描述背景：

注：kubernetes基本环境搭建完成，存储rook-ceph，rbd方式。代码仓库gitlab,容器仓库harbor,监控prometheus，负载方式都用了内部clusterip然后 traefik代理的方式。为了完善工具链，容器中搭建jenkins工具。

集群配置：初始集群环境kubeadm 1.16.1

ip	自定义域名	主机名
192.168.3.8	master.k8s.io	k8s-vip
192.168.3.10	master01.k8s.io	k8s-master-01
192.168.3.5	master02.k8s.io	k8s-master-02
192.168.3.12	master03.k8s.io	k8s-master-03
192.168.3.6	node01.k8s.io	k8s-node-01
192.168.3.2	node02.k8s.io	k8s-node-02
192.168.3.4	node03.k8s.io	k8s-node-03

安装jenkins

建立命名空间
kubectl create namespace kube-ops
注：后续所有工具类应用程序都创建在此命名空间内。
创建ServiceAccount & ClusterRoleBinding

注：都是用的默认的，权限的管理还没有深入进行学习下。

cat <<EOF > rabc.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: jenkins2
  namespace: kube-ops
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: jenkins2
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/v1beta1
kind: ClusterRoleBinding
metadata:
  name: jenkins2
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: jenkins2
subjects:
  - kind: ServiceAccount
    name: jenkins2
    namespace: kube-ops
EOF
kubectl apply -f rabc.yaml

3.deployment jenkins

cat <<EOF > jenkins.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: opspvc
  labels:
    app: jenkins2
  namespace: kube-ops
spec:
  storageClassName: rook-ceph-block
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: jenkins2
  namespace: kube-ops
spec:
  selector:
    matchLabels:
      app: jenkins2
  template:
    metadata:
      labels:
        app: jenkins2
    spec:
      terminationGracePeriodSeconds: 10
      serviceAccountName: jenkins2
      containers:
      - name: jenkins
        image: jenkins/jenkins:lts
        imagePullPolicy: IfNotPresent
        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: 60
          timeoutSeconds: 5
          failureThreshold: 12
        readinessProbe:
          httpGet:
            path: /login
            port: 8080
          initialDelaySeconds: 60
          timeoutSeconds: 5
          failureThreshold: 12
        volumeMounts:
        - name: jenkinshome
          subPath: jenkins2
          mountPath: /var/jenkins_home
        env:
        - name: LIMITS_MEMORY
          valueFrom:
            resourceFieldRef:
              resource: limits.memory
              divisor: 1Mi
        - name: JAVA_OPTS
          value: -Xmx$(LIMITS_MEMORY)m -XshowSettings:vm -Dhudson.slaves.NodeProvisioner.initialDelay=0 -Dhudson.slaves.NodeProvisioner.MARGIN=50 -Dhudson.slaves.NodeProvisioner.MARGIN0=0.85 -Duser.timezone=Asia/Shanghai
      securityContext:
        fsGroup: 1000
      volumes:
      - name: jenkinshome
        persistentVolumeClaim:
          claimName: opspvc

---
apiVersion: v1
kind: Service
metadata:
  name: jenkins2
  namespace: kube-ops
  labels:
    app: jenkins2
spec:
  selector:
    app: jenkins2
  ports:
  - name: web
    port: 8080
    targetPort: web
  - name: agent
    port: 50000
    targetPort: agent
EOF
kubectl apply -f jenkins.yaml
注： kubernetes 1.16 取消了extensions/v1beta1 api，使用apps/v1。

4.traefik对外暴露服务
cat <<EOF > ingress.yaml
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  namespace: kube-ops
  name: jenkins2-https
spec:
  entryPoints:
    - websecure
  tls:
    secretName: all-saynaihe-com
  routes:
    - match: Host(\`jenkins.sainaihe.com\`)
      kind: Rule
      services:
        - name: jenkins2
          port: 8080
EOF
kubectl apply -f ingress.yaml
登陆jenkins。初始化配置
访问 https://jenkins.saynaihe.com,出现：获取初始密码
kubectl exec -it jenkins2-9f55b98b6-xtffb cat /var/jenkins_home/secrets/initialAdminPassword -n kube-ops
设置管理员账号密码，进入登陆界面

安装插件，安装了中文插件，pipeline，gitlab,git,github 参数化插件等，看个人需要安装吧。注：因为国外源不稳定国内有其他备用源可以切换比如清华的源。jenkins中文社区有篇文章：https://mp.weixin.qq.com/s/rqx93WI0UEvzqaFrt84i8A可以参考。

k8s-install-jenkins

描述背景：

安装jenkins

登陆jenkins。初始化配置

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