基于k8s的DEVOPS Part5 ---- 执行Jenkis pipeline

配置 Harbor 授权

导航至Manage Jenkins --  manage credentials

添加凭据

 添加 Harbor凭据

 

 

配置Gitlab 授权

添加Gitlab 凭据

配置 Kubernetes群集授权

导航至 manage jenkins -- managed file

 添加一个新的授权文件

 内容填写Master节点的 ~/.kube/config 内容

编写Pipeline脚本

由于只部署了一个Jenkins deployment实例 所有的流水线作业交给它来执行的话 势必会很忙 所以我们这次采用每次需要部署新流水线作业的时候 自动生成一新的jenkins 所有的流水线作业均在新部署的Jenkins实例上运行 流水线运行完毕后 该实例自动被销毁（该Jenkins实例镜像的Dockerfile如下）

FROM centos:7
LABEL maintainer karry

RUN yum install -y java-1.8.0-openjdk maven curl git libtool-ltdl-devel &&  
    yum clean all && 
    rm -rf /var/cache/yum/* && 
    mkdir -p /usr/share/jenkins

COPY slave.jar /usr/share/jenkins/slave.jar  
COPY jenkins-slave /usr/bin/jenkins-slave
COPY settings.xml /etc/maven/settings.xml
RUN  chmod +x /usr/bin/jenkins-slave
COPY kubectl /usr/bin/
chmod 777 /usr/bin/kubectl

ENTRYPOINT ["jenkins-slave"]

Pipeline 语句

前提：

k8s群集里面应有 dev default ops 命名空间

harbor中创建项目 并且在Libary项目中拥有tomcat:v1的镜像

gitlab 目录里面应用deploy.yaml文件

// 公共
def registry = "k8s-harbor.cds.local"
// 项目
def project = "dev"
def app_name = "java-demo"
def image_name = "${registry}/${project}/${app_name}:${BUILD_NUMBER}"
def git_address = "http://172.16.0.11:9999/root/java-demo.git"
// 认证
def secret_name = "registry-pull-secret"
def docker_registry_auth = "260ff818-175d-45c2-8250-c3b08163f8df"
def git_auth = "76ea2dd1-deb3-4e70-b8c0-e11867ccd1b8"
def k8s_auth = "b7d9a1fc-4fa2-4b6c-b98a-14f2272cf0e1"

pipeline {
  agent {
    kubernetes {
        label "jenkins-slave"
        yaml """
kind: Pod
metadata:
  name: jenkins-slave
spec:
  containers:
  - name: jnlp
    image: "${registry}/library/jenkins-slave-jdk:1.8"
    imagePullPolicy: Always
    volumeMounts:
      - name: docker-cmd
        mountPath: /usr/bin/docker
      - name: docker-sock
        mountPath: /var/run/docker.sock
      - name: maven-cache
        mountPath: /root/.m2
  volumes:
    - name: docker-cmd
      hostPath:
        path: /usr/bin/docker
    - name: docker-sock
      hostPath:
        path: /var/run/docker.sock
    - name: maven-cache
      hostPath:
        path: /tmp/m2
"""
        }
      
      }
    parameters {    
        gitParameter branch: '', branchFilter: '.*', defaultValue: 'master', description: '选择发布的分支', name: 'Branch', quickFilterEnabled: false, selectedValue: 'NONE', sortMode: 'NONE', tagFilter: '*', type: 'PT_BRANCH'
        choice (choices: ['1', '3', '5', '7'], description: '副本数', name: 'ReplicaCount')
        choice (choices: ['dev','default','ops'], description: '命名空间', name: 'Namespace')
    }
    stages {
        stage('拉取代码'){
            steps {
                checkout([$class: 'GitSCM', 
                branches: [[name: "${params.Branch}"]], 
                doGenerateSubmoduleConfigurations: false, 
                extensions: [], submoduleCfg: [], 
                userRemoteConfigs: [[credentialsId: "${git_auth}", url: "${git_address}"]]
                ])
            }
        }

        stage('代码编译'){
           steps {
             sh """
                mvn clean package -Dmaven.test.skip=true
                """ 
           }
        }

        stage('构建镜像'){
           steps {
                withCredentials([usernamePassword(credentialsId: "${docker_registry_auth}", passwordVariable: 'password', usernameVariable: 'username')]) {
                sh """
                  echo '
                    FROM ${registry}/library/tomcat:v1
                    LABEL maitainer karry
                    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 ${image_name}
                """
                }
           } 
        }
        stage('部署到K8S平台'){
          steps {
              configFileProvider([configFile(fileId: "${k8s_auth}", targetLocation: "admin.kubeconfig")]){
                sh """
                  sed -i 's#IMAGE_NAME#${image_name}#' deploy.yaml
                  sed -i 's#SECRET_NAME#${secret_name}#' deploy.yaml
                  sed -i 's#REPLICAS#${ReplicaCount}#' deploy.yaml            
                  chmod 777 /usr/bin/kubectl
                  kubectl apply -f deploy.yaml -n ${Namespace} --kubeconfig=admin.kubeconfig
                """
              }
          }
        }
    }
}

　　执行

执行中

 打开日志控制台查看输出

 成功执行

 登录harbor查看dev项目下多出一以流水线编号的tag的Tomcat镜像

namespace下创建出了pod实例

 查看 service

[root@k8s-master03 cna-ls]# kubectl get svc -n dev
NAME              TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
redis-server      ClusterIP      10.99.41.150     <none>        6379/TCP       3m1s
yelb-appserver    ClusterIP      10.108.152.58    <none>        4567/TCP       3m1s
yelb-db           ClusterIP      10.103.18.40     <none>        5432/TCP       3m1s
yelb-lb-service   LoadBalancer   10.111.75.93     <pending>     80:31369/TCP   3m1s
yelb-ui           ClusterIP      10.104.141.129   <none>        80/TCP         3m1s

　通过 NodePort访问也是没有问题