An Ingress Object requires a Controller to enact it. Unlike other Kubernetes controllers, which are part of the kube-controller-manager binary, the Ingress controller is not. Apart from the GCE/Google Kubernetes Engine, the Ingress controller needs to be deployed separately as a Pod.
The most popular Ingress controller is the NGINX controller (https://github.com/kubernetes/ingress-nginx), which is officially supported by Kubernetes and NGINX. Deploy it by running kubectl apply:
$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/cloud-generic.yaml ...
