Since there's a separate thread on Docker, I wanted to mention that I
just created a Devuan Ascii container template for OpenVZ 7.    I haven't
tested it beyond logging into it and seeing things working.  But the
initial build is there, and it's looking better than 1.0 so far.
I've renamed the repo btw as well, since it's all openvz and devuan:
https://github.com/azilber/openvz7-devuan