实际应用过程中，一般多分支流水线的方式用得比较多一些，
master 对应 生成环境
develop 对应 测试环境，
将不同分支的代码构建到不同的环境中

添加 Jenkinsfile 文件

Jenkinsfile 内容见：Jenkins Pipeline 流水线 - 完整构建 Pipeline Script 脚本

DevOps/trunk 专门用来放运维脚本

提交 Jenkins 到 SVN
注意代码要放到 trunk,branches 等 分支中

创建多分支流任务

运行

多个 stage 使用不同代理，会在每一步都进行SVN 的切换

完整 pipeline 脚本

pipeline {
    agent { label 'JenkinsAgent' }
    parameters {
      string defaultValue: '4.2', description: '编译版本号', name: 'BUILD_NUMBER' 
    }

    tools {
        maven 'Maven36'  //添加 Maven 工具
    }   
    stages { 
       stage('CheckOut SVN Code') { 
           steps { 
                checkout([$class: 'SubversionSCM', additionalCredentials: [], excludedCommitMessages: '', excludedRegions: '', excludedRevprop: '', excludedUsers: '', filterChangelog: false, ignoreDirPropChanges: false, includedRegions: '', locations: [[cancelProcessOnExternalsFail: true, credentialsId: 'c3b4ef0e-b414-4376-8a21-2e08e1c84dfb', depthOption: 'infinity', ignoreExternalsOption: true, local: '.', remote: 'SVN地址']], quietOperation: true, workspaceUpdater: [$class: 'UpdateUpdater']])  //该脚本由流水线语法自动生成
                echo 'CheckOut SVN Success'         
           } 
       } 
       // Jenkinsfile 的 地址和代码不在同一个仓库下时，需要用这种嵌套的方式，否则，代码刚拉下来，执行第二个 stage 时就被删除了。
       stage('Maven Build') { 
           steps { 
                bat 'mvn clean package -Dmaven.test.skip=true'
                echo 'Maven Build Success'
           } 
       } 

       //Docker 在 3.88服务器
       stage('Docker Build 、Push Repository') {
            steps {
			   #sourceFiles windows下注意 用 \\ 否则可能上传时导致文件找不到。
               sshPublisher(publishers: [sshPublisherDesc(configName: 'DockerPublishSSH', transfers: [sshTransfer(cleanRemote: false, excludes: '', execCommand: '', execTimeout: 120000, flatten: false, makeEmptyDirs: false, noDefaultExcludes: false, patternSeparator: '[, ]+', remoteDirectory: 'PipelineDemo', remoteDirectorySDF: false, removePrefix: '', sourceFiles: 'target/demojenkins.jar'), sshTransfer(cleanRemote: false, excludes: '', execCommand: '''
               cd /opt/jenkins/PipelineDemo
               docker build -t registry.cn-shanghai.aliyuncs.com/vipsoft/vipsoft:${BUILD_NUMBER} .
               docker login -u hi帐号ID@aliyun.com -p 密码 registry.cn-shanghai.aliyuncs.com
               docker push registry.cn-shanghai.aliyuncs.com/vipsoft/vipsoft:${BUILD_NUMBER}''', execTimeout: 120000, flatten: false, makeEmptyDirs: false, noDefaultExcludes: false, patternSeparator: '[, ]+', remoteDirectory: 'PipelineDemo', remoteDirectorySDF: false, removePrefix: '', sourceFiles: 'Dockerfile')], usePromotionTimestamp: false, useWorkspaceInPromotion: false, verbose: true)])

               echo 'Docker  SUCCESS'
            }
        }

        //K8S 在 3.181服务器
        stage('K8S Deployment') {
            steps {
                script {                 
                    def remote = [:]
                    remote.name = 'K8S Server'
                    remote.host = '172.16.3.181'
                    remote.allowAnyHosts = true
                    withCredentials([usernamePassword(credentialsId: 'K8SMaster', passwordVariable: 'password', usernameVariable: 'username')]) {
                        remote.user = "${username}"     // 变量要使用“”双引号
                        remote.password = "${password}" //把凭证中的用户名、密码拿出来给 remote参数 
                    }
                    sshCommand remote: remote, command: "kubectl set image deployment/javademo1 vipsoft=registry.cn-shanghai.aliyuncs.com/vipsoft/vipsoft:${BUILD_NUMBER}" 
                    echo 'K8S Deployment  SUCCESS'
                }
            }
        }
    } 
}