We're been using Docker and coreos+fleet for our production environment at GaiaGPS for a few months now, and have been very impressed. We use quay.io for build

We're been using Docker and coreos+fleet for our production environment at GaiaGPS for a few months now, and have been very impressed. We use quay.io for building our repositories, triggered by a github commit. I agree with what others have said, and for us, the biggest benefit we see is keeping our production environment up to date, and stable. We're a small shop, and want to waste as little time as possible maintaining our production environment. We were able to go from 1 host (that occasionally went down -- and downtime for every deploy) to a 3-node coreos cluster fairly easily. We can also scale up, or even recreate the cluster, very easily.