基于kubernetes+docker+jenkins的DevOps实践之前自己的项目开发就搭了个cicd的环境，那时候是在本就小的可怜的服务器上搭了一套 jenkins + docker registry + docker 见之前的笔记 docker学习下面 总的差不多这样: 之后对kubernetes的接触后，就在之前的基础上加入kubernetes,其实也就是在服务器拉取镜像docker run的时候改变为通知kubernetes的apiServer对提前配置好的项目配置文件xx.yaml进行更新kubectl appply -f xx.yaml，它会对配置里的镜像拉取在多个pod里运行，当然还需要对应的service，如果需要暴露给外部还可以添个ingress。 一个小服务器加本地一个闲置从机撑进去这么多东西很显然爆了，于是把jenkins , docker registry拆出来，用上了公共的ali云服务CodePipeline,容器镜像服务。 这里记录一下。docker搭建ubuntu安装docker官方教程kubernetes搭建之前写的kubernetes学习下面有使用ali云CodePipeline替代jenkins创建任务配置->项目名称：最好为github上代码的demo项目名称,这里以bootshiro为例配置->源码管理->Git：URL为github上的项目clone url,下面默认master分支配置->构建触发器->填写代码分支：eg:master 点击生成触发器地址留下备用(github webhook配置会用到)配置->构建项目类型可选maven项目 node python等(按自己需求改编译打包册测试脚本)eg: maven项目 编译打包: mvn package -B -DskipTests 用例测试: mvn test配置->镜像构建和发布: 这里使用ali云的免费docker镜像仓库镜像版本号最好用jenkins环境变量标记,registry地址证书等就是自己开通的ali云registry地址和账户,docker路径是相对于当前代码仓库的Dcokerfile文件路径,用这个Dockefile文件来生成镜像。eg: bootshiro的Dockefile#VERSION 1.1.0#基础镜像为openjdk:12-alpineFROM openjdk:12-alpine#签名MAINTAINER tomsun28 “tomsun28@outlook.com"RUN rm -rf /opt/running/bootshiro*ADD ./target/bootshiro.jar /opt/running/bootshiro.jarEXPOSE 8080WORKDIR /opt/running/CMD [“java”, “-jar”, “bootshiro.jar”,”–spring.profiles.active=prod"]配置->部署Kubernetes(新): 这里配置对搭建好的k8s环境的apiServer连接,之后好使用apiServer对kubernetes操作认证方式：选择认证证书API服务器地址：为apiServer通讯地址证书：使用docker授权模式,客户端Key(key.pem)和客户端证书(cert.pem)在/etc/kubernetes/admin.conf,服务端CA证书(ca.pem)在/etc/kubernetes/pki/ca.crt部署配置文件：为k8s部署这个项目的配置文件位置，也是以当前项目代码仓库为相对路径,eg :bootshiro.yaml# ———————-bootshiro——————— ## ——bootshiro deployment—— #kind: DeploymentapiVersion: apps/v1beta2metadata: name: bootshiro-deployment labels: app: bootshirospec: replicas: 1 selector: matchLabels: app: bootshiro template: metadata: labels: app: bootshiro spec: containers: - name: nginx image: registry.cn-hangzhou.aliyuncs.com/tomsun28/bootshiro:${BUILD_NUMBER} ports: - containerPort: 8080—# ——-nginx-service——— #apiVersion: v1kind: Servicemetadata: name: bootshiro-servicespec:# type: NodePort ports: - name: server port: 8080 targetPort: 8080 selector: app: bootshiro# !———————-bootshiro——————— #这里配置部署文件创建了一个pod实例，创建了与其想对应的service在集群内部暴露服务。如果部署的应用需要对集群外提供服务，这里还要创建对应的暴露服务的方式，如ingress, nodeport等-到此cicd就差不多了，我们开发代码push到github仓库上，跟着DevOps流程走，最后项目就会自己运行到kubernetes集群里面了，pod挂了或者从机挂了，k8s会重新启保证设定数量的pod。使用ingress对集群外暴露服务这里使用的是traefik-ingress,在kubernetes中部署traefik有官方部署手册，基本按着走一遍就能部署上去了。 整合部署的traefik.yaml:—kind: ClusterRoleapiVersion: rbac.authorization.k8s.io/v1beta1metadata: name: traefik-ingress-controllerrules: - apiGroups: - "" resources: - services - endpoints - secrets verbs: - get - list - watch - apiGroups: - extensions resources: - ingresses verbs: - get - list - watch—kind: ClusterRoleBindingapiVersion: rbac.authorization.k8s.io/v1beta1metadata: name: traefik-ingress-controllerroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: traefik-ingress-controllersubjects:- kind: ServiceAccount name: traefik-ingress-controller namespace: kube-system—apiVersion: v1kind: ServiceAccountmetadata: name: traefik-ingress-controller namespace: kube-system—kind: DaemonSetapiVersion: extensions/v1beta1metadata: name: traefik-ingress-controller namespace: kube-system labels: k8s-app: traefik-ingress-lbspec: template: metadata: labels: k8s-app: traefik-ingress-lb name: traefik-ingress-lb spec: serviceAccountName: traefik-ingress-controller terminationGracePeriodSeconds: 60 containers: - image: traefik name: traefik-ingress-lb ports: - name: http containerPort: 80 hostPort: 80 - name: admin containerPort: 8080 securityContext: capabilities: drop: - ALL add: - NET_BIND_SERVICE args: - –api - –kubernetes - –logLevel=INFO—apiVersion: v1kind: Servicemetadata: name: traefik-web-ui namespace: kube-systemspec: selector: k8s-app: traefik-ingress-lb ports: - name: web port: 80 targetPort: 8080—apiVersion: extensions/v1beta1kind: Ingressmetadata: name: traefik-web-ui namespace: kube-system annotations: kubernetes.io/ingress.class: traefik traefik.frontend.rule.type: PathPrefixStripspec: rules: - host: tom.usthe.com http: paths: - path: /ingress backend: serviceName: traefik-web-ui servicePort: web使用traefik来暴露service:apiVersion: extensions/v1beta1kind: Ingressmetadata: name: chess namespace: default annotations: kubernetes.io/ingress.class: traefik traefik.frontend.rule.type: PathPrefixStripspec: rules: - host: tom.usthe.com http: paths: - path: /usthe backend: serviceName: usthe-service servicePort: http - path: /nginx backend: serviceName: nginx servicePort: http转载请注明 from tomsun28