mirror of
https://github.com/containrrr/watchtower.git
synced 2025-12-16 15:10:12 +01:00
147 lines
No EOL
4 KiB
Bash
Executable file
147 lines
No EOL
4 KiB
Bash
Executable file
#!/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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WATCHTOWER_INTERVAL=2
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function remove_container {
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docker kill $CONTAINER >> /dev/null || true && docker rm -v $CONTAINER >> /dev/null || true
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}
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function cleanup {
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# Do cleanup on exit or error
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echo "Final cleanup"
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sleep 2
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remove_container
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pkill -9 -f watchtower >> /dev/null || true
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}
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trap cleanup EXIT
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DEFAULT_WATCHTOWER="${GOPATH}/src/github.com/v2tec/watchtower/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.pre-update-command="cat /opt/test/value.txt"
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LABEL com.centurylinklabs.watchtower.post-update-command="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-update-commands $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
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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.post-update-command="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 |