[ckuttruff]

Couldn't agree more with this sentiment. I've started using docker to replace vagrant/VMs for my test workflow. I use it to spin up a container, provision our server code via chef, and test out various changes.

Is chef my favorite too? No. Could I be using docker in a more optimal manner? Sure. But the reality is that I wanted the simplest possible path to integrate docker within our workflow, and it already saves a ton of resources. I run linux on a machine with 4G of ram, so believe me, utilizing containers for testing infrastructure changes is a huge improvement.

So docker as a lightweight VM is most definitely a valid use case, IMHO