# PostgreSQL — PersistentVolumeClaim + Deployment + Service
# Credentials match the env file: user=vaishnavi  pass=admin  db=vaishnavi_db
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-data
  namespace: ecommerce
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  # If your cluster has no default StorageClass, add: storageClassName: "local-path"
  # For k3s clusters this is already set to local-path by default.
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres
  namespace: ecommerce
  labels:
    app: postgres
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres:15-alpine
          ports:
            - containerPort: 5432
          env:
            - name: POSTGRES_DB
              value: "vaishnavi_db"
            - name: POSTGRES_USER
              value: "vaishnavi"
            - name: POSTGRES_PASSWORD
              value: "admin"
            - name: PGDATA
              value: "/var/lib/postgresql/data/pgdata"
          volumeMounts:
            - name: postgres-data
              mountPath: /var/lib/postgresql/data
          resources:
            requests:
              cpu: "100m"
              memory: "256Mi"
            limits:
              cpu: "500m"
              memory: "512Mi"
          readinessProbe:
            exec:
              command: ["pg_isready", "-U", "vaishnavi", "-d", "vaishnavi_db"]
            initialDelaySeconds: 10
            periodSeconds: 5
            failureThreshold: 6
          livenessProbe:
            exec:
              command: ["pg_isready", "-U", "vaishnavi", "-d", "vaishnavi_db"]
            initialDelaySeconds: 30
            periodSeconds: 10
      volumes:
        - name: postgres-data
          persistentVolumeClaim:
            claimName: postgres-data
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
  namespace: ecommerce
spec:
  type: ClusterIP
  selector:
    app: postgres
  ports:
    - port: 5432
      targetPort: 5432