k8s -安装jenkins

jenkins is the leading open source automation server, Jenkins provides hundreds of plugins to support building, deploying and automating any project.

安装

使用helm安装

helm repo add jenkinsci https://charts.jenkins.io/
helm install my-jenkins jenkinsci/jenkins --version 3.8.9

Update Complete. ⎈Happy Helming!⎈
[root@cvicse ~]# helm install my-jenkins jenkinsci/jenkins --version 3.8.9
NAME: my-jenkins
LAST DEPLOYED: Sat Nov 27 11:30:06 2021
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get your 'admin' user password by running:
  kubectl exec --namespace default -it svc/my-jenkins -c jenkins -- /bin/cat /run/secrets/chart-admin-password && echo
2. Get the Jenkins URL to visit by running these commands in the same shell:
  echo http://127.0.0.1:8080
  kubectl --namespace default port-forward svc/my-jenkins 8080:8080

3. Login with the password from step 1 and the username: admin
4. Configure security realm and authorization strategy
5. Use Jenkins Configuration as Code by specifying configScripts in your values.yaml file, see documentation: http:///configuration-as-code and examples: https://github.com/jenkinsci/configuration-as-code-plugin/tree/master/demos

For more information on running Jenkins on Kubernetes, visit:
https://cloud.google.com/solutions/jenkins-on-container-engine

For more information about Jenkins Configuration as Code, visit:
https://jenkins.io/projects/jcasc/


NOTE: Consider using a custom image with pre-installed plugins

使用配置文件安装

编写配置文件

vim jenkins-deploy.yaml
###############使用 storageClass 创建 pvc ###################
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins-data-pvc
  namespace: default
spec:
  accessModes:
    - ReadWriteMany
  # 指定 storageClass 的名字，这里使用 minikube 默认的 standard
  storageClassName: "local"
  resources:
    requests:
      storage: 10Gi

###############创建一个ServiceAccount 名称为：jenkins-admin###################
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: jenkins-admin
  namespace: default
  labels:
    name: jenkins

###############绑定账户jenkins-admin 为集群管理员角色，为了控制权限建议绑定自定义角色###################
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: jenkins-admin
  labels:
    name: jenkins
subjects:
  - kind: ServiceAccount
    name: jenkins-admin
    namespace: default
roleRef:
  kind: ClusterRole
  # cluster-admin 是 k8s 集群中默认的管理员角色
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io


############### 在 default 命名空间创建 deployment ###################
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: jenkins
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: jenkins
  template:
    metadata:
      labels:
        app: jenkins
    spec:
      terminationGracePeriodSeconds: 10
      # 注意：k8s 1.21.x 中 serviceAccount 改名为 serviceAccountName
      # 这里填写上面创建的 serviceAccount 的 name
      serviceAccount: jenkins-admin
      containers:
        - name: jenkins
          image: jenkins/jenkins:lts-jdk11
          imagePullPolicy: IfNotPresent
          env:
            - name: JAVA_OPTS
              value: -Duser.timezone=Asia/Shanghai
          ports:
            - containerPort: 8080
              name: web
              protocol: TCP
            - containerPort: 50000
              name: agent
              protocol: TCP
          resources:
            limits:
              # cpu: 50m
              memory: 1Gi
            requests:
              # cpu: 100m
              memory: 512Mi
          livenessProbe:
            httpGet:
              path: /login
              port: 8080
            initialDelaySeconds: 60
            timeoutSeconds: 5
            failureThreshold: 12
          readinessProbe:
            httpGet:
              path: /login
              port: 8080
            initialDelaySeconds: 60
            timeoutSeconds: 5
            failureThreshold: 12
          volumeMounts:
            - name: jenkinshome
              mountPath: /var/jenkins_home
      volumes:
        - name: jenkinshome
          persistentVolumeClaim:
            claimName: jenkins-data-pvc

############### 在 default 命名空间创建 service ###################
---
apiVersion: v1
kind: Service
metadata:
  name: jenkins
  namespace: default
  labels:
    app: jenkins
spec:
  selector:
    app: jenkins
  type: ClusterIP
  ports:
    - name: web
      port: 8080
      targetPort: 8080


---
apiVersion: v1
kind: Service
metadata:
  name: jenkins-agent
  namespace: default
  labels:
    app: jenkins
spec:
  selector:
    app: jenkins
  type: ClusterIP
  ports:
    - name: agent
      port: 50000
      targetPort: 50000

部署

kubectl apply -f jenkins-deploy.yaml

查看pod的状态

kubectl get pods 
kubectl describe pod jenkins-xxxxxxx #上面获得的pod名字
kubectl logs jenkins-xxxxxxx #上面获得的pod名字

使用jenkins过程中遇到的问题：

用安装在 Docker 中的 jenkins 运行 Docker 任务