# 1. PersistentVolume — cluster-scoped, hostPath on minikube node
apiVersion: v1
kind: PersistentVolume
metadata:
  name: db-pv
  labels:
    app: db
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: manual
  hostPath:
    path: /mnt/data/taskapp-db
    type: DirectoryOrCreate

---
# 2. PersistentVolumeClaim — namespaced, binds to db-pv
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: db-pvc
  namespace: taskapp
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: manual
  resources:
    requests:
      storage: 1Gi
  selector:
    matchLabels:
      app: db

---
# 3. StatefulSet — Postgres
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: db
  namespace: taskapp
spec:
  serviceName: db                # references the headless Service in service.yaml
  replicas: 1
  selector:
    matchLabels:
      app: db
  template:
    metadata:
      labels:
        app: db
    spec:
      containers:
        - name: postgres
          image: postgres:15
          ports:
            - containerPort: 5432
              name: postgres
          envFrom:
            - secretRef:
                name: db-credentials
          env:
            - name: PGDATA
              value: /var/lib/postgresql/data/pgdata
          volumeMounts:
            - name: db-storage
              mountPath: /var/lib/postgresql/data
          resources:
            requests:
              cpu: 100m
              memory: 128Mi
            limits:
              cpu: 500m
              memory: 512Mi
          readinessProbe:
            exec:
              command:
                - sh
                - -c
                - 'pg_isready -U "$POSTGRES_USER"'
            initialDelaySeconds: 5
            periodSeconds: 5
            timeoutSeconds: 3
          livenessProbe:
            exec:
              command:
                - sh
                - -c
                - 'pg_isready -U "$POSTGRES_USER"'
            initialDelaySeconds: 10
            periodSeconds: 10
            timeoutSeconds: 3
      volumes:
        - name: db-storage
          persistentVolumeClaim:
            claimName: db-pvc