Kubernetes external ip loadbalancer bare metal

Use services with type nodePort, it will bind your service to a fixed port on all your nodes (http://kubernetes.io/v1.0/docs/user-guide/services.html#type-nodeport)

Then you have to use a loadbalancer (i.e haproxy) to forward calls to this service.

The loadbalancer configuration can be done by a script that use kubernetes /services API.