The Ingress controller examples have moved to the kubernetes/ingress repository.
To configure which services and ports will be exposed
kubectl create -f udp-configmap-example.yaml
The file udp-configmap-example.yaml uses a ConfigMap where the key is the external port to use and the value is
<namespace/service name>:<service port>
It is possible to use a number or the name of the port.
kubectl create -f rc-udp.yaml