I previously published this article on my personal blog, but thought I would share it today with our Codeship readers. Enjoy! Docker is a new way to containerize services. The primary use so far has been for deploying services in a very thin container. I experimented with using it for Continuous Integration so that I could run our rails tests within a consistent environment, and then I realized th
![Using Docker to Parallelize Rails Tests](https://cdn-ak-scissors.b.st-hatena.com/image/square/fe4620bdf95d4d499d3a5f90547082c441dbba86/height=288;version=1;width=512/https%3A%2F%2Fimages.ctfassets.net%2Fvtn4rfaw6n2j%2F7MnAVo94NiklcDhgJCbRpL%2Ffe552c0e6f09c4512b160b98b73a73ab%2Fhttps___no-cache.hubspot.com_cta_default_1169977_964db6a6-69da-4366-afea-b129019aff07.png%3Fw%3D1200%26h%3D630%26fit%3Dfill)