记录一个jenkinsfile的说明

解释一个为k8s环境部署的jenkinsfile

首先见具体的文档

# 这里的部分是配置变量
# pod 的标签名
def label = "slave-${UUID.randomUUID().toString()}"
# 推送到harbor时和之后容器拉取时镜像的tag
def imageTag = "${BUILD_NUMBER}"
# harbor镜像 url
def dockerRegistryUrl = "10.169.136.38:30002"
# harbor镜像 地址
def imageEndpoint = "other-test/test-jenkins-hook"
# 项目完整镜像地址
def image = "${dockerRegistryUrl}/${imageEndpoint}"

podTemplate(label: label, containers: [
  # jenkins 专用的docker容器镜像生成pod ，默认会自动生成，这里应该是因为内网环境加了harbor
  containerTemplate(name: 'jnlp', image: '10.169.136.38:30002/public/jenkins/inbound-agent:4.11-1', args: '${computer.jnlpmac} ${computer.name}'),
  # nodejs环境pod
  containerTemplate(name: 'node', image: '10.169.136.38:30002/public/node:17.1.0', command: 'cat', ttyEnabled: true),
  # docker 容器环境，用来将镜像推harbor  
  containerTemplate(name: 'docker', image: '10.169.136.38:30002/public/docker:20.10.10', command: 'cat', ttyEnabled: true),
  # kbs环境的镜像，用来执行kubectl命令，进行项目部署
  containerTemplate(name: 'kubectl', image: '10.169.136.38:30002/public/cnych/kubectl:latest', command: 'cat', ttyEnabled: true)
]
# 配置jenkins-slave pod挂载的卷，当云环境里面配置pod模板后，挂载卷以云环境配置为准
, volumes: [
  hostPathVolume(mountPath: '/var/run/docker.sock', hostPath: '/var/run/docker.sock')
]){
  node(label) {
    # 几个git命令 
    def myRepo = checkout scm
    def gitCommit = myRepo.GIT_COMMIT
    def gitBranch = myRepo.GIT_BRANCH
    
    # node 编译打包，因为内网环境有问题，node编译部分去掉了
    stage('代码编译打包') {
      # 从jenkins 的凭据中心 获取nexus账号信息
      withCredentials([string(credentialsId: "Nexus", variable: "NEXUS_AUTH_TOKEN")]){
        container('node') {
          sh """
            echo $PATH
            node -v
            npm -v
            """
        }
      }
    }
    
    # 进行dockers传镜像传到harbor
    stage('构建 Docker 镜像') {
        # 从jenkins 的凭据中心 获取Harbor账号信息，并将账号信息赋给变量
        withCredentials([[$class: 'UsernamePasswordMultiBinding',
            credentialsId: 'Harbor',
            usernameVariable: 'DOCKER_HUB_USER',
            passwordVariable: 'DOCKER_HUB_PASSWORD']]) {
              container('docker') {
                sh """
                   # docker账号登入
                   docker login ${dockerRegistryUrl} -u ${DOCKER_HUB_USER} -p ${DOCKER_HUB_PASSWORD}
                   # 进行docker 镜像构建
                   docker build -t ${image}:${imageTag} ./
                   docker push ${image}:${imageTag}
                   """
              }
        }
    }

    stage('Kubectl 部署') {
      container('kubectl') {
        # 从jenkins 的凭据中心 获取k8s-admin账号信息
        withKubeConfig([credentialsId: "k8s-admin", serverUrl: "https://kubernetes.default"]) {
             sh """
                # 将yaml文件中的需要替换的变量进行替换，变成对应的参数
                sed -i "s#<IMAGE>#${image}#" deploy/deployment_test.yml
                sed -i "s#<IMAGE_TAG>#${imageTag}#" deploy/deployment_test.yml
                # 开始构建pod
                kubectl apply -f deploy/deployment_test.yml
                """
        }
      }
    }
  }
}

参考文档

jenkins官方pipeline 文档- https://www.jenkins.io/zh/doc/book/pipeline/
pipeline构建项目实践-编写podTemplate实现和k8s对接- https://blog.csdn.net/weixin_38320674/article/details/108162684
Kubernetes之标签与Pod控制器详解- https://blog.csdn.net/weixin_45186298/article/details/103975384