It's called Smartstack and is also entirely open-source - http://nerds.airbnb.com/smartstack-service-discovery-cloud/ http://nerds.airbnb.com/smartstack-service

It's called Smartstack and is also entirely open-source - http://nerds.airbnb.com/smartstack-service-discovery-cloud/ http://nerds.airbnb.com/smartstack-service-discovery-cloud/ Having been a long-time user, I can tell you the added complexity of every service having to allocate its own port, then tracking that port across every other service is a lot of overhead on its own. Not to mention you also have to run a zookeeper cluster and two additional daemons on every instance. All in all it's a good concept, but slightly too complex for my needs. Recently made the switch back to using internal ELB's for every service and not looking back.