diff --git a/deploy/default-backend.yaml b/deploy/default-backend.yaml
index 64f6f58ad..7894d0f7b 100644
--- a/deploy/default-backend.yaml
+++ b/deploy/default-backend.yaml
@@ -7,6 +7,9 @@ metadata:
   namespace: ingress-nginx
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: default-http-backend
   template:
     metadata:
       labels:
diff --git a/docs/examples/customization/external-auth-headers/deploy/auth-service.yaml b/docs/examples/customization/external-auth-headers/deploy/auth-service.yaml
index 87a58730b..af8f09518 100644
--- a/docs/examples/customization/external-auth-headers/deploy/auth-service.yaml
+++ b/docs/examples/customization/external-auth-headers/deploy/auth-service.yaml
@@ -7,6 +7,9 @@ metadata:
   namespace: default
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: demo-auth-service
   template:
     metadata:
       labels:
diff --git a/docs/examples/customization/external-auth-headers/deploy/echo-service.yaml b/docs/examples/customization/external-auth-headers/deploy/echo-service.yaml
index 7145a3a46..363c4bf3d 100644
--- a/docs/examples/customization/external-auth-headers/deploy/echo-service.yaml
+++ b/docs/examples/customization/external-auth-headers/deploy/echo-service.yaml
@@ -7,6 +7,9 @@ metadata:
   namespace: default
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: demo-echo-service
   template:
     metadata:
       labels:
diff --git a/docs/examples/http-svc.yaml b/docs/examples/http-svc.yaml
index 159518ff5..ad074b9d0 100644
--- a/docs/examples/http-svc.yaml
+++ b/docs/examples/http-svc.yaml
@@ -4,6 +4,9 @@ metadata:
   name: http-svc
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: http-svc
   template:
     metadata:
       labels:
diff --git a/docs/examples/static-ip/nginx-ingress-controller.yaml b/docs/examples/static-ip/nginx-ingress-controller.yaml
index 3368cbafc..372845cd9 100644
--- a/docs/examples/static-ip/nginx-ingress-controller.yaml
+++ b/docs/examples/static-ip/nginx-ingress-controller.yaml
@@ -6,6 +6,9 @@ metadata:
     k8s-app: nginx-ingress-controller
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: nginx-ingress-controller
   template:
     metadata:
       labels:
diff --git a/images/echoheaders/echo-app.yaml b/images/echoheaders/echo-app.yaml
index 4ffe68134..1e9a172b0 100644
--- a/images/echoheaders/echo-app.yaml
+++ b/images/echoheaders/echo-app.yaml
@@ -22,6 +22,9 @@ metadata:
     app: echoheaders
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: echoheaders
   template:
     metadata:
       labels: