added conf files for k8s

cluster1/statefulset-replica.yaml

@@ -0,0 +1,71 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: replica
+  namespace: cluster1
+spec:
+  serviceName: replica
+  replicas: 1
+  selector:
+    matchLabels:
+      app: replica
+  template:
+    metadata:
+      labels:
+        app: replica
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:15-alpine
+          ports:
+            - containerPort: 5432
+          env:
+            - name: POSTGRES_DB
+              value: replica_db
+            - 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
+          command:
+            - /bin/sh
+            - -c
+            - |
+              chmod +x /replication-scripts/entrypoint-replica.sh
+              exec /replication-scripts/entrypoint-replica.sh
+          volumeMounts:
+            - name: replica-data
+              mountPath: /var/lib/postgresql/data
+            - name: replication-scripts
+              mountPath: /replication-scripts
+      volumes:
+        - name: replica-data
+          persistentVolumeClaim:
+            claimName: replica-data
+        - name: replication-scripts
+          configMap:
+            name: cluster1-replication-scripts
+            defaultMode: 0755
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: replica
+  namespace: cluster1
+spec:
+  type: ClusterIP
+  selector:
+    app: replica
+  ports:
+    - name: postgres
+      port: 5432
+      targetPort: 5432
+
+