apiVersion: v1
kind: PersistentVolume
metadata:
  name: postgres-pv
  namespace: notes-app
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: /data/notes-postgres
  persistentVolumeReclaimPolicy: Retain
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-pvc
  namespace: notes-app
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: db
  namespace: notes-app
spec:
  serviceName: db
  replicas: 1
  selector:
    matchLabels:
      app: db
  template:
    metadata:
      labels:
        app: db
    spec:
      containers:
        - name: postgres
          image: postgres:16-alpine
          env:
            - name: POSTGRES_DB
              value: appdb
            - name: POSTGRES_USER
              value: appuser
            - name: POSTGRES_PASSWORD
              value: apppassword
          ports:
            - containerPort: 5432
          volumeMounts:
            - name: postgres-storage
              mountPath: /var/lib/postgresql/data
            - name: init-sql
              mountPath: /docker-entrypoint-initdb.d
      volumes:
        - name: postgres-storage
          persistentVolumeClaim:
            claimName: postgres-pvc
        - name: init-sql
          configMap:
            name: db-init