YML file postgres example

apiVersion: v1
kind: Service
metadata:
  name: postgres
spec:
  ports:
  - name: postgres
    port: 5432
    targetPort: 5432
    protocol: TCP
  selector:
    app: postgres

---
apiVersion: v1
kind: ReplicationController
metadata:
  name: postgres
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres
          resources:
            limits:
              memory: 512Mi
            requests:
              memory: 256Mi
          env:
            - name: POSTGRES_USER
              value: user
            - name: POSTGRES_PASSWORD
              value: password
            - name: POSTGRES_DB
              value: database
            - name: PGDATA
              value: /var/lib/postgresql/data/pgdata
          ports:
            - containerPort: 5432
          volumeMounts:
            - mountPath: /var/lib/postgresql/data
              name: pg-data
            - mountPath: /tmp
              name: backup
      volumes:
        - name: pg-data
          hostPath:
            path: /home/postgres
        - name: backup
          hostPath:
            path: /home/core/backup