31, k8s 之 jenkins 部署到k8s 环境中自动部署成Pod

1,将Jenkins构建好的镜像，部署在k8s中，需要安装:
Kubernetes Continuous Deploy插件。


2,
[root@centos7 ~]# kubectl create secret docker-registry registry-pull-secret --docker-username=admin --docker-password=Harbor12345 --docker-email=[e-mail] --docker-server=192.168.0.12
secret/registry-pull-secret created
[root@centos7 ~]# 


3,
# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=./ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER}
# 设置客户端认证参数
kubectl config set-credentials admin \
  --client-certificate=./admin.pem \
  --embed-certs=true \
  --client-key=./admin-key.pem
# 设置上下文参数
kubectl config set-context kubernetes \
  --cluster=kubernetes \
  --user=admin
# 设置默认上下文
kubectl config use-context kubernetes

4,

// 公共
def registry = "192.168.0.12"
// 项目
def project = "welcome"
def app_name = "demo"
def image_name = "${registry}/${project}/${app_name}:${BUILD_NUMBER}"
def git_address = "git@192.168.0.12:/home/git/java-demo.git"
// 认证
def secret_name = "registry-pull-secret"
def docker_registry_auth = "34de57a6-c6a2-4910-997b-150749833513"
def git_auth = "b087ae08-04bc-4d3f-bda8-bf7cb85279e8"
def k8s_auth = "34ce7b04-7513-46c2-9419-ff0591ba0005"

podTemplate(label: 'jenkins-slave', cloud: 'kubernetes', containers: [
    containerTemplate(
        name: 'jnlp', 
        image: "${registry}/library/jenkins-slave-jdk:1.8"
    ),
  ],
  //挂载宿主机的docker及docker命令，挂载到容器中
  volumes: [
    hostPathVolume(mountPath: '/var/run/docker.sock', hostPath: '/var/run/docker.sock'),
    hostPathVolume(mountPath: '/usr/bin/docker', hostPath: '/usr/bin/docker')
  ],
) 
{
  node("jenkins-slave"){
      // 第一步
      stage('拉取代码'){
         checkout([$class: 'GitSCM', branches: [[name: '${Branch}']], userRemoteConfigs: [[credentialsId: "${git_auth}", url: "${git_address}"]]])
      }
      // 第二步
      stage('代码编译'){
          sh "mvn clean package -Dmaven.test.skip=true"
      }
      // 第三步
      stage('构建镜像'){
          withCredentials([usernamePassword(credentialsId: "${docker_registry_auth}", passwordVariable: 'password', usernameVariable: 'username')]) {
            sh """
              echo '
                FROM lizhenliang/tomcat 
                RUN rm -rf /usr/local/tomcat/webapps/*
                ADD target/*.war /usr/local/tomcat/webapps/ROOT.war 
              ' > Dockerfile
              docker build -t ${image_name} .
              docker login -u ${username} -p '${password}' ${registry}
              docker push ${image_name}
            """
            }
      }
	  // 第四步
      stage('部署到K8S平台'){
          sh """
          sed -i 's#\$IMAGE_NAME#${image_name}#' deploy.yml
          sed -i 's#\$SECRET_NAME#${secret_name}#' deploy.yml
          """
          kubernetesDeploy configs: 'deploy.yml', kubeconfigId: "${k8s_auth}"
      }
  }
}