jenkins 如何把docker 镜像推送到k8s集群并应用？

Question

我已经创建好docker镜像了，但是不知道如何连接k8s集群把docker镜像应用到集群中！

Answer 1

已解决

pipeline {
    agent any
    environment {
      GIT_REPOSITORY="xxx"
      K8S_YAML="k8s/test-xxx-webapp.yaml"
      POD_NAME="test-xxx-webapp"
      DOCKER_USERNAME="xxx"
      DOCKER_PWD="xxx
      ALIYUN_DOCKER_HOST = 'xxx'
      ALIYUN_DOCKER_NAMESPACE="com-xxx"
      ALIYUN_DOCKER_REPOSITORY_NAME="webapp-test"
      K8S_CONFIG = credentials('test-xxx-k8s-config-text')
    }
    stages {
        stage("Clone") {
            agent any
            steps {
                echo "1.Clone Stage"
                 // 删除文件夹
                deleteDir()
                git branch: 'test', credentialsId: 'xxx', url: "${GIT_REPOSITORY}"
                script {
                    // 获取git代码tag为docker仓库tag
                    // GIT_TAG = sh(returnStdout: true,script: 'git describe --tags --always').trim()
                    // 获取git提交hash做为docker仓库tag
                    GIT_TAG = sh(returnStdout: true, script: 'git rev-parse --short HEAD').trim()
                    DOCKER_REPOSITORY = "${ALIYUN_DOCKER_HOST}/${ALIYUN_DOCKER_NAMESPACE}/${ALIYUN_DOCKER_REPOSITORY_NAME}"
                    // docker 阿里镜像仓库
                    DOCKER_REPOSITORY_TAG = "${DOCKER_REPOSITORY}:${GIT_TAG}"
                }
            }
        }
        stage("Test") {
            agent any
            steps {
                echo "2.Test Stage"
            }
        }
        stage("Build") {
            agent any
            steps {
                echo "3.Build Docker Image Stage"
                sh "docker build -t ${DOCKER_REPOSITORY_TAG} -f docker/Dockerfile ."
            }
        }
        stage("Push") {
            agent any
            steps {
                echo "4.Push Docker Image Stage"
                //推送Docker镜像，username 跟 password 为 阿里云容器镜像服务的账号密码
                sh "docker login --username=${DOCKER_USERNAME} --password=${DOCKER_PWD} ${ALIYUN_DOCKER_HOST}"

                // 开始推送镜像
                sh "docker push ${DOCKER_REPOSITORY_TAG}"
                // 删除生成的image
                //sh "docker rmi ${DOCKER_IMG_HOST}/${DOCKER_IMG_PATH}:${GIT_TAG}"
                // 删除jenkins生成的image
                sh '''
                    docker images | grep seaurl | awk '{print $3}' | xargs docker rmi -f
                '''
            }
        }
        stage("Deploy") {
            agent {
                docker {
                    image 'lwolf/helm-kubectl-docker'
                }
            }
            steps {
                echo "5.发布镜像"
                sh "mkdir -p ~/.kube"
                sh "echo ${K8S_CONFIG} | base64 -d  > ~/.kube/config"
                sh "sed -i 's#<imagename>#${DOCKER_REPOSITORY_TAG}#g;s#<podname>#${POD_NAME}#g' ${K8S_YAML}"
                sh "kubectl apply -f ${K8S_YAML} -n xxx"
            }
        }
    }
}

Answer 2

把镜像推送到docker镜像仓库，然后k8s运行pod的时候直接从镜像仓库拉镜像。

可以弄一个私有的镜像仓库，专门用来存放打包好的镜像。