基于Docker构建Jenkins CI平台

1、部署gitlab

1.1 部署gitlab

docker run -d \
  --name gitlab \
  -p 8443:443 \
  -p 9999:80 \
  -p 9998:22 \
  -v $PWD/config:/etc/gitlab \
  -v $PWD/logs:/var/log/gitlab \
  -v $PWD/data:/var/opt/gitlab \
  -v /etc/localtime:/etc/localtime \
  lizhenliang/gitlab-ce-zh:latest

访问地址：http://IP:9999

初次会先设置管理员密码 ，然后登陆，默认管理员用户名root，密码就是刚设置的。

1.2 创建项目，提交测试代码

进入后先创建项目，提交代码，以便后面测试。

git clone http://192.168.31.62:9999/root/java-demo.git
git add .
git config --global user.email "you@example.com"
git config --global user.name "Your Name"
git commit -m 'all'
git push origin master

2、部署Harbor镜像仓库

2.1 安装docker与docker-compose

# wget http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
# yum install docker-ce -y
# systemctl start docker
# systemctl enable docker

2.2 解压离线包部署

# tar zxvf harbor-offline-installer-v1.9.1.tgz               下载链接https://pan.baidu.com/s/1tFyDsfbfNeLf9YQSRrOIog
# cd harbor
# vi harbor.yml
hostname: 192.168.31.70
# ./prepare
# ./install.sh

2.3 在Jenkins主机配置Docker可信任

由于habor未配置https，还需要在docker配置可信任。

# cat /etc/docker/daemon.json 
{"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
  "insecure-registries": ["192.168.31.70"]
}
# systemctl restart docker

3、部署Jenkins

3.1 准备JDK和Maven环境

# tar zxvf jdk-8u45-linux-x64.tar.gz
# mv jdk1.8.0_45 /usr/local/jdk
# tar zxf apache-maven-3.5.0-bin.tar.gz
# mv apache-maven-3.5.0 /usr/local/maven

docker run -d --name jenkins -p 80:8080 -p 50000:50000 -u root  \
   -v /opt/jenkins_home:/var/jenkins_home \
   -v /var/run/docker.sock:/var/run/docker.sock   \
   -v /usr/bin/docker:/usr/bin/docker \
   -v /usr/local/apache-maven-3.5.0:/usr/local/maven \
   -v /usr/local/jdk1.8.0_45:/usr/local/jdk \
   -v /etc/localtime:/etc/localtime \
   --name jenkins jenkins/jenkins:lts

使用/root/.ssh中私钥访问gitlab

3.2 安装插件

系统管理-->插件管理-->Installed

搜索git/pipeline，点击安装。

4、发布测试

4.1 添加参数化构建

This project is parameterized -> String Parameter

Name：Branch # 变量名，下面脚本中调用

Default Value：master # 默认分支

Description：发布的代码分支 # 描述

4.2 Pipeline脚本

#!/usr/bin/env groovy

def registry = "192.168.31.70"
def project = "welcome"
def app_name = "demo"
def image_name = "${registry}/${project}/${app_name}:${Branch}-${BUILD_NUMBER}"
def git_address = "git@192.168.31.62:/home/git/java-demo.git"
def docker_registry_auth = "b37a147e-5217-4359-8372-17fd9a8edfcc"
def git_auth = "b3e33c8b-c7e0-47b9-baee-d7629d71f154"

pipeline {
    agent any
    stages {
        stage('拉取代码'){
            steps {
              checkout([$class: 'GitSCM', branches: [[name: '${Branch}']], userRemoteConfigs: [[credentialsId: "${git_auth}", url: "${git_address}"]]])
            }
        }

        stage('代码编译'){
           steps {
             sh """
                JAVA_HOME=/usr/local/jdk
                PATH=$JAVA_HOME/bin:/usr/local/maven/bin:$PATH
                mvn clean package -Dmaven.test.skip=true
                """ 
           }
        }

        stage('构建镜像'){
           steps {
                withCredentials([usernamePassword(credentialsId: "${docker_registry_auth}", passwordVariable: 'password', usernameVariable: 'username')]) {
                sh """
                  echo '
                    FROM ${registry}/library/tomcat:v1
                    LABEL maitainer 张三
                    RUN rm -rf /usr/local/tomcat/webapps/*
                    ADD target/*.war /usr/local/tomcat/webapps/ROOT.war
                  ' > Dockerfile
                  docker build -t ${image_name} .
                  docker login -u ${username} -p '${password}' ${registry}
                  docker push ${image_name}
                """
                }
           } 
        }

        stage('部署到Docker'){
           steps {
              sh """
              REPOSITORY=${image_name}
              docker rm -f tomcat-java-demo |true
              docker container run -d --name tomcat-java-demo -p 88:8080 ${image_name}
              """
            }
        }
    }
}

4.3 添加凭据

1、添加拉取git代码凭据，并获取id替换到上面git_auth变量值。

2、添加拉取harbor镜像凭据，并获取id替换到上面docker_registry_auth变量值。