[SEJeff]

I think the rocket vs docker idea of open specifications are very different. Docker is fundamentally an API. In theory, you could create a C# version of docker that implements the docker api ontop of windows (when Microsoft adds namespacing support) and it would "just work TM". The same could be said for FreeBSD or anything else really.

Rocket looks very cool, and while it certainly does prevent some of the issues with docker security, it misses some of the benefits... like a remote API as there isn't a rktd, and many people will undoubtedly write them. So in that regard, I'd have to say rocket offers less openness.

With the current docker design, I see no reason why libcontainer couldn't add a rocket or lxd backend and be done with it however. As a sysadmin/developer to builds things, I see this as healthy for the container ecosystem even if it does certainly come off as a bit uncool from @phillips and the coreos crew. I'm kind of biased in that I think the only good multi-host docker / container manager will ultimately be mesos with kubernetes ontop.