Jenkins Pipeline

一、Jenkinsfile

　该Jenkinsfile使用Blue Ocean生成的框架，然后进行了修改　

pipeline {
  agent any
  stages {
    stage('Pull Code') {
      parallel {
        stage('Pull Code') {
          when {
            expression {
              env.gitlabBranch== null
            }
 
          }
          steps {
            git(url: "${GIT_URL}", branch: "${BRANCH}", credentialsId: 'c7b6f5cf-6dfe-4d8d-b0a6-0f22b51ad1b7')
          }
        }
 
        stage('Pull Code by trigger') {
          when {
            expression {
              env.gitlabBranch!= null
            }
 
          }
          steps {
            git(credentialsId: 'c7b6f5cf-6dfe-4d8d-b0a6-0f22b51ad1b7', branch: "env.gitlabBranch", url: "${GIT_URL}")
            script {
              BRANCH = env.gitlabBranch
            }
 
          }
        }
 
      }
    }
 
    stage('initConfiguration') {
      steps {
        script {
          println "init parameters"
 
          CommitMessage = sh(returnStdout: true, script: "git log -1 --pretty=format:'%h : %an %s'").trim()
 
          CommitID = sh(returnStdout: true, script: "git log -1 --pretty=format:'%h'").trim()
 
          def curDate = sh(returnStdout: true, script: "date '+%Y%m%d-%H%M%S'").trim()
 
          TAG = curDate[0..14] + "-" + CommitID + "-" + BRANCH
        }
 
      }
    }
 
    stage('Build') {
      steps {
        sh """
           echo "Starting Building"
           ${BUILD_COMMAND}
           """
      }
    }
 
    stage('Build Dockerimage') {
      steps {
        withCredentials(bindings: [usernamePassword(credentialsId: '6c3882b8-957c-406f-8141-02c8602ed98a', passwordVariable: 'Password', usernameVariable: 'Username')]) {
          sh """
            cd ${Item_DIR}
            docker build -t ${HARBOR_ADDRESS}/${REGISTRY_DIR}/${IMAGE_NAME}:${TAG} .
            docker login -u ${Username} -p ${Password} ${HARBOR_ADDRESS}
            docker push ${HARBOR_ADDRESS}/${REGISTRY_DIR}/${IMAGE_NAME}:${TAG}
            """
        }
 
      }
    }
 
    stage('Deploy') {
      steps {
        sh """
          echo "deploy"
          kubectl set image ${DEPLOY_TYPE} -l ${DEPLOY_LABEL} ${CONTAINER_NAME}=${HARBOR_ADDRESS}/${REGISTRY_DIR}/${IMAGE_NAME}:${TAG} -n ${NAMESPACE}
          """
      }
    }
 
  }
  environment {
    CommitMessage = ''
    CommitID = ''
    TAG = ''
  }
}

二、Pull Code阶段

parallel：并发执行，该处是自动触发执行或者手动选择执行
BRANCH：git的分支参数，可以在Jenkins中设置
when：执行条件，当env.gitlabBranch为空时，即为手动选择分支执行，反之则是自动触发执行
GIT_URL：代码仓库地址，可以将其直接写入jenkinsfile，或者在Jenkins中设置为参数（Hidden Parameter在Jenkins执行页面不显示）
CredentialsId：Jenkins中凭证的ID，用于拉去gitlab的代码

三、initConfiguration阶段

　　初始化一些参数

CommitMessage/CommitID：获取代码提交时的一些信息，-1获取最近的一条信息
trim()：去掉空格
TAG：制作docker镜像时的tag

四、Build阶段

　　将构建命令提取出来，设置成Jenkins参数形式，方便修改

五、Build Dockerimage阶段

withCredentials：将镜像上传到镜像仓库时，需要镜像仓库的登入信息。可以将登入信息预先写入Jenkins凭证中，通过withCredentials来获取用户名和密码
Item_DIR：具体的构建项目目录
HARBOR_ADDRESS/REGISTRY_DIR/IMAGE_NAME：都可以设置成Jenkins参数，