Consistent labeling for resources managed by the Application controller

Author: Archisman-Mridha

kubernetes/manifests/application-controller/deployment.yaml

@@ -17,7 +17,7 @@ spec:
       serviceAccountName: application-controller
       containers:
         - name: application-controller
-          image: ghcr.io/archisman-mridha/instagram-clone-application-controller:2420c7e7f17085462ddce5bfe7eeb37f1b308c4a
+          image: ghcr.io/archisman-mridha/instagram-clone-application-controller:0e132f1998e5208cc9c71ab60d2e70cc7d2940d3
           resources:
             requests:
               memory: 128Mi

kubernetes/manifests/microservices/feeds/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: feeds-microservice
   namespace: microservices
+  labels:
+    app: feeds-microservice
+    app.kubernetes.io/instance: feeds-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-feeds-microservice:07db74b3dd4888026a2e852c6fca860157aa910a

kubernetes/manifests/microservices/followships/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: followships-microservice
   namespace: microservices
+  labels:
+    app: followships-microservice
+    app.kubernetes.io/instance: followships-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-followships-microservice:07db74b3dd4888026a2e852c6fca860157aa910a

kubernetes/manifests/microservices/gateway/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: gateway-microservice
   namespace: microservices
+  labels:
+    app: gateway-microservice
+    app.kubernetes.io/instance: gateway-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-gateway:2420c7e7f17085462ddce5bfe7eeb37f1b308c4a

kubernetes/manifests/microservices/posts/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: posts-microservice
   namespace: microservices
+  labels:
+    app: posts-microservice
+    app.kubernetes.io/instance: posts-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-posts-microservice:07db74b3dd4888026a2e852c6fca860157aa910a

kubernetes/manifests/microservices/profiles/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: profiles-microservice
   namespace: microservices
+  labels:
+    app: profiles-microservice
+    app.kubernetes.io/instance: profiles-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-profiles-microservice:07db74b3dd4888026a2e852c6fca860157aa910a

kubernetes/manifests/microservices/users/application.yaml

@@ -3,6 +3,9 @@ kind: Application
 metadata:
   name: users-microservice
   namespace: microservices
+  labels:
+    app: users-microservice
+    app.kubernetes.io/instance: users-microservice
 
 spec:
   image: ghcr.io/archisman-mridha/instagram-clone-users-microservice:07db74b3dd4888026a2e852c6fca860157aa910a

kubernetes/operators/application/pkg/controller/application.go

@@ -325,7 +325,10 @@ func (c *Controller) createOrUpdateDeployment(ctx context.Context, application *
 	podTemplateSpecObject := coreV1.PodTemplateSpec{
 		ObjectMeta: metav1.ObjectMeta{
 			Labels: map[string]string{
-				"microservice": name,
+				"app":                          name,
+				"app.kubernetes.io/instance":   name,
+				"app.kubernetes.io/part-of":    name,
+				"app.kubernetes.io/managed-by": c.name,
 			},
 		},
 
@@ -365,6 +368,7 @@ func (c *Controller) createOrUpdateDeployment(ctx context.Context, application *
 			Namespace: namespace,
 			Labels: map[string]string{
 				"app":                          name,
+				"app.kubernetes.io/instance":   name,
 				"app.kubernetes.io/part-of":    name,
 				"app.kubernetes.io/managed-by": c.name,
 			},
@@ -389,7 +393,7 @@ func (c *Controller) createOrUpdateDeployment(ctx context.Context, application *
 
 			Selector: &metav1.LabelSelector{
 				MatchLabels: map[string]string{
-					"microservice": name,
+					"app": name,
 				},
 			},
 
@@ -425,6 +429,8 @@ func (c *Controller) createOrUpdateHpa(ctx context.Context, application *v1alpha
 			Name:      name,
 			Namespace: namespace,
 			Labels: map[string]string{
+				"app":                          name,
+				"app.kubernetes.io/instance":   name,
 				"app.kubernetes.io/part-of":    name,
 				"app.kubernetes.io/managed-by": c.name,
 			},
@@ -498,14 +504,16 @@ func (c *Controller) createOrUpdateService(ctx context.Context, application *v1a
 			Name:      name,
 			Namespace: namespace,
 			Labels: map[string]string{
+				"app":                          name,
+				"app.kubernetes.io/instance":   name,
 				"app.kubernetes.io/part-of":    name,
 				"app.kubernetes.io/managed-by": c.name,
 			},
 		},
 
 		Spec: coreV1.ServiceSpec{
 			Selector: map[string]string{
-				"microservice": name,
+				"app": name,
 			},
 
 			Ports: servicePorts,