Jenkins + Kubernetes CI/CD

1. 安装Kubernetes集群
2. 开通容器镜像服务，创建镜像仓库，如ycdocker/demo
3. 在集群外的ECS上安装Jenkins

4. 在Jenkins所在ECS安装kubectl，用以访问Kubernetes集群

   wget https://dl.k8s.io/v1.10.6/kubernetes-client-linux-amd64.tar.gztar -xvf kubernetes-client-linux-amd64.tar.gzcd kubernetes/client/binchmod +x ./kubectlsudo mv ./kubectl /usr/local/bin/kubectlmkdir /root/.kubevi /root/.kube/config

5. 安装Docker

   # step 1: 安装必要的一些系统工具sudo apt-get updatesudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common# step 2: 安装GPG证书curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -# Step 3: 写入软件源信息sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"# Step 4: 更新并安装 Docker-CEsudo apt-get -y updatesudo apt-get -y install docker-ce

6. 安装maven apt-get install maven -y

7. 选择Spring Boot Demo项目，Dockerfile放根目录

   FROM openjdk:8-jdk-alpineVOLUME /tmpARG JAR_FILECOPY ${JAR_FILE} app.jarENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

8. 上传代码到Git
9. 登陆Jenkins，创建free style项目
10. 配置Jenkins从Git取代码
11. 添加构建步骤，Shell脚本如下

mvn clean packagedocker build --build-arg JAR_FILE=target/gs-spring-boot-docker-0.1.0.jar -t registry.cn-beijing.aliyuncs.com/ycdocker/demo:$BUILD_NUMBER .docker login --username=***** --password=***** registry.cn-beijing.aliyuncs.comdocker push registry.cn-beijing.aliyuncs.com/ycdocker/demo:$BUILD_NUMBERkubectl set image deployment/demo demo=registry.cn-beijing.aliyuncs.com/ycdocker/demo:$BUILD_NUMBER

1. 修改代码测试效果