If you're looking to build a deployment tool from scratch, please consider Spinnaker first. I work for Netflix, and it's an open source Cloud Deployment Tool th

If you're looking to build a deployment tool from scratch, please consider Spinnaker first. I work for Netflix, and it's an open source Cloud Deployment Tool they developed in-house (http://www.spinnaker.io http://www.spinnaker.io). It's excellent, I use it daily.