AWS CodeDeploy is a tool for automating application deployments to EC2 instances and clusters. It can pull application archives from either S3 or GitHub, and then allows you to specify how to install, configure, and run the application via a configuration specification and optionally hook scripts. When setup correctly, it can provide a powerful way to automate your deployments.
I started looking into it because I wanted to try out my site on PHP 7, and do a few new things with nginx that I wasn't doing before. Additionally, I've accidently forgotten to deploy a few times in the past year after writing a blog post, and I wanted to see if I solve that situation; I'd really enjoyed the "push-to-deploy" paradigm of OpenShift and EngineYard in the past, and wanted to see if I could recreate it.
Enrico first pointed me to the service, and I was later inspired by a slide deck by Ric Harvey. The process wasn't easy, due to a number of things that are not documented or not fully documented in the AWS CodeDeploy documentation, but in the end, I was able to accomplish exactly that: push-to-deploy. This post details what I found, some recommendations on how to create your deployments, and ways to avoid some of the pitfalls I fell into.