jenkins学习笔记之二十一：k8s部署jenkins及动态slave

apiVersion: apps/v1
kind: Deployment
metadata:
  name: jenkins
  namespace: kube-ops
spec:
  replicas: 1
  selector:
    matchLabels:
      app: jenkins
  template:
    metadata:
      labels:
        app: jenkins
    spec:
      serviceAccount: jenkins
      containers:
      - name: jenkins
        image: jenkins/jenkins:lts     
        ports:
        - containerPort: 8080
          name: web
          protocol: TCP
        - containerPort: 50000
          name: agent
          protocol: TCP
        resources:
          limits:
            cpu: 1000m
            memory: 1Gi
          requests:
            cpu: 500m
            memory: 512Mi
        livenessProbe:
          httpGet:
            path: /login
            port: 8080
          initialDelaySeconds: 120
          timeoutSeconds: 5
          failureThreshold: 12
        readinessProbe:
          httpGet:
            path: /login
            port: 8080
        volumeMounts:
        - name: jenkinshome
          subPath: jenkins
          mountPath: /var/jenkins_home
      securityContext:
        fsGroup: 1000
      nodeSelector:  
        kubernetes.io/hostname: k8s-node01  #因为测试环境没有分布式存储，所以需要指定节点
      volumes:
      - name: jenkinshome   #使用的本地挂载，生产使用误用
        hostPath:
          path: /data
          type: Directory

apiVersion: v1
kind: Service
metadata:
  name: jenkins
  namespace: kube-ops
  labels:
    app: jenkins
spec:
  selector:
    app: jenkins
  type: NodePort
  ports:
  - name: web
    port: 8080
    targetPort: web
    nodePort: 30002
  - name: agent
    port: 50000
    targetPort: agent

apiVersion: v1
kind: ServiceAccount
metadata:
  name: jenkins
  namespace: kube-ops
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: jenkins
rules:
  - apiGroups: ["extensions", "apps"]
    resources: ["deployments"]
    verbs: ["create", "delete", "get", "list", "watch", "patch", "update"]
  - apiGroups: [""]
    resources: ["services"]
    verbs: ["create", "delete", "get", "list", "watch", "patch", "update"]
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["create","delete","get","list","patch","update","watch"]
  - apiGroups: [""]
    resources: ["pods/exec"]
    verbs: ["create","delete","get","list","patch","update","watch"]
  - apiGroups: [""]
    resources: ["pods/log"]
    verbs: ["get","list","watch"]
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: jenkins
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: jenkins
subjects:
  - kind: ServiceAccount
    name: jenkins
    namespace: kube-ops

# 再绑定的节点上操作，当前配置是k8s-node01
mkdir /data
chown -R 1000:1000 /data
kubectl create namespace kube-ops #所有资源创建在kube-ops名称空间中,所以有需要先创建kube-ops名称空间
kubectl create -f jenkin-rbac.yaml  #创建 rbac 相关的资源对象
kubectl create -f jenkins-deploy.yaml #创建 Jenkins 服务
kubectl create -f jenkins-svc.yaml
kubectl get pods -n kube-ops #确认生成的pod正常运行,通过任意节点的 IP:30002 端口就可以访问 jenkins 服务
kubectl get pods -n kube-ops
kubectl logs -n kube-ops jenkins-5c44df4686-jjl9f  #
kubectl exec -it -n kube-ops jenkins-5c44df4686-jjl9f -- /bin/bash
cat /var/jenkins_home/secrets/initialAdminPassword

pipeline{
    agent{
        kubernetes{
            label "test01"   
            cloud 'kubernetes'  #此处需要注意值为cloud kubernetes的名称，不是固定写法
            yaml '''
---
kind: Pod
apiVersion: v1
metadata:
  labels:
    k8s-app: jenkinsagent
  name: jenkinsagent
  namespace: kube-ops
spec:
containers:
  - name: jenkinsagent
    image: jenkins/jnlp-slave:4.13.3-1-jdk11
    imagePullPolicy: IfNotPresent
    resources:
      limits:
        cpu: 1000m
        memory: 2Gi
      requests:
        cpu: 500m
        memory: 512Mi
'''
        }
    }
    stages{
        stage("test"){
          steps{
            script{
              sh "java -version & sleep 30"
            }
          }
        }
    }
}