Update .gitlab-ci.yml, manifest/grafana.yml

.gitlab-ci.yml

+deploy:
+   image:
+     name: bitnami/kubectl:latest
+     entrypoint: [""]
+   script:
+   - pwd
+   - kubectl config use-context devops-usecase/iot-usecase-k8-demo:newagent
+   - kubectl config view
+   - kubectl get nodes
+   - kubectl get ns
+   
+   - kubectl apply -f manifest/grafana.yml
+

manifest/grafana.yml

+---
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: grafana-pv
+spec:
+  capacity:
+    storage: 3Gi
+  volumeMode: Filesystem 
+  accessModes:
+  - ReadWriteOnce
+  persistentVolumeReclaimPolicy: Recycle
+  storageClassName: local-storage
+  local:
+    path: /home/centos/data/grafana
+  nodeAffinity:
+    required:
+      nodeSelectorTerms:
+      - matchExpressions:
+        - key: kubernetes.io/hostname 
+          operator: In
+          values:
+          - node1
+
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: grafana-pvc
+  labels:
+    app: grafana
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+  storageClassName: local-storage 
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: grafana
+  name: grafana
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: grafana
+  template:
+    metadata:
+      labels:
+        app: grafana
+    spec:
+      securityContext:
+        fsGroup: 472
+        supplementalGroups:
+          - 0
+      containers:
+        - name: grafana
+          image: grafana/grafana:8.4.4
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 3000
+              name: http-grafana
+              protocol: TCP
+          readinessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /robots.txt
+              port: 3000
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 30
+            successThreshold: 1
+            timeoutSeconds: 2
+          livenessProbe:
+            failureThreshold: 3
+            initialDelaySeconds: 30
+            periodSeconds: 10
+            successThreshold: 1
+            tcpSocket:
+              port: 3000
+            timeoutSeconds: 1
+          resources:
+            requests:
+              cpu: 250m
+              memory: 750Mi
+          volumeMounts:
+            - mountPath: /var/lib/grafana
+              name: grafana-pv
+      volumes:
+        - name: grafana-pv
+          persistentVolumeClaim:
+            claimName: grafana-pvc
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: grafana
+spec:
+  ports:
+    - port: 3000
+      protocol: TCP
+      targetPort: http-grafana
+  selector:
+    app: grafana
+  sessionAffinity: None
+  type: LoadBalancer
+