COG-GTM · devin-ai-integration · Oct 16, 2025
diff --git a/docker-compose.yml b/docker-compose.yml
@@ -1,17 +1,17 @@
 version: "3.8"
 services:
-  mysql:
-    image: mysql:latest
-    container_name: mysql
+  postgres:
+    image: postgres:15
+    container_name: postgres
     environment:
-      - MYSQL_ROOT_PASSWORD=Test@123
-      - MYSQL_DATABASE=BankDB
+      - POSTGRES_PASSWORD=Test@123
+      - POSTGRES_DB=BankDB
     volumes:
-      - bankapp-volume:/var/lib/mysql
+      - bankapp-volume:/var/lib/postgresql/data
     networks:
       - bankapp
     healthcheck:
-      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 10s
       timeout: 5s
       retries: 3
@@ -21,13 +21,13 @@ services:
     image: ${DUSER}/${IMAGE}
     container_name: Bankapp
     environment:
-      - SPRING_DATASOURCE_USERNAME=root
-      - SPRING_DATASOURCE_URL=jdbc:mysql://mysql:3306/BankDB?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
+      - SPRING_DATASOURCE_USERNAME=postgres
+      - SPRING_DATASOURCE_URL=jdbc:postgresql://postgres:5432/BankDB
       - SPRING_DATASOURCE_PASSWORD=Test@123
     ports:
       - "8080:8080"
     depends_on:
-      mysql:
+      postgres:
         condition: service_healthy
     networks:
       - bankapp
@@ -43,4 +43,4 @@ networks:
   bankapp:
 
 volumes:
-    bankapp-volume:
+    bankapp-volume:
diff --git a/helm/bankapp/templates/configMap.yml b/helm/bankapp/templates/configMap.yml
@@ -4,7 +4,7 @@ metadata:
   name: {{ .Values.configmap.name }} 
   namespace: {{ default "bankapp-namespace" .Values.namespace }}
 data:
-  MYSQL_DATABASE: {{ .Values.configmap.data.MYSQL_DATABASE }} 
-  SPRING_DATASOURCE_URL: jdbc:mysql://{{ .Values.db_statefulset.name }}-0.{{ .Values.db_statefulset.name }}-headless.{{ default "bankapp-namespace" .Values.namespace }}.svc.cluster.local:3306/{{ .Values.configmap.data.MYSQL_DATABASE }}?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
-  SPRING_DATASOURCE_USERNAME: {{ .Values.configmap.data.SPRING_DATASOURCE_USERNAME }} 
+  POSTGRES_DB: {{ .Values.configmap.data.POSTGRES_DB }} 
+  SPRING_DATASOURCE_URL: jdbc:postgresql://{{ .Values.db_statefulset.name }}-0.{{ .Values.db_statefulset.name }}-headless.{{ default "bankapp-namespace" .Values.namespace }}.svc.cluster.local:5432/{{ .Values.configmap.data.POSTGRES_DB }}
+  SPRING_DATASOURCE_USERNAME: {{ .Values.configmap.data.SPRING_DATASOURCE_USERNAME }}   
 
diff --git a/helm/bankapp/templates/deployment.yml b/helm/bankapp/templates/deployment.yml
@@ -18,7 +18,7 @@ spec:
       initContainers:
       - name: "wait-for-{{ .Values.db_statefulset.name }}"
         image: busybox:1.28
-        command: ['sh', '-c', 'until nc -z {{ .Values.db_statefulset.name }}-0.{{ .Values.db_statefulset.name }}-headless 3306; do echo waiting for mysql; sleep 5; done;']
+        command: ['sh', '-c', 'until nc -z {{ .Values.db_statefulset.name }}-0.{{ .Values.db_statefulset.name }}-headless 5432; do echo waiting for postgres; sleep 5; done;']
       containers:
       - name: {{ .Values.app_deployment.name }}
         image: {{ .Values.image.app }}
@@ -38,7 +38,7 @@ spec:
         - name: SPRING_DATASOURCE_PASSWORD        
           valueFrom:
             secretKeyRef:
-              name: mysql-secret  
+              name: postgres-secret  
               key: SPRING_DATASOURCE_PASSWORD      
         livenessProbe:
           httpGet:

diff --git a/helm/bankapp/templates/mysqlService.yml b/helm/bankapp/templates/mysqlService.yml
@@ -11,5 +11,5 @@ spec:
     app: {{ .Values.db_statefulset.name }}
   ports:
   - protocol: TCP
-    port: {{ default "3306" .Values.mysql_svc.port}}
-    targetPort: {{ default "3306" .Values.mysql_svc.targetPort}}
+    port: {{ default "5432" .Values.postgres_svc.port}}
+    targetPort: {{ default "5432" .Values.postgres_svc.targetPort}}
diff --git a/helm/bankapp/templates/mysqlStatefulSet.yml b/helm/bankapp/templates/mysqlStatefulSet.yml
@@ -20,37 +20,35 @@ spec:
       - name: {{ .Values.db_statefulset.name }}
         image: {{ .Values.image.db }}
         ports:
-        - containerPort: 3306
+        - containerPort: 5432
         env:
-        - name: MYSQL_ROOT_PASSWORD
+        - name: POSTGRES_PASSWORD
           valueFrom:
-            secretKeyRef:                      ### CRITICAL
-              name: mysql-secret                  ### CRITICAL
-              key: MYSQL_ROOT_PASSWORD    ### CRITICAL
-        - name: MYSQL_DATABASE
+            secretKeyRef:
+              name: postgres-secret
+              key: POSTGRES_PASSWORD
+        - name: POSTGRES_DB
           valueFrom:
             configMapKeyRef:
               name: {{ .Values.configmap.name }} 
-              key: MYSQL_DATABASE 
+              key: POSTGRES_DB 
         volumeMounts:
         - name: "{{ .Values.db_statefulset.name }}-data"
-          mountPath: /var/lib/mysql
+          mountPath: /var/lib/postgresql/data
         livenessProbe:
           exec:
             command:
-            - mysqladmin
-            - ping
-            - -h
-            - localhost
+            - pg_isready
+            - -U
+            - postgres
           initialDelaySeconds: 30
           periodSeconds: 10
         readinessProbe:
           exec:
             command:
-            - mysqladmin
-            - ping
-            - -h
-            - localhost
+            - pg_isready
+            - -U
+            - postgres
           initialDelaySeconds: 10
           periodSeconds: 5
   volumeClaimTemplates:

diff --git a/helm/bankapp/templates/persistentVolume.yml b/helm/bankapp/templates/persistentVolume.yml
@@ -13,4 +13,4 @@ spec:
   persistentVolumeReclaimPolicy: Retain
   storageClassName: manual
   hostPath:
-    path: "/tmp/bankapp-mysql" # This will be stored on the host machine running KIND
+    path: "/tmp/bankapp-postgres"
diff --git a/helm/bankapp/templates/secrets.yml b/helm/bankapp/templates/secrets.yml
@@ -5,5 +5,5 @@ metadata:
   namespace: {{ default "bankapp-namespace" .Values.namespace }}
 type: Opaque
 data:
-  MYSQL_ROOT_PASSWORD: {{ .Values.secret.data.MYSQL_ROOT_PASSWORD | b64enc | quote }}
+  POSTGRES_PASSWORD: {{ .Values.secret.data.POSTGRES_PASSWORD | b64enc | quote }}
   SPRING_DATASOURCE_PASSWORD: {{ .Values.secret.data.SPRING_DATASOURCE_PASSWORD | b64enc | quote }}
diff --git a/helm/bankapp/values.yaml b/helm/bankapp/values.yaml
@@ -5,12 +5,12 @@ namespace: bankapp-namespace
 configmap:  
   name: bankapp-config
   data:
-      MYSQL_DATABASE: BankDB
-      SPRING_DATASOURCE_USERNAME: root
+      POSTGRES_DB: BankDB
+      SPRING_DATASOURCE_USERNAME: postgres
 
 ## name, label and storage size for database 
 db_statefulset:
-  name: mysql
+  name: postgres
   storage: 5Gi
 
 ## name and label of app deployment
@@ -24,7 +24,7 @@ app_deployment:
 ## image repository and tag of app and db.
 image:
   app: trainwithshubham/springboot-bankapp:latest
-  db: mysql:latest
+  db: postgres:15
 
 # NodePort svc for bankapp
 bankapp_svc:
@@ -34,9 +34,9 @@ bankapp_svc:
 
 
 # headless svc configuration for db
-mysql_svc:
-    port: 3306
-    targetPort: 3306
+postgres_svc:
+    port: 5432
+    targetPort: 5432
 
 # HPA minimun and maximum pods and average cpu utilization
 hpa:
@@ -47,8 +47,8 @@ hpa:
 # Secret for Database connectivity
 
 secret:
-  name: mysql-secret
+  name: postgres-secret
   data: 
-    MYSQL_ROOT_PASSWORD: Test@123       # (Base64 encoded 'Test@123')
-    SPRING_DATASOURCE_PASSWORD: Test@123       # (Base64 encoded 'Test@123')
+    POSTGRES_PASSWORD: Test@123
+    SPRING_DATASOURCE_PASSWORD: Test@123
 
diff --git a/kubernetes/bankapp-deployment.yml b/kubernetes/bankapp-deployment.yml
@@ -31,15 +31,15 @@ spec:
             configMapKeyRef:
               name: bankapp-config
               key: SPRING_DATASOURCE_USERNAME
-        - name: MYSQL_DATABASE
+        - name: POSTGRES_DB
           valueFrom:
             configMapKeyRef:
               name: bankapp-config
-              key: MYSQL_DATABASE
+              key: POSTGRES_DB
         - name: SPRING_DATASOURCE_PASSWORD
           valueFrom:
             secretKeyRef:
-              name: mysql-secret
+              name: postgres-secret
               key: SPRING_DATASOURCE_PASSWORD
         # readinessProbe:
         #   httpGet:

diff --git a/kubernetes/configmap.yaml b/kubernetes/configmap.yaml
@@ -4,6 +4,6 @@ metadata:
   name: bankapp-config
   namespace: bankapp-namespace
 data:
-  MYSQL_DATABASE: BankDB
-  SPRING_DATASOURCE_URL: jdbc:mysql://mysql-svc.bankapp-namespace.svc.cluster.local:3306/BankDB?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
-  SPRING_DATASOURCE_USERNAME: root
+  POSTGRES_DB: BankDB
+  SPRING_DATASOURCE_URL: jdbc:postgresql://postgres-svc.bankapp-namespace.svc.cluster.local:5432/BankDB
+  SPRING_DATASOURCE_USERNAME: postgres
diff --git a/kubernetes/mysql-deployment.yml b/kubernetes/mysql-deployment.yml
@@ -1,42 +1,42 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: mysql
+  name: postgres
   namespace: bankapp-namespace
   labels:
-    app: mysql
+    app: postgres
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: mysql
+      app: postgres
   template:
     metadata:
       labels:
-        app: mysql
+        app: postgres
     spec:
       containers:
-      - name: mysql
-        image: mysql:8.0  # Use a specific, stable version for production
+      - name: postgres
+        image: postgres:15
         ports:
-        - containerPort: 3306
+        - containerPort: 5432
         env:
-        - name: MYSQL_ROOT_PASSWORD
+        - name: POSTGRES_PASSWORD
           valueFrom:
             secretKeyRef:
-              name: mysql-secret
-              key: MYSQL_ROOT_PASSWORD
-        - name: MYSQL_DATABASE
+              name: postgres-secret
+              key: POSTGRES_PASSWORD
+        - name: POSTGRES_DB
           valueFrom:
             configMapKeyRef:
               name: bankapp-config
-              key: MYSQL_DATABASE
+              key: POSTGRES_DB
         volumeMounts:
-        - name: mysql-pv-storage
-          mountPath: /var/lib/mysql
-          subPath: mysql-data  # Optional: Ensure a subdirectory is used for better volume organization
+        - name: postgres-pv-storage
+          mountPath: /var/lib/postgresql/data
+          subPath: postgres-data
       volumes:
-      - name: mysql-pv-storage
+      - name: postgres-pv-storage
         persistentVolumeClaim:
-          claimName: mysql-pvc
+          claimName: postgres-pvc
 
diff --git a/kubernetes/mysql-service.yaml b/kubernetes/mysql-service.yaml
@@ -1,14 +1,14 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: mysql-svc
+  name: postgres-svc
   namespace: bankapp-namespace
   labels:
-    app: mysql
+    app: postgres
 spec:
   selector:
-    app: mysql
+    app: postgres
   ports:
   - protocol: TCP
-    port: 3306
-    targetPort: 3306
+    port: 5432
+    targetPort: 5432
diff --git a/kubernetes/persistent-volume-claim.yaml b/kubernetes/persistent-volume-claim.yaml
@@ -1,7 +1,7 @@
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
-  name: mysql-pvc
+  name: postgres-pvc
   namespace: bankapp-namespace
 spec:
   accessModes:

diff --git a/kubernetes/persistent-volume.yaml b/kubernetes/persistent-volume.yaml
@@ -1,16 +1,16 @@
 apiVersion: v1
 kind: PersistentVolume
 metadata:
-  name: mysql-pv
+  name: postgres-pv
   namespace: bankapp-namespace
 spec:
   capacity:
     storage: 10Gi
   volumeMode: Filesystem
   accessModes:
     - ReadWriteOnce
-  persistentVolumeReclaimPolicy: Retain  # Keeps the PV after the PVC is deleted
-  storageClassName: standard  # Make sure this matches your cluster's default storage class
+  persistentVolumeReclaimPolicy: Retain
+  storageClassName: standard
   hostPath:
-    path: /mnt/data/mysql
+    path: /mnt/data/postgres
     type: DirectoryOrCreate
diff --git a/kubernetes/secrets.yaml b/kubernetes/secrets.yaml
@@ -1,10 +1,10 @@
 apiVersion: v1
 kind: Secret
 metadata:
-  name: mysql-secret
+  name: postgres-secret
   namespace: bankapp-namespace
 type: Opaque
 data:
-  MYSQL_ROOT_PASSWORD: VGVzdEAxMjM=  # Base64 for "Test@123"
+  POSTGRES_PASSWORD: VGVzdEAxMjM=  # Base64 for "Test@123"
   SPRING_DATASOURCE_PASSWORD: VGVzdEAxMjM= # Base64 for "Test@123"
 
diff --git a/pom.xml b/pom.xml
@@ -51,12 +51,11 @@
 			<artifactId>thymeleaf-extras-springsecurity6</artifactId>
 		</dependency>
 
-		<dependency>
-			<groupId>mysql</groupId>
-			<artifactId>mysql-connector-java</artifactId>
-			<version>8.0.33</version>
-			<scope>runtime</scope>
-		</dependency>
+	<dependency>
+		<groupId>org.postgresql</groupId>
+		<artifactId>postgresql</artifactId>
+		<scope>runtime</scope>
+	</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
@@ -1,11 +1,11 @@
 spring.application.name=bankapp
-# MySQL Database configuration
-spring.datasource.url=jdbc:mysql://localhost:3306/bankappdb?useSSL=false&serverTimezone=UTC
-spring.datasource.username=root
+# PostgreSQL Database configuration
+spring.datasource.url=jdbc:postgresql://localhost:5432/bankappdb
+spring.datasource.username=postgres
 spring.datasource.password=Test@123
-spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.driver-class-name=org.postgresql.Driver
 
 # JPA & Hibernate configuration
 spring.jpa.hibernate.ddl-auto=update
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 spring.jpa.show-sql=true