update example for latest api version (#2072)

Author: tlliddle

docs/examples/2048/2048_full_latest.yaml

@@ -0,0 +1,62 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: game-2048
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: game-2048
+  name: deployment-2048
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: app-2048
+  replicas: 5
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: app-2048
+    spec:
+      containers:
+      - image: alexwhen/docker-2048
+        imagePullPolicy: Always
+        name: app-2048
+        ports:
+        - containerPort: 80
+---
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: game-2048
+  name: service-2048
+spec:
+  ports:
+    - port: 80
+      targetPort: 80
+      protocol: TCP
+  type: NodePort
+  selector:
+    app.kubernetes.io/name: app-2048
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  namespace: game-2048
+  name: ingress-2048
+  annotations:
+    kubernetes.io/ingress.class: alb
+    alb.ingress.kubernetes.io/scheme: internet-facing
+    alb.ingress.kubernetes.io/target-type: ip
+spec:
+  rules:
+    - http:
+        paths:
+        - path: /
+          pathType: Prefix
+          backend:
+            service:
+              name: service-2048
+              port:
+                number: 80

docs/guide/ingress/spec.md

@@ -1,7 +1,7 @@
 # Ingress specification
 This document covers how ingress resources work in relation to The AWS Load Balancer Controller.
 
-An example ingress, from [example](../../examples/2048/2048_full.yaml) is as follows.
+An example ingress for Kubernetes Version 1.18 and below, from [example](../../examples/2048/2048_full.yaml) is as follows.
 
 ```yaml
 apiVersion: extensions/v1beta1
@@ -24,6 +24,32 @@ spec:
               servicePort: 80
 ```
 
+An example ingress for Kubernetes Version 1.19 and above, from [example](../../examples/2048/2048_full_latest.yaml) is as follows.
+
+```yaml
+apiVersion: extensions/v1
+kind: Ingress
+metadata:
+  name: "2048-ingress"
+  namespace: "2048-game"
+  annotations:
+    kubernetes.io/ingress.class: alb
+  labels:
+    app: 2048-nginx-ingress
+spec:
+  rules:
+    - host: 2048.example.com
+      http:
+        paths:
+        - path: /
+          pathType: Prefix
+          backend:
+            service:
+              name: service-2048
+              port:
+                number: 80
+```
+
 The host field specifies the eventual Route 53-managed domain that will route to this service.
 
 The service, service-2048, must be of type NodePort in order for the provisioned ALB to route to it.(see [echoserver-service.yaml](../../examples/echoservice/echoserver-service.yaml))