> (for example if one of your NGinx instances goes down there's nothing to remove it from the pool) My plan to solve this was to use Doozer with a small daemon

> (for example if one of your NGinx instances goes down there's nothing to remove it from the pool) My plan to solve this was to use Doozer with a small daemon in each agent server which would keep some kind of registry of the services running on the machine. I think that could be relatively lightweight and with the ability to broadcast via watches there could be some kind of action attached to a node being removed and added.