本篇内容主要讲解“k8s的部署脚本是什么”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“k8s的部署脚本是什么”吧!
浅谈docker
docker可以类比为jvm,jvm也是虚拟机,然后docker的image可以类比为jar包,jar运行在jvm里面,image当然运行在docker容器里,然后jar包是通过maven 的pom.xml定义构建的产物,那docker也有一个Dockerfile来定义打包的镜像。在没有容器化之前,我们开发提供的最终产物是jar,容器化之后我们需要提供docker的镜像,docker的镜像会包含我们的jar,然后提供一个稳定的可移植的运行环境。下面是最简单的一个docker镜像构建:
通过 docker build -t kl/sales . 就可以构建一个可运行的镜像
浅谈k8s的部署脚本
其实k8s的脚本没什么可说的,本身k8s的概念非常之多,具体可参考官方的文档,下面贴出我们的部署文件
apiVersion: extensions/v1beta1kind: Deploymentmetadata: name: sales-app namespace: #namespacespec: replicas: 2 minReadySeconds: 130 # 从容器启动到应用正常提供服务 strategy: # k8s更新策略 type: RollingUpdate #滚动更新 rollingUpdate: maxSurge: 2 # 更新时允许最大激增的容器数,默认 replicas 的 1/4 向上取整 maxUnavailable: 1 # 更新时允许最大 unavailable 容器数,默认 replicas 的 1/4 向下取整 template: metadata: labels: app: sales-app spec: imagePullSecrets: #镜像拉取秘钥 - name: xx-xx-xx containers: - name: sales image: xxx-vpc.cn-xx.aliyuncs.com/keking/sales:#Tag imagePullPolicy: Always env: - name: runShell value: #runShell ports: - containerPort: 6002 name: web protocol: TCP resources: limits: cpu: 600m memory: 4Gi requests: cpu: 300m memory: 100Mi livenessProbe: #检查是否存活 httpGet: path: /health port: 6002 initialDelaySeconds: 240 #首次检查在多少时间后 periodSeconds: 180 #检查周期 timeoutSeconds: 3 #超时时间 failureThreshold: 3 #失败的阈值,连续三次 readinessProbe: #检查是否成功启动 httpGet: path: /health port: 6002 initialDelaySeconds: 140 #首次检查在多少时间后 periodSeconds: 300 #检查周期 timeoutSeconds: 3 #超时时间---apiVersion: v1kind: Servicemetadata: name: sales-app namespace: #namespace labels: app: sales-appspec: selector: app: sales-app ports: - name: web port: 80 targetPort: 6002 nodePort: 31942 type: NodePort
最后聊聊jenkins pipeline
和一般的jenkins pipeline定义一样,容器化后就多了两个步骤,一个是在jar生成后,根据前面的讲的Dockerfile文件构建docker的镜像,这个要求jenkins所在主机必须有docker的环境。第二个步骤是发送k8s的部署脚本到k8s容器,这个是通过jenkins kuberneetes插件来完成的,详见下面的jenkins脚本
podTemplate(label: 'jnlp-slave', cloud: 'kubernetes', containers: [ containerTemplate( name: 'jnlp', image: 'xx-vpc.cn-xx.aliyuncs.com/keking/jenkins-slave:latest', alwaysPullImage: true ),], volumes: [ hostPathVolume(mountPath: '/var/run/docker.sock', hostPath: '/var/run/docker.sock'), hostPathVolume(mountPath: '/usr/bin/docker', hostPath: '/usr/bin/docker'), hostPathVolume(mountPath: '/usr/local/jdk', hostPath: '/usr/local/jdk'), hostPathVolume(mountPath: '/usr/local/maven', hostPath: '/usr/local/maven'), ], imagePullSecrets: ['registry-pull-secret'],) { node("jnlp-slave") { stage('Git Checkout') { checkout([$class: 'GitSCM', branches: [[name: "*/${branch}"]], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: 'xx', url: 'http://xx.xx.xx/xx/yudian-salesplatform-boot.git']]]) } stage('Maven Build') { script { if ('true' == "${build}") { sh "mvn clean install -U -P${profile} -Dmaven.test.skip=true" } else { echo "跳过maven build" } } } stage('Docker Build ') { script { if ('true' == "${build}") { sh ''' docker login -u it_sh@keking-group -p x#xxx-vpc.cn-xx.aliyuncs.com docker build -t xx-vpc.cn-xx.aliyuncs.com/keking/sales:${Tag} . docker push xx-vpc.cn-xx.aliyuncs.com/keking/sales:${Tag} ''' } else { echo "跳过docker build" } } } stage('Deploy to K8s') { script { if('true' == "${deploy}"){ if ('prod' == "${profile}") { sh ''' sed -i "s/#namespace/prod/g" deploy.yaml sed -i "s%#runShell%java -Xmx2G -Xms2G -Xmn960M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp/dump.log -Xloggc:/tmp/gc.log -verbose:gc -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:MaxMetaspaceSize=128m -XX:MetaspaceSize=128m -jar -Ddev_meta=http://conf.x.ops:8801/ -Denv=DEV -Didc=prod app.jar%g" deploy.yaml ''' } if ('uat' == "${profile}") { sh ''' sed -i "s/#namespace/uat/g" deploy.yaml sed -i "s%#runShell%java -Xmx1536M -Xms1536M -Xmn960M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp/dump.log -Xloggc:/tmp/gc.log -verbose:gc -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:MaxMetaspaceSize=128m -XX:MetaspaceSize=128m -jar -Ddev_meta=http://conf.keking.ops:8801/ -Denv=DEV -Didc=sales_docker app.jar%g" deploy.yaml ''' } sh ''' sed -i "s/#Tag/${Tag}/g" deploy.yaml ''' kubernetesDeploy configs: 'deploy.yaml', kubeConfig: [path: ''], kubeconfigId: '9c1da035-60b9-4bd8-aeae-1a31666280ce', secretName: '', ssh: [sshCredentialsId: '*', sshServer: ''], textCredentials: [certificateAuthorityData: '', clientCertificateData: '', clientKeyData: '', serverUrl: 'https://'] }else { echo "跳过Deploy k8s" } } } } }
到此,相信大家对“k8s的部署脚本是什么”有了更深的了解,不妨来实际操作一番吧!这里是编程网网站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!