grafana.yaml

# https://grafana.com/docs/grafana/latest/installation/kubernetes/
---
# PV가 있어야함!
# https://kubernetes.io/docs/concepts/storage/persistent-volumes/
apiVersion: v1
kind: PersistentVolume
metadata:
  name: grafana-pv
spec:
  storageClassName: grafana
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  capacity:
    storage:  2Gi
  # Retain : PVC가 삭제 되어도 데이터는 남음
  persistentVolumeReclaimPolicy: Retain
  hostPath:
    path: /opt/grafana
    type : DirectoryOrCreate
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: grafana-pvc
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: grafana
  resources:
    requests:
      storage: 1Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: grafana
  name: grafana
spec:
  selector:
    matchLabels:
      app: grafana
  template:
    metadata:
      labels:
        app: grafana
    spec:
      securityContext:
      # https://grafana.com/docs/grafana/latest/installation/docker/#migrate-to-v51-or-later
        fsGroup: 472
        supplementalGroups:
          - 0
      initContainers:
        - name: grafana-data-permission-fix
          image: busybox
          command: ["/bin/chmod", "-R", "777", "/data"]
          volumeMounts:
            - name: grafana-pv
              mountPath: /data
      containers:
        - name: grafana
          image: grafana/grafana:latest
          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:
            # 요구사항
            requests:
              cpu: "250m"
              memory: "750Mi"
            # 제한사항
            limits:
              cpu: "500m"
              memory: "1.5Gi"
          volumeMounts:
            - mountPath: /var/lib/grafana
              name: grafana-pv
      volumes:
        - name: grafana-pv
          persistentVolumeClaim:
            claimName: grafana-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: grafana
spec:
  type: NodePort
  selector:
    app: grafana
  ports:
    - port: 3000
      protocol: TCP
      targetPort: http-grafana
  sessionAffinity: None