I'm struggling to find any documentation relating to the configuration of Extensible Service Proxy and Google Endpoints relating to the correct pattern for deploying multiple versions of an API.

Brief overview - I have docker building out two releases of an API. they run in separate containers.

I currently have a kubernetes pod with ESP and APIv1.

Really I want to run a pod with ESP+APIv1 and a pod with ESP+APIv2 but I can work out how this would work - my external IP and DNS would all point at one pod - Endpoints doesn't seem to be contacted until the user gets to the ESP service, is there some mechanism for passing to another ESP instance - I'm clearly missing something here.

OR - In order to run multiple versions should I be running a pod with ESP, APIv1, and APIv2 in it? That doesn't seem ideal from a scalability or management point of view.