Fix doc for Jenkins on Kubernetes

README.md

@@ -1,3 +1,5 @@
 # Kubernetes Manifests for Jenkins Deployment
 
-Refer https://devopscube.com/setup-jenkins-on-kubernetes-cluster/ for step by step process to use these manifests.
+Refer to https://devopscube.com/setup-jenkins-on-kubernetes-cluster/ for step-by-step process to use these manifests.
+
+A variant is maintained as https://www.jenkins.io/doc/book/installing/kubernetes/ instructions.

jenkins-00-namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: devops-tools

jenkins-01-serviceAccount.yaml

@@ -0,0 +1,30 @@
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: jenkins-admin
+rules:
+  - apiGroups: [""]
+    resources: ["*"]
+    verbs: ["*"]
+
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: jenkins-admin
+  namespace: devops-tools
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: jenkins-admin
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: jenkins-admin
+subjects:
+- kind: ServiceAccount
+  name: jenkins-admin
+  namespace: devops-tools

jenkins-02-volume.yaml

@@ -0,0 +1,47 @@
+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: local-storage
+provisioner: kubernetes.io/no-provisioner
+volumeBindingMode: WaitForFirstConsumer
+
+---
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: jenkins-pv-volume
+  labels:
+    type: local
+spec:
+  storageClassName: local-storage
+  claimRef:
+    name: jenkins-pv-claim
+    namespace: devops-tools
+  capacity:
+    storage: 10Gi
+  accessModes:
+    - ReadWriteOnce
+  local:
+    path: /mnt
+  nodeAffinity:
+    required:
+      nodeSelectorTerms:
+      - matchExpressions:
+        - key: kubernetes.io/hostname
+          operator: In
+          values:
+          - worker-node01
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: jenkins-pv-claim
+  namespace: devops-tools
+spec:
+  storageClassName: local-storage
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 3Gi

jenkins-03-deployment.yaml

@@ -0,0 +1,59 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: jenkins
+  namespace: devops-tools
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: jenkins-server
+  template:
+    metadata:
+      labels:
+        app: jenkins-server
+    spec:
+      securityContext:
+            fsGroup: 1000 
+            runAsUser: 1000
+      serviceAccountName: jenkins-admin
+      containers:
+        - name: jenkins
+          image: jenkins/jenkins:lts
+          # OPTIONAL: check for new floating-tag LTS releases whenever the pod is restarted:
+          imagePullPolicy: Always
+          resources:
+            limits:
+              memory: "2Gi"
+              cpu: "1000m"
+            requests:
+              memory: "500Mi"
+              cpu: "500m"
+          ports:
+            - name: httpport
+              containerPort: 8080
+            - name: jnlpport
+              containerPort: 50000
+          livenessProbe:
+            httpGet:
+              path: "/login"
+              port: 8080
+            initialDelaySeconds: 90
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 5
+          readinessProbe:
+            httpGet:
+              path: "/login"
+              port: 8080
+            initialDelaySeconds: 60
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 3
+          volumeMounts:
+            - name: jenkins-data
+              mountPath: /var/jenkins_home         
+      volumes:
+        - name: jenkins-data
+          persistentVolumeClaim:
+              claimName: jenkins-pv-claim

jenkins-04-service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: jenkins-service
+  namespace: devops-tools
+  annotations:
+      prometheus.io/scrape: 'true'
+      prometheus.io/path:   /
+      prometheus.io/port:   '8080'
+spec:
+  selector: 
+    app: jenkins-server
+  type: NodePort  
+  ports:
+    - port: 8080
+      targetPort: 8080
+      nodePort: 32000