设置docker-compose环境变量以使用自定义java System.Property正确启动Jenkins。

Question

我有詹金斯码头形象，我想从码头环境放松Jenkins Content Security Policy。

我可以从Jenkins脚本控制台执行此操作：

System.setProperty("hudson.model.DirectoryBrowserSupport.CSP", "default-src 'self'; style-src 'self' 'unsafe-inline';")
System.getProperty("hudson.model.DirectoryBrowserSupport.CSP")

但不是来自docker-compose环境。则docker容器在运行时重新启动。

Docker服务由'jenkins.sh‘脚本运行：

cat /usr/local/bin/jenkins.sh

#! /bin/bash -e

: "${JENKINS_HOME:="/var/jenkins_home"}"
touch "${COPY_REFERENCE_FILE_LOG}" || { echo "Can not write to ${COPY_REFERENCE_FILE_LOG}. Wrong volume permissions?"; exit 1; }
echo "--- Copying files at $(date)" >> "$COPY_REFERENCE_FILE_LOG"
find /usr/share/jenkins/ref/ -type f -exec bash -c '. /usr/local/bin/jenkins-support; for arg; do copy_reference_file "$arg"; done' _ {} +

# if `docker run` first argument start with `--` the user is passing jenkins launcher arguments
if [[ $# -lt 1 ]] || [[ "$1" == "--"* ]]; then

  # read JAVA_OPTS and JENKINS_OPTS into arrays to avoid need for eval (and associated vulnerabilities)
  java_opts_array=()
  while IFS= read -r -d '' item; do
    java_opts_array+=( "$item" )
  done < <([[ $JAVA_OPTS ]] && xargs printf '%s\0' <<<"$JAVA_OPTS")

  jenkins_opts_array=( )
  while IFS= read -r -d '' item; do
    jenkins_opts_array+=( "$item" )
  done < <([[ $JENKINS_OPTS ]] && xargs printf '%s\0' <<<"$JENKINS_OPTS")

  exec java "${java_opts_array[@]}" -jar /usr/share/jenkins/jenkins.war "${jenkins_opts_array[@]}" "$@"
fi

# As argument is not jenkins, assume user want to run his own process, for example a `bash` shell to explore this image
exec "$@"

我的jenkins Dockerfile环境：

ENV JAVA_OPTS="-Xmx2048m"
ENV JENKINS_OPTS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war"

我的docker-compose.yml：

version: '2'
services:
  jenkins:
    build: jenkins
    image: my-jenkins
    container_name: my-jenkins
    environment:
    - JAVA_OPTS="-Xmx2048m"
#    - JENKINS_OPTS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war"
#    - JENKINS_OPTS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war -Dhudson.model.DirectoryBrowserSupport.CSP=\"default-src 'self'; style-src 'self' 'unsafe-inline';\""
#    - JENKINS_OPTS="--logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war -Dhudson.model.DirectoryBrowserSupport.CSP=default-src 'self'; style-src 'self' 'unsafe-inline';"
    ports:
    - "49001:8080"
    - "50000:50000"
    volumes:
    - data-jenkins-home:/var/jenkins_home
    restart: always

volumes:
  data-jenkins-home:

如果上面的任何一行没有注释，Jenkins容器就会被破坏(它将在一两秒内重新启动)。运行抛出：

Mar 02, 2017 11:32:25 AM Main deleteWinstoneTempContents
WARNING: Failed to delete the temporary Winstone file /tmp/winstone/jenkins.war

我看到'jenkins.sh‘正在重新创建JENKINS_OPTS数组。是否可以设置环境变量JENKINS_OPTS以使用脚本正确运行服务？

Answer 1

您可以在创建容器的docker run命令中设置JENKINS_OPTS。例如，此docker run命令显示如何设置JAVA_OPTS和JENKINS_OPTS。它还展示了如何映射jenkins GUI端口(从容器中的8080映射到这里的9090到外部世界)。它还展示了如何定制jenkins home dir (docker卷安装)。

JENKINS_PORT=9090
JENKINS_SLAVE_PORT=50000
JENKINS_DIR=jenkins
IMAGE=whatever

docker run -it \
-d \
--name jenkins42 \
--restart always \
-p $OMN_HOST_IP:$JENKINS_PORT:8080 \
-p $OMN_HOST_IP:$JENKINS_SLAVE_PORT:50000 \
--env JAVA_OPTS="-Dhudson.Main.development=true \
    -Dhudson.footerURL=http://customurl.com \
    -Xms800M -Xmx800M -Xmn400M \
    " \
-v $JENKINS_DIR:/var/jenkins_home \
$VARGS \
$IMAGE