[ende42]

You're right. It's more like a docker philosophy or best practice, not a restriction. And a best practice not everybody agrees on that is [1][2]. I'm using some docker containers based on Phusions base image myself. It works fine. Others of my containers are just running one process. I found it feels like a cleaner architecture when I manage to bundle concerns in a way so the resulting containers are stateless. But when I don't achieve that I don't pull my hair out over it. Whatever floats your boat.

[1] http://phusion.github.io/baseimage-docker/ [2] https://news.ycombinator.com/item?id=7258009