feat(k8s): PV, PVC, StatefulSet for postgres

statefulset.yaml

@@ -0,0 +1,98 @@
+# 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