create postgres db manifest for k8s deployment

Author: akhil27051999

k8s/database.yaml

@@ -0,0 +1,104 @@
+
+# Namespace for database
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: student-api
+---
+# ConfigMap for database host, port, and DB name
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: postgres-config
+  namespace: student-api
+data:
+  POSTGRES_HOST: postgres
+  POSTGRES_PORT: "5432"
+  POSTGRES_DB: studentdb
+---
+# PersistentVolumeClaim for Postgres storage
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc
+  namespace: student-api
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+---
+# Deployment for Postgres
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgres
+  namespace: student-api
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      nodeSelector:
+        type: database
+      containers:
+        - name: postgres
+          image: postgres:15
+          ports:
+            - containerPort: 5432
+          env:
+            # Secrets for username & password
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-secret
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-secret
+                  key: POSTGRES_PASSWORD
+            # ConfigMap for DB name, host, port
+            - name: POSTGRES_DB
+              valueFrom:
+                configMapKeyRef:
+                  name: postgres-config
+                  key: POSTGRES_DB
+            - name: POSTGRES_HOST
+              valueFrom:
+                configMapKeyRef:
+                  name: postgres-config
+                  key: POSTGRES_HOST
+            - name: POSTGRES_PORT
+              valueFrom:
+                configMapKeyRef:
+                  name: postgres-config
+                  key: POSTGRES_PORT
+          volumeMounts:
+            - name: postgres-storage
+              mountPath: /var/lib/postgresql/data
+      volumes:
+        - name: postgres-storage
+          persistentVolumeClaim:
+            claimName: postgres-pvc
+---
+# Service to expose Postgres
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: student-api
+spec:
+  selector:
+    app: postgres
+  ports:
+    - protocol: TCP
+      port: 5432
+      targetPort: 5432
+  type: ClusterIP