Too Long; Didn't Read
An open-source ruby gem called terra_boi was downloaded 1,000 times in the first 10 days. It allows you to immediately deploy a rails application (app servers, load balancer, DB, and S3 bucket) to production with zero downtime. Terraform is an IaC tool for defining and provisioning custom infrastructure. It is currently only built to generate rails apps for the command rake deploy. Deployment requires running several commands (listed in the README.md)