# Docker安装Jenkins

拉取Jenkins镜像 docker pull jenkins/jenkins:lts
新建挂载目录 mkdir -p ~/jenkins_home
修改权限 chown -R 1000 /root/jenkins_home

启动容器

docker run -di \
--name=jenkins \
-p 8080:8080 \
-v /root/jenkins_home/:/var/jenkins_home \
-v /opt/software/jdk1.8.0_181:/opt/software/jdk1.8.0_181 \
-v /opt/software/apache-maven-3.8.6:/opt/software/apache-maven-3.8.6 \
-v $(which docker):/usr/bin/docker \
-v /var/run/docker.sock:/var/run/docker.sock \
jenkins/jenkins:lts

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挂载jenkins_home -v /root/jenkins_home/:/var/jenkins_home
挂载宿主机的java环境 /opt/software/jdk1.8.0_181:/opt/software/jdk1.8.0_181
挂载宿主机的maven环境 -v /opt/software/apache-maven-3.8.6:/opt/software/apache-maven-3.8.6
挂载宿主机的Docker，Jenkis可以使用Docker了 -v $(which docker):/usr/bin/docker -v /var/run/docker.sock:/var/run/docker.sock

页面初始化，插件安装等等

参考，不得不说，人家写的真好，必须点赞 (opens new window)

Jenkins

持续集成 自动化打包、部署、发布

✔️开发本地开发完成
✔️提交代码到Git仓库(gitlab、gitee、github)
✔️Jenkins监听是否有提交
✔️Jenkins拉取Git仓库代码到Jenkins工作目录
✔️Jenkins调用Maven打包，编译等
✔️Jenkins制作Docker镜像
✔️Jenkins上传镜像到镜像库，如Harbor
✔️Jenkins通过SSH登录应用服务器
✔️Jenkins拉取镜像
✔️Jenkins通过运行镜像
✔️Jenkins控制每个应用服务器都启动容器
✔️Jenkins发布完成

所以有了jenkins之后，开发只需要关注开发代码，然后提交就行了。剩下的操作全都交给jenkins处理

DockerCompose

编写docker-compose.yml

version: '3.8'
services:
  ufs-jenkins:
    image: jenkinsci/blueocean
    container_name: jenkins
    restart: always
    user: root
    ports:
      - "8080:8080"
      - "50000:50000"
    volumes:
      - ./jenkins/jenkins_home:/var/jenkins_home
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock

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在./jenkins/jenkins_home目录配置maven的阿里源 setting.xml
登录xx:8080配置Jenkins
- 初始密码，通过 docker logs ufs-jenkins 获取
- 安装插件 Docker Pipeline
准备一个项目，提交到Gitee

项目根目录创建Dockerfile

FROM openjdk:8-jre-alpine
# 将当前目录下的jar包复制到docker容器的/目录下
COPY target/*.jar /app.jar
# 运行过程中创建一个xx.jar文件
RUN touch /app.jar;
 
ENV TZ=Asia/Shanghai JAVA_OPTS="-Xms128m -Xmx256m -Djava.security.egd=file:/dev/./urandom"
ENV PARAMS=""
 
# 声明服务运行在8080端口
EXPOSE 8080
# 指定docker容器启动时运行jar包
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -jar /app.jar $PARAMS" ]

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项目根目录创建Jenkinsfile

pipeline{
    agent any
    environment {
      WS = "${WORKSPACE}"
      IMAGE_NAME = "java-devops-demo"
    }
 
    //定义流水线的加工流程
    stages {
        //流水线的所有阶段
        stage('1.环境检查'){
            steps {
               sh 'pwd && ls -alh'
               sh 'printenv'
               sh 'docker version'
               sh 'java -version'
               sh 'git --version'
            }
        }
 
        stage('2.编译'){
            agent {
                docker {
                    image 'maven:3-alpine'
                    args '-v maven-repository:/root/.m2'
                 }
            }
            steps {
               sh 'pwd && ls -alh'
               sh 'mvn -v'
               sh 'cd ${WS} && mvn clean package -s "/var/jenkins_home/appconfig/maven/settings.xml" -Dmaven.test.skip=true'
            }
        }
 
        stage('3.打包'){
            steps {
               sh 'pwd && ls -alh'
               sh 'docker build -t ${IMAGE_NAME} .'
            }
        }
 
        stage('4.部署'){
            // 删除容器和虚悬镜像
            steps {
               sh 'pwd && ls -alh'
               sh 'docker rm -f ${IMAGE_NAME} && docker rmi $(docker images -q -f dangling=true)'
               sh 'docker run -d -p 8888:8080 --name ${IMAGE_NAME} -v /mydata/logs/${IMAGE_NAME}:/logs/${IMAGE_NAME} ${IMAGE_NAME}'
            }
        }
    }
}

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Jenkins首页新创建流水线
配置流水线 Pipeline script from SCM -> Git -> RepositoryURL...
返回首页 Blue Ocean 选择运行