The ingress controller is very descriptively named, it controls ingress to the cluster and manages routing to internal services via a single exposed IP address. (This is a gross simplification but it’s good enough for now.)
cd aegaeon-cluster && mkdir nginx-ingress-controller
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.4/deploy/static/provider/aws/deploy.yaml
kubectl --namespace default get services -o wide -n ingress-nginx