gistfile1.txt

version: "3"
services:
  db:
    image: "postgres"
    container_name: "postgres_db"
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres
      - POSTGRES_DB=db
    ports:
      - "54320:5432"
    volumes:
      - ./postgres-data:/var/lib/postgresql/data
      
-------------------------------------------

apiVersion: v1
kind: Pod
metadata:
  name: postgres
spec:
  containers:
    - name: container-postgres
      image: postgres
      ports:
        - containerPort: 5432
      env:
        - name: POSTGRES_USER
          value: "postgres"
        - name: POSTGRES_PASSWORD
          value: "postgres"
        - name: POSTGRES_DB
          value: "db"

-----------------------------------

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: stateful-postgres
spec:
  serviceName: "db"
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: container-postgres
          image: postgres
          ports:
            - containerPort: 5432
          env:
            - name: POSTGRES_USER
              value: "postgres"
            - name: POSTGRES_PASSWORD
              value: "postgres"
            - name: POSTGRES_DB
              value: "db"
          volumeMounts:
            - name: volume-postgres
              mountPath: /var/lib/postgresql/data
      volumes:
        - name: volume-postgres
          persistentVolumeClaim:
            claimName: config-postgres
            
---------------------------------------------------

apiVersion: v1
kind: Service
metadata:
  name: db
spec:
  ports:
    - port: 5432
      name: postgres
  clusterIP: None
  selector:
    app: postgres
    
---------------------------------------------------

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: config-postgres
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi