apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
  labels:
    app: postgres
    env: live
spec:
  selector:
    matchLabels:
      app: postgres
      env: live
  serviceName: postgres-service
  replicas: 1
  template:
    metadata:
      labels:
        app: postgres
        env: live
    spec:
      containers:
      - name: postgres
        image: postgres
        volumeMounts:
        - name: postgres-disk
          mountPath: /var/lib/postgresql/data
        env:
        - name: POSTGRES_PASSWORD
          value: pg2020
        - name: PGDATA
          value: /var/lib/postgresql/data/pgdata
      volumes:
      - name: postgres-disk
        persistentVolumeClaim:
          claimName: postgres
#  volumeClaimTemplates:
#  - metadata:
#      name: postgres-disk
#    spec:
#      accessModes:
#      - ReadWriteOnce
#      resources:
#        requests:
#          storage: 10Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres
  labels:
    app: postgres
spec:
  storageClassName: nfs-ssd
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 20Mi
# service.yml
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
  labels:
    app: postgres
    env: live
spec:
  selector:
    env: live
  type: LoadBalancer
  ports:
  - port: 5432
    targetPort: 5432