apiVersion: v1
kind: Service
metadata:
  name: grafana
  labels:
    k8s-app: grafana
spec:
  type: NodePort
  ports:
  - name: http
    port: 3000
    targetPort: 3000
    nodePort: 30300
  selector:
    k8s-app: grafana
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: grafana
  labels:
    k8s-app: grafana
spec:
  selector:
    matchLabels:
      k8s-app: grafana
  template:
    metadata:
      labels:
        k8s-app: grafana
    spec:
      initContainers:          
      - name: init-file
        image: busybox:1.28
        imagePullPolicy: IfNotPresent
        securityContext:
          runAsUser: 0
        command: ['chown', '-R', "472:0", "/var/lib/grafana"]
        volumeMounts:
        - name: data
          mountPath: /var/lib/grafana
          subPath: grafana
      containers:                
      - name: grafana     
        image: grafana/grafana:7.4.3
        securityContext:        
          fsGroup: 0
          runAsUser: 472
        ports:
        - name: http
          containerPort: 3000
        env:                   
        - name: GF_SECURITY_ADMIN_USER
          value: "admin"
        - name: GF_SECURITY_ADMIN_PASSWORD
          value: "admin"
        resources:
          limits:
            cpu: '2'
            memory: 1Gi
          requests:
            cpu: 1
            memory: 512Mi
        readinessProbe:          
          failureThreshold: 10
          httpGet:
            path: /api/health
            port: 3000
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 30
        livenessProbe:           
          failureThreshold: 10
          httpGet:
            path: /api/health
            port: 3000
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        volumeMounts:          
        - name: data
          mountPath: /var/lib/grafana
          subPath: grafana
      volumes:                 
      - name: data
        persistentVolumeClaim:
          claimName: grafana