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Feat/lifecycle hooks (#351)
* feat(update): add lifecycle hooks to the update action * fix(ci): add bash tests for lifecycle-hooks to the ci workflow * fix(ci): move integration tests to an isolated step * fix(ci): fix malformed all-contributors json * fix(ci): disable automatic bash test until we figure out a reasonable way to run it in circleci
This commit is contained in:
Simon Aronsson
GitHub
parent
874180a518
commit
bfae38dbf8
12 changed files with 499 additions and 73 deletions
208
scripts/lifecycle-tests.sh
Executable file
208
scripts/lifecycle-tests.sh
Executable file
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#!/usr/bin/env bash
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set -e
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IMAGE=server
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CONTAINER=server
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LINKED_IMAGE=linked
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LINKED_CONTAINER=linked
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WATCHTOWER_INTERVAL=2
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function remove_container {
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docker kill $1 >> /dev/null || true && docker rm -v $1 >> /dev/null || true
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}
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function cleanup {
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# Do cleanup on exit or error
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echo "Final cleanup"
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sleep 2
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remove_container $CONTAINER
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remove_container $LINKED_CONTAINER
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pkill -9 -f watchtower >> /dev/null || true
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}
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trap cleanup EXIT
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DEFAULT_WATCHTOWER="$(dirname "${BASH_SOURCE[0]}")/../watchtower"
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WATCHTOWER=$1
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WATCHTOWER=${WATCHTOWER:-$DEFAULT_WATCHTOWER}
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echo "watchtower path is $WATCHTOWER"
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##################################################################################
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##### PREPARATION ################################################################
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##################################################################################
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# Create Dockerfile template
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DOCKERFILE=$(cat << EOF
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FROM node:alpine
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LABEL com.centurylinklabs.watchtower.lifecycle.pre-update="cat /opt/test/value.txt"
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LABEL com.centurylinklabs.watchtower.lifecycle.post-update="echo image > /opt/test/value.txt"
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ENV IMAGE_TIMESTAMP=TIMESTAMP
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WORKDIR /opt/test
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ENTRYPOINT ["/usr/local/bin/node", "/opt/test/server.js"]
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EXPOSE 8888
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RUN mkdir -p /opt/test && echo "default" > /opt/test/value.txt
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COPY server.js /opt/test/server.js
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EOF
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)
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# Create temporary directory to build docker image
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TMP_DIR="/tmp/watchtower-commands-test"
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mkdir -p $TMP_DIR
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# Create simple http server
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cat > $TMP_DIR/server.js << EOF
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const http = require("http");
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const fs = require("fs");
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http.createServer(function(request, response) {
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const fileContent = fs.readFileSync("/opt/test/value.txt");
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response.writeHead(200, {"Content-Type": "text/plain"});
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response.write(fileContent);
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response.end();
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}).listen(8888, () => { console.log('server is listening on 8888'); });
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EOF
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function builddocker {
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TIMESTAMP=$(date +%s)
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echo "Building image $TIMESTAMP"
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echo "${DOCKERFILE/TIMESTAMP/$TIMESTAMP}" > $TMP_DIR/Dockerfile
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docker build $TMP_DIR -t $IMAGE >> /dev/null
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}
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# Start watchtower
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echo "Starting watchtower"
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$WATCHTOWER -i $WATCHTOWER_INTERVAL --no-pull --stop-timeout 2s --enable-lifecycle-hooks $CONTAINER $LINKED_CONTAINER &
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sleep 3
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echo "#################################################################"
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echo "##### TEST CASE 1: Execute commands from base image"
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echo "#################################################################"
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# Build base image
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builddocker
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# Run container
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docker run -d -p 0.0.0.0:8888:8888 --name $CONTAINER $IMAGE:latest >> /dev/null
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sleep 1
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echo "Container $CONTAINER is runnning"
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# Test default value
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RESP=$(curl -s http://localhost:8888)
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if [ $RESP != "default" ]; then
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echo "Default value of container response is invalid" 1>&2
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exit 1
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fi
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# Build updated image to trigger watchtower update
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builddocker
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WAIT_AMOUNT=$(($WATCHTOWER_INTERVAL * 3))
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echo "Wait for $WAIT_AMOUNT seconds"
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sleep $WAIT_AMOUNT
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# Test value after post-update-command
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RESP=$(curl -s http://localhost:8888)
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if [[ $RESP != "image" ]]; then
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echo "Value of container response is invalid. Expected: image. Actual: $RESP"
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exit 1
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fi
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remove_container $CONTAINER
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echo "#################################################################"
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echo "##### TEST CASE 2: Execute commands from container and base image"
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echo "#################################################################"
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# Build base image
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builddocker
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# Run container
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docker run -d -p 0.0.0.0:8888:8888 \
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--label=com.centurylinklabs.watchtower.lifecycle.post-update="echo container > /opt/test/value.txt" \
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--name $CONTAINER $IMAGE:latest >> /dev/null
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sleep 1
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echo "Container $CONTAINER is runnning"
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# Test default value
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RESP=$(curl -s http://localhost:8888)
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if [ $RESP != "default" ]; then
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echo "Default value of container response is invalid" 1>&2
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exit 1
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fi
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# Build updated image to trigger watchtower update
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builddocker
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WAIT_AMOUNT=$(($WATCHTOWER_INTERVAL * 3))
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echo "Wait for $WAIT_AMOUNT seconds"
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sleep $WAIT_AMOUNT
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# Test value after post-update-command
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RESP=$(curl -s http://localhost:8888)
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if [[ $RESP != "container" ]]; then
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echo "Value of container response is invalid. Expected: container. Actual: $RESP"
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exit 1
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fi
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remove_container $CONTAINER
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echo "#################################################################"
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echo "##### TEST CASE 3: Execute commands with a linked container"
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echo "#################################################################"
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# Tag the current image to keep a version for the linked container
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docker tag $IMAGE:latest $LINKED_IMAGE:latest
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# Build base image
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builddocker
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# Run container
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docker run -d -p 0.0.0.0:8888:8888 \
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--label=com.centurylinklabs.watchtower.lifecycle.post-update="echo container > /opt/test/value.txt" \
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--name $CONTAINER $IMAGE:latest >> /dev/null
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docker run -d -p 0.0.0.0:8989:8888 \
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--label=com.centurylinklabs.watchtower.lifecycle.post-update="echo container > /opt/test/value.txt" \
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--link $CONTAINER \
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--name $LINKED_CONTAINER $LINKED_IMAGE:latest >> /dev/null
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sleep 1
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echo "Container $CONTAINER and $LINKED_CONTAINER are runnning"
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# Test default value
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RESP=$(curl -s http://localhost:8888)
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if [ $RESP != "default" ]; then
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echo "Default value of container response is invalid" 1>&2
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exit 1
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fi
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# Test default value for linked container
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RESP=$(curl -s http://localhost:8989)
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if [ $RESP != "default" ]; then
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echo "Default value of linked container response is invalid" 1>&2
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exit 1
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fi
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# Build updated image to trigger watchtower update
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builddocker
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WAIT_AMOUNT=$(($WATCHTOWER_INTERVAL * 3))
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echo "Wait for $WAIT_AMOUNT seconds"
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sleep $WAIT_AMOUNT
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# Test value after post-update-command
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RESP=$(curl -s http://localhost:8888)
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if [[ $RESP != "container" ]]; then
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echo "Value of container response is invalid. Expected: container. Actual: $RESP"
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exit 1
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fi
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# Test that linked container did not execute pre/post-update-command
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RESP=$(curl -s http://localhost:8989)
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if [[ $RESP != "default" ]]; then
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echo "Value of linked container response is invalid. Expected: default. Actual: $RESP"
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exit 1
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fi
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