chore(example): update example Kubernetes app to apps/v1

extras/example/k8s/app-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: app
 spec:
   replicas: 2
+  selector:
+    matchLabels:
+      name: app
   template:
     metadata:
       labels:

extras/example/k8s/client-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: client
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: client
   template:
     metadata:
       labels:

extras/example/k8s/echo-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: echo
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: echo
   template:
     metadata:
       labels:

extras/example/k8s/elasticsearch-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: elasticsearch
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: elasticsearch
   template:
     metadata:
       labels:

extras/example/k8s/frontend-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: frontend
 spec:
   replicas: 2
+  selector:
+    matchLabels:
+      name: frontend
   template:
     metadata:
       labels:

extras/example/k8s/qotd-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: qotd
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: qotd
   template:
     metadata:
       labels:

extras/example/k8s/redis-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: redis
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: redis
   template:
     metadata:
       labels:

extras/example/k8s/search-deployment.yaml

@@ -1,9 +1,12 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: search
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      name: search
   template:
     metadata:
       labels: