apiVersion: v1
kind: PersistentVolume
metadata:
  name: pg-pv
  namespace: webapp
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data/pgdata"

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pg-pvc
  namespace: webapp
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
  namespace: webapp
spec:
  selector:
    matchLabels:
      app: postgres
  serviceName: "postgres"
  replicas: 1
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
      - name: postgres
        image: postgres:15
        env:
        - name: POSTGRES_DB
          value: mydb
        - name: POSTGRES_USER
          value: user
        - name: POSTGRES_PASSWORD
          value: password
        ports:
        - containerPort: 5432
        volumeMounts:
        - name: pg-storage
          mountPath: /var/lib/postgresql/data
  volumeClaimTemplates:
  - metadata:
      name: pg-storage
    spec:
      accessModes: ["ReadWriteOnce"]
      resources:
        requests:
          storage: 1Gi