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https://github.com/cpuguy83/docker-grand-ambassador https://github.com/progrium/ambassadord

Interesting, thanks! FWIW, ambassadord has consul integration and that's something I've wanted.

I simply expose ports (or do --net=host) and communicate between hosts in the normal fashion. Unless you don't trust your host I don't see the problem with that.

CoreOS seems to do what you are asking.