feat: Add secret db k8s

.k8s/REAMDE.md

@@ -18,7 +18,8 @@ Getting started
 3. Create secret
 
 
-    kubectl create secret generic languages-secret --from-literal=GOOGLE_CLIENT_ID=password
+    kubectl create secret generic languages-secret --from-literal=GOOGLE_CLIENT_ID=password  --from-literal=POSTGRES_DATABASE=db --from-literal=POSTGRES_USER=user --from-literal=POSTGRES_PASSWORD=password
+
 
 4. Execute
 
@@ -105,6 +106,11 @@ Getting started
   kubectl create secret generic languages-secret --from-literal=GOOGLE_CLIENT_ID=password
   ```
 
+- **Delete secret**:
+  ```bash
+  kubectl delete secret languages-secret
+  ```
+
 - **Display secret value**:
   ```
   kubectl get secret languages-secret -n default -o jsonpath="{.data.GOOGLE_CLIENT_ID}" | base64 --decode

.k8s/db-deployment.yaml

@@ -23,11 +23,20 @@ spec:
             - name: PGDATA
               value: /var/lib/postgresql/data/pgdata
             - name: POSTGRES_DB
-              value: languages
+              valueFrom:
+                secretKeyRef:
+                  name: languages-secret
+                  key: POSTGRES_DATABASE
             - name: POSTGRES_PASSWORD
-              value: app123456
+              valueFrom:
+                secretKeyRef:
+                  name: languages-secret
+                  key: POSTGRES_PASSWORD
             - name: POSTGRES_USER
-              value: postgres
+              valueFrom:
+                secretKeyRef:
+                  name: languages-secret
+                  key: POSTGRES_USER
           image: postgres
           name: db
           ports:
@@ -40,6 +49,9 @@ spec:
               name: db-claim0
       restartPolicy: Always
       volumes:
+        - name: secret-volume
+          secret:
+            secretName: languages-secret
         - name: db-claim0
           persistentVolumeClaim:
             claimName: db-claim0