cleanups.
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VERSION="v0.7.5"
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# ChangeNotes: New option -b N to backup image before pulling for easy rollback.
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Github="https://github.com/mag37/dockcheck"
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RawUrl="https://raw.githubusercontent.com/mag37/dockcheck/main/dockcheck.sh"
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@ -34,6 +34,8 @@ Help() {
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echo
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echo "Options:"
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echo "-a|y Automatic updates, without interaction."
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echo "-b N Enable image backups and sets number of days to keep from pruning."
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echo "-B List currently backed up images, then exit."
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echo "-c Exports metrics as prom file for the prometheus node_exporter. Provide the collector textfile directory."
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echo "-d N Only update to new images that are N+ days old. Lists too recent with +prefix and age. 2xSlower."
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echo "-e X Exclude containers, separated by comma."
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@ -58,6 +60,12 @@ Help() {
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echo "Project source: $Github"
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}
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# Print current backups function
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print_backups() {
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printf "\n%b---%b Currently backed up images %b---%b\n\n" "$c_teal" "$c_blue" "$c_teal" "$c_reset"
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docker images | sed -ne '/^REPOSITORY/p' -ne '/^dockcheck/p'
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}
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# Initialise variables
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Timeout=${Timeout:-10}
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MaxAsync=${MaxAsync:-1}
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@ -77,6 +85,7 @@ Stopped=${Stopped:-""}
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CollectorTextFileDirectory=${CollectorTextFileDirectory:-}
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Exclude=${Exclude:-}
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DaysOld=${DaysOld:-}
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BackupForDays=${BackupForDays:-}
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OnlySpecific=${OnlySpecific:-false}
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SpecificContainer=${SpecificContainer:-""}
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SkipRecreate=${SkipRecreate:-false}
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@ -97,9 +106,15 @@ c_blue="\033[0;34m"
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c_teal="\033[0;36m"
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c_reset="\033[0m"
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while getopts "ayfFhiIlmMnprsuvc:e:d:t:x:R" options; do
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# Timestamps
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RunTimestamp=$(date +'%Y-%m-%d_%H%M')
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RunEpoch=$(date +'%s')
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while getopts "ayb:BfFhiIlmMnprsuvc:e:d:t:x:R" options; do
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case "${options}" in
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a|y) AutoMode=true ;;
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b) BackupForDays="${OPTARG}" ;;
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B) print_backups; exit 0 ;;
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c) CollectorTextFileDirectory="${OPTARG}" ;;
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d) DaysOld=${OPTARG} ;;
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e) Exclude=${OPTARG} ;;
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@ -156,6 +171,13 @@ if [[ -n "$DaysOld" ]]; then
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exit 2
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fi
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fi
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if [[ -n "$BackupForDays" ]]; then
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if ! [[ $BackupForDays =~ ^[0-9]+$ ]]; then
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printf "-b argument given (%s) is not a number.\n" "$BackupForDays"
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exit 2
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fi
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[[ "$AutoPrune" == true ]] && printf "%bWARNING: When -b option is used, -p has no function.%b\n" "$c_yellow" "$c_reset"
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fi
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if [[ -n "$CollectorTextFileDirectory" ]]; then
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if ! [[ -d $CollectorTextFileDirectory ]]; then
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printf "The directory (%s) does not exist.\n" "$CollectorTextFileDirectory"
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@ -196,11 +218,11 @@ self_update() {
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printf "\n%s\n" "Pulling the latest version."
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git pull --force || { printf "%bGit error,%b manually pull/clone.\n" "$c_red" "$c_reset"; return; }
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printf "\n%s\n" "--- starting over with the updated version ---"
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cd - || { printf "%bPath error.%b\n" "$c_red"; return; }
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cd - || { printf "%bPath error.%b\n" "$c_red" "$c_reset"; return; }
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exec "$ScriptPath" "${ScriptArgs[@]}" # run the new script with old arguments
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exit 0 # exit the old instance
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else
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cd - || { printf "%bPath error.%b\n" "$c_red"; return; }
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cd - || { printf "%bPath error.%b\n" "$c_red" "$c_reset"; return; }
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self_update_curl
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fi
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}
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@ -209,6 +231,7 @@ choosecontainers() {
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while [[ -z "${ChoiceClean:-}" ]]; do
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read -r -p "Enter number(s) separated by comma, [a] for all - [q] to quit: " Choice
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if [[ "$Choice" =~ [qQnN] ]]; then
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[[ -n "${BackupForDays:-}" ]] && remove_backups
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exit 0
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elif [[ "$Choice" =~ [aAyY] ]]; then
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SelectedUpdates=( "${GotUpdates[@]}" )
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@ -228,16 +251,39 @@ choosecontainers() {
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}
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datecheck() {
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ImageDate=$("$regbin" -v error image inspect "$RepoUrl" --format='{{.Created}}' | cut -d" " -f1)
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ImageDate="$1"
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DaysMax="$2"
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ImageEpoch=$(date -d "$ImageDate" +%s 2>/dev/null) || ImageEpoch=$(date -f "%Y-%m-%d" -j "$ImageDate" +%s)
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ImageAge=$(( ( $(date +%s) - ImageEpoch )/86400 ))
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if [[ "$ImageAge" -gt "$DaysOld" ]]; then
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ImageAge=$(( ( RunEpoch - ImageEpoch )/86400 ))
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if [[ "$ImageAge" -gt "$DaysMax" ]]; then
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return 0
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else
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return 1
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fi
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}
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remove_backups() {
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IFS=$'\n'
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CleanupCount=0
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for backup_img in $(docker images --format "{{.Repository}} {{.Tag}}" | sed -n '/^dockcheck/p'); do
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repo_name=${backup_img% *}
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backup_tag=${backup_img#* }
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backup_date=${backup_tag%%_*}
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# UNTAGGING HERE
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if datecheck "$backup_date" "$BackupForDays"; then
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[[ "$CleanupCount" == 0 ]] && printf "\n%bRemoving backed up images older then %s days.%b\n" "$c_blue" "$BackupForDays" "$c_reset"
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docker rmi "${repo_name}:${backup_tag}" && ((CleanupCount+=1))
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fi
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done
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unset IFS
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if [[ "$CleanupCount" == 0 ]]; then
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printf "\nNo backup images to remove.\n"
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else
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[[ "$CleanupCount" -gt 1 ]] && b_phrase="backups" || b_phrase="backup"
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printf "\n%b%s%b %s removed.%b\n" "$c_green" "$CleanupCount" "$c_teal" "$b_phrase" "$c_reset"
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fi
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}
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progress_bar() {
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QueCurrent="$1"
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QueTotal="$2"
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@ -443,7 +489,7 @@ check_image() {
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if [[ "$LocalHash" == *"$RegHash"* ]]; then
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printf "%s\n" "NoUpdates $i"
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else
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if [[ -n "${DaysOld:-}" ]] && ! datecheck; then
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if [[ -n "${DaysOld:-}" ]] && ! datecheck $("$regbin" -v error image inspect "$RepoUrl" --format='{{.Created}}' | cut -d" " -f1) "$DaysOld" ; then
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printf "%s\n" "NoUpdates +$i ${ImageAge}d"
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else
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printf "%s\n" "GotUpdates $i"
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@ -457,7 +503,7 @@ check_image() {
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# Make required functions and variables available to subprocesses
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export -f check_image datecheck
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export Excludes_string="${Excludes[*]:-}" # Can only export scalar variables
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export t_out regbin RepoUrl DaysOld DRunUp jqbin OnlyLabel
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export t_out regbin RepoUrl DaysOld DRunUp jqbin OnlyLabel RunTimestamp RunEpoch
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# Check for POSIX xargs with -P option, fallback without async
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if (echo "test" | xargs -P 2 >/dev/null 2>&1) && [[ "$MaxAsync" != 0 ]]; then
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@ -540,11 +586,25 @@ if [[ -n "${GotUpdates:-}" ]]; then
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for i in "${SelectedUpdates[@]}"; do
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((CurrentQue+=1))
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printf "\n%bNow updating (%s/%s): %b%s%b\n" "$c_teal" "$CurrentQue" "$NumberofUpdates" "$c_blue" "$i" "$c_reset"
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ContLabels=$(docker inspect "$i" --format '{{json .Config.Labels}}')
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ContImage=$(docker inspect "$i" --format='{{.Config.Image}}')
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ContPath=$($jqbin -r '."com.docker.compose.project.working_dir"' <<< "$ContLabels")
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ContConfig=$(docker inspect "$i" --format '{{json .}}')
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ContImage=$($jqbin -r '."Config"."Image"' <<< "$ContConfig")
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ImageId=$($jqbin -r '."Image"' <<< "$ContConfig")
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ContPath=$($jqbin -r '."Config"."Labels"."com.docker.compose.project.working_dir"' <<< "$ContConfig")
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[[ "$ContPath" == "null" ]] && ContPath=""
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# Add new backup tag prior to pulling if option is set
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if [[ -n "${BackupForDays:-}" ]]; then
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ImageConfig=$(docker image inspect "$ImageId" --format '{{ json . }}')
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ContRepoDigests=$($jqbin -r '.RepoDigests[0]' <<< "$ImageConfig")
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[[ "$ContRepoDigests" == "null" ]] && ContRepoDigests=""
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ContRepo=${ContImage%:*}
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ContApp=${ContRepo#*/}
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[[ "$ContImage" =~ ":" ]] && ContTag=${ContImage#*:} || ContTag="latest"
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BackupName="dockcheck/${ContApp}:${RunTimestamp}_${ContTag}"
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docker tag "$ImageId" "$BackupName"
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printf "%b%s backed up as %s%b\n" "$c_teal" "$i" "$BackupName" "$c_reset"
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fi
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|
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# Checking if compose-values are empty - hence started with docker run
|
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if [[ -z "$ContPath" ]]; then
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if [[ "$DRunUp" == true ]]; then
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|
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@ -556,7 +616,13 @@ if [[ -n "${GotUpdates:-}" ]]; then
|
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continue
|
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fi
|
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|
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docker pull "$ContImage" || { printf "\n%bDocker error, exiting!%b\n" "$c_red" "$c_reset" ; exit 1; }
|
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if docker pull "$ContImage"; then
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# Removal of the <none>-tag image left behind from backup
|
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if [[ ! -z "${ContRepoDigests:-}" ]] && [[ -n "${BackupForDays:-}" ]]; then docker rmi "$ContRepoDigests"; fi
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else
|
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printf "\n%bDocker error, exiting!%b\n" "$c_red" "$c_reset" ; exit 1
|
||||
fi
|
||||
|
||||
done
|
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printf "\n%bDone pulling updates.%b\n" "$c_green" "$c_reset"
|
||||
|
||||
|
|
@ -569,8 +635,8 @@ if [[ -n "${GotUpdates:-}" ]]; then
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((CurrentQue+=1))
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unset CompleteConfs
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# Extract labels and metadata
|
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ContLabels=$(docker inspect "$i" --format '{{json .Config.Labels}}')
|
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ContImage=$(docker inspect "$i" --format='{{.Config.Image}}')
|
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ContConfig=$(docker inspect "$i" --format '{{json .}}')
|
||||
ContLabels=$($jqbin -r '."Config"."Labels"' <<< "$ContConfig")
|
||||
ContPath=$($jqbin -r '."com.docker.compose.project.working_dir"' <<< "$ContLabels")
|
||||
[[ "$ContPath" == "null" ]] && ContPath=""
|
||||
ContConfigFile=$($jqbin -r '."com.docker.compose.project.config_files"' <<< "$ContLabels")
|
||||
|
|
@ -583,14 +649,22 @@ if [[ -n "${GotUpdates:-}" ]]; then
|
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[[ "$ContRestartStack" == "null" ]] && ContRestartStack=""
|
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ContOnlySpecific=$($jqbin -r '."mag37.dockcheck.only-specific-container"' <<< "$ContLabels")
|
||||
[[ "$ContOnlySpecific" == "null" ]] && ContRestartStack=""
|
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ContStateRunning=$($jqbin -r '."State"."Running"' <<< "$ContConfig")
|
||||
[[ "$ContStateRunning" == "null" ]] && ContStateRunning=""
|
||||
|
||||
if [[ "$ContStateRunning" == "true" ]]; then
|
||||
printf "\n%bNow recreating (%s/%s): %b%s%b\n" "$c_teal" "$CurrentQue" "$NumberofUpdates" "$c_blue" "$i" "$c_reset"
|
||||
else
|
||||
printf "\n%bSkipping recreation of %b%s%b as it's not running.%b\n" "$c_yellow" "$c_blue" "$i" "$c_yellow" "$c_reset"
|
||||
continue
|
||||
fi
|
||||
|
||||
printf "\n%bNow recreating (%s/%s): %b%s%b\n" "$c_teal" "$CurrentQue" "$NumberofUpdates" "$c_blue" "$i" "$c_reset"
|
||||
# Checking if compose-values are empty - hence started with docker run
|
||||
[[ -z "$ContPath" ]] && { echo "Not a compose container, skipping."; continue; }
|
||||
|
||||
# cd to the compose-file directory to account for people who use relative volumes
|
||||
cd "$ContPath" || { printf "\n%bPath error - skipping%b %s" "$c_red" "$c_reset" "$i"; continue; }
|
||||
## Reformatting path + multi compose
|
||||
# Reformatting path + multi compose
|
||||
if [[ $ContConfigFile == '/'* ]]; then
|
||||
CompleteConfs=$(for conf in ${ContConfigFile//,/ }; do printf -- "-f %s " "$conf"; done)
|
||||
else
|
||||
|
|
@ -610,14 +684,22 @@ if [[ -n "${GotUpdates:-}" ]]; then
|
|||
fi
|
||||
done
|
||||
fi
|
||||
if [[ "$AutoPrune" == false ]] && [[ "$AutoMode" == false ]]; then printf "\n"; read -rep "Would you like to prune all dangling images? y/[n]: " AutoPrune; fi
|
||||
if [[ "$AutoPrune" == true ]] || [[ "$AutoPrune" =~ [yY] ]]; then printf "\nAuto pruning.."; docker image prune -f; fi
|
||||
printf "\n%bAll done!%b\n" "$c_green" "$c_reset"
|
||||
printf "\n%bAll updates done!%b\n" "$c_green" "$c_reset"
|
||||
|
||||
# Trigger pruning only when backup-function is not used
|
||||
if [[ -z "${BackupForDays:-}" ]]; then
|
||||
if [[ "$AutoPrune" == false ]] && [[ "$AutoMode" == false ]]; then printf "\n"; read -rep "Would you like to prune all dangling images? y/[n]: " AutoPrune; fi
|
||||
if [[ "$AutoPrune" == true ]] || [[ "$AutoPrune" =~ [yY] ]]; then printf "\nAuto pruning.."; docker image prune -f; fi
|
||||
fi
|
||||
|
||||
else
|
||||
printf "\nNo updates installed, exiting.\n"
|
||||
printf "\nNo updates installed.\n"
|
||||
fi
|
||||
else
|
||||
printf "\nNo updates available, exiting.\n"
|
||||
printf "\nNo updates available.\n"
|
||||
fi
|
||||
|
||||
# Clean up old backup image tags if -b is used
|
||||
[[ -n "${BackupForDays:-}" ]] && remove_backups
|
||||
|
||||
exit 0
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue