apiVersion: v1
kind: Service
metadata:
  name: postgres
  namespace: default
  labels:
    app: postgres
spec:
  ports:
    - port: 5432
      name: postgres-port
  clusterIP: None
  selector:
    app: postgres
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
spec:
  replicas: 1
  serviceName: "postgres"
  selector:
    matchLabels:
      app: postgres
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres-container
          image: postgres
          ports:
            - name: postgres-port
              containerPort: 5432
          imagePullPolicy: Always
          envFrom:
            - secretRef:
                name: db-secrets
          resources:
            requests:
              memory: "300Mi"
              cpu: "500m"
            limits:
              memory: "1000Mi"
              cpu: "2000m"
          volumeMounts:
            - mountPath: /var/lib/postgresql/data
              name: postgres-data
  volumeClaimTemplates:
    - metadata:
        name: postgres-data
      spec:
        accessModes: [ "ReadWriteOnce" ]
        resources:
          requests:
            storage: 10Gi