Add example for nginx in aws

examples/aws/nginx/README.md

@@ -0,0 +1,22 @@
+# NGINX Ingress running in AWS
+
+This example shows how is possible to use the nginx ingress controller in AWS behind an ELB configured with Proxy Protocol.
+
+```console
+kubectl create -f ./nginx-ingress-controller.yaml
+```
+
+This command creates:
+- a default backend deployment and service.
+- a service with `type: LoadBalancer` configuring Proxy Protocol in the ELB (`service.beta.kubernetes.io/aws-load-balancer-proxy-protocol: '*'`).
+- a configmap for the ingress controller enabling proxy protocol in NGINX (`use-proxy-protocol: "true"`)
+- a deployment for the ingress controller
+
+Is the proxy protocol necessary?
+
+No but only enabling the procotol is possible to keep the real source IP address requesting the connection.
+
+### References
+
+- http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-proxy-protocol.html
+- https://www.nginx.com/resources/admin-guide/proxy-protocol/