added conf files for k8s

cluster1/statefulset-db2.yaml

@@ -0,0 +1,71 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: db2
+  namespace: cluster1
+spec:
+  serviceName: db2
+  replicas: 1
+  selector:
+    matchLabels:
+      app: db2
+  template:
+    metadata:
+      labels:
+        app: db2
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:15-alpine
+          ports:
+            - containerPort: 5432
+          env:
+            - name: POSTGRES_DB
+              valueFrom:
+                secretKeyRef:
+                  name: cluster1-postgres-secret
+                  key: DB2_NAME
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: cluster1-postgres-secret
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: cluster1-postgres-secret
+                  key: POSTGRES_PASSWORD
+            - name: PGDATA
+              value: /var/lib/postgresql/data/pgdata
+          volumeMounts:
+            - name: db2-data
+              mountPath: /var/lib/postgresql/data
+            - name: init-scripts
+              mountPath: /docker-entrypoint-initdb.d/01-init.sql
+              subPath: db2-init.sql
+            - name: init-scripts
+              mountPath: /docker-entrypoint-initdb.d/02-data.sql
+              subPath: db2-data.sql
+      volumes:
+        - name: db2-data
+          persistentVolumeClaim:
+            claimName: db2-data
+        - name: init-scripts
+          configMap:
+            name: cluster1-init-scripts
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: db2
+  namespace: cluster1
+spec:
+  type: ClusterIP
+  selector:
+    app: db2
+  ports:
+    - name: postgres
+      port: 5432
+      targetPort: 5432
+
+