[geerlingguy]

I'm doing something similar using Docker to run tests on Ansible roles on Ubuntu 12/14 and CentOS 6/7 in parallel within Travis CI: https://github.com/geerlingguy/ansible-role-apache/blob/mast...

I've been playing around with the technique a while, but a different contributor ultimately did the final work for me, and he wrote up a great blog post on the process: http://bertvv.github.io/notes-to-self/2015/12/13/testing-ans...

While I'm yet to find a compelling reason for me to use Docker for my production environments (though the is one SaaS service I run which may benefit as Docker's warts have become much more manageable), it's excellent in a CI environment!