jenkins脚本式流水线部署k8s项目实例一

一、代码文件

main.go

代码语言：javascript复制

package main

// Import the fmt for formatting strings
// Import os so we can read environment variables from the system
import (
	"fmt"
	"os"
)

func main() {
	fmt.Println("Hello, Kubernetes！I'm from Jenkins CI！")
	fmt.Println("BRANCH_NAME:", os.Getenv("branch"))
}

二、构建镜像的Dockerfile文件

代码语言：javascript复制

FROM golang:1.8.0-alpine

ADD . /go/src/app

WORKDIR /go/src/app

RUN GOOS=linux GOARCH=386 go build -v -o /go/src/app/jenkins-app

CMD ["./jenkins-app"]

三、k8s部署服务k8s.yaml文件

代码语言：javascript复制

apiVersion: apps/v1
kind: Deployment
metadata:
  name: jenkins-demo
  namespace: default
spec:
  selector:
    matchLabels:
      app: jenkins-demo
  template:
    metadata:
      labels:
        app: jenkins-demo
    spec:
      containers:
      - image: cnych/jenkins-demo:<BUILD_TAG>
        imagePullPolicy: IfNotPresent
        name: jenkins-demo
        env:
        - name: branch
          value: <BRANCH_NAME>

四、Jenkinsfile流水线文件

代码语言：javascript复制

node('haimaxy-jnlp') {
    stage('Prepare') {
        echo "1.Prepare Stage"
        checkout scm
        script {
            build_tag = sh(returnStdout: true, script: 'git rev-parse --short HEAD').trim()
            if (env.BRANCH_NAME != 'master') {
                build_tag = "${env.BRANCH_NAME}-${build_tag}"
            }
        }
    }
    stage('Test') {
      echo "2.Test Stage"
    }
    stage('Build') {
        echo "3.Build Docker Image Stage"
        sh "docker build -t cnych/jenkins-demo:${build_tag} ."
    }
    stage('Push') {
        echo "4.Push Docker Image Stage"
        withCredentials([usernamePassword(credentialsId: 'dockerHub', passwordVariable: 'dockerHubPassword', usernameVariable: 'dockerHubUser')]) {
            sh "docker login -u ${dockerHubUser} -p ${dockerHubPassword}"
            sh "docker push cnych/jenkins-demo:${build_tag}"
        }
    }
    stage('Deploy') {
        echo "5. Deploy Stage"
        if (env.BRANCH_NAME == 'master') {
            input "确认要部署线上环境吗？"
        }
        sh "sed -i 's/<BUILD_TAG>/${build_tag}/' k8s.yaml"
        sh "sed -i 's/<BRANCH_NAME>/${env.BRANCH_NAME}/' k8s.yaml"
        sh "kubectl apply -f k8s.yaml --record"
    }
}

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jenkins 部署 服务 脚本 镜像

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