I just (in the last two weeks or so) started using Molecule. It took a bit to get everything set up and figured out but now that I've got things the way I want

I just (in the last two weeks or so) started using Molecule. It took a bit to get everything set up and figured out but now that I've got things the way I want them it really is pretty awesome. I'm using it with Vagrant and VirtualBox at the moment, just because that was the easiest way -- if you aren't already using Docker, that is -- to get started (due to available documentation, examples, etc.) but eventually I'd like to use both Docker and my ESXi lab for testing. Testing w/ bare-metal was always a pain in the ass as I'd constantly need to "reset" the hosts to a specific "known good" starting point. I have everything set up for automated network installs, though, so it only takes 5 minutes or so to wipe and reinstall a physical host. Now, I'm doing all my Ansible testing against VMs on VirtualBox, running from an image generated by Packer. Those images use the exact same preseed.cfg file I use on the bare-metal host, making it sooooo much easier. I do all my testing on the VMs, make sure everything is correct, and then run it against the physical host once for "verification".