apiVersion: v1 
kind: PersistentVolumeClaim 
metadata: 
  name: mariadb-data 
spec: 
  accessModes: 
    - ReadWriteOnce 
  storageClassName: nfs-client 
  resources: 
    requests: 
      storage: 500Mi 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mariadb
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mariadb
  template:
    metadata:
      labels:
        app: mariadb
    spec:
      containers:
        - name: mariadb
          image: mariadb:10.2
          ports:
            - name: mariadb
              containerPort: 3306
              protocol: TCP
          readinessProbe:
            tcpSocket:
              port: 3306
            initialDelaySeconds: 5
            periodSeconds: 10
            timeoutSeconds: 5
            successThreshold: 1
            failureThreshold: 3
          volumeMounts:
            - name: mariadb-data
              mountPath: /var/lib/mysql
              readOnly: true
          envFrom:
            - secretRef:
                name: mariadb-secrets
      volumes:
        - name: mariadb-data
          persistentVolumeClaim:
            claimName: mariadb-data
---
apiVersion: v1
kind: Service
metadata:
  name: mariadb
spec:
  type: ClusterIP
  selector:
    app: mariadb
  ports:
    - name: mariadb
      port: 3306
      targetPort: 3306
      protocol: TCP