I saw your articulate response in that thread. Thank you for that response. I don't need multiple dockerfiles right now, but if i invest more into docker, I will. I think your responses might have convinced shykes that the need won't be going away.

There was a similar disconnect on data volumes a while ago that took some convincing before the discussion moved forward. It has always been trivial in OpenVZ to bind mount into a container (ie: share a very large read-only mount between containers).