apiVersion: apps/v1
kind: Deployment
metadata:
  name: grafana
  labels:
    app.kubernetes.io/name: grafana
spec:
  replicas: 1 # we can only have 1 replica for as long as the database is sqlite
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app.kubernetes.io/name: grafana
  template:
    metadata:
      labels:
        app.kubernetes.io/name: grafana
    spec:
      initContainers:
        - name: init-ownership
          image: bash:5
          command: ['chown', '-R', '472:472', '/var/lib/grafana']
          volumeMounts:
            - mountPath: /var/lib/grafana
              name: grafana-pv
      containers:
        - name: grafana
          image: grafana/grafana
          env:
            - name: GF_AUTH_ANONYMOUS_ENABLED
              value: "false"
            # - name: GF_DATABASE_TYPE
            #   value: postgres
            # - name: GF_DATABASE_HOST
            #   valueFrom:
            #     secretKeyRef:
            #       name: postgres-credentials
            #       key: host
            # - name: GF_DATABASE_NAME
            #   valueFrom:
            #     secretKeyRef:
            #       name: postgres-credentials
            #       key: database
            # - name: GF_DATABASE_USER
            #   valueFrom:
            #     secretKeyRef:
            #       name: postgres-credentials
            #       key: username
            # - name: GF_DATABASE_PASSWORD
            #   valueFrom:
            #     secretKeyRef:
            #       name: postgres-credentials
            #       key: password
          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
          ports:
            - name: http
              containerPort: 3000
          resources:
            requests:
              cpu: 250m
              memory: 500Mi
            limits:
              cpu: 500m
              memory: 750Mi
          volumeMounts:
            - name: grafana-datasources
              mountPath: /etc/grafana/provisioning/datasources
            - mountPath: /var/lib/grafana
              name: grafana-pv
      volumes:
        - name: grafana-datasources
          configMap:
            name: grafana-datasources
        - name: grafana-pv
          persistentVolumeClaim:
            claimName: grafana-pvc
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
---
apiVersion: v1
kind: Service
metadata:
  name: grafana
  labels:
    app.kubernetes.io/name: grafana
    monitor: prometheus
spec:
  selector:
    app.kubernetes.io/name: grafana
  ports:
    - name: http
      port: 3000
      targetPort: http