Hashicorp Terraform for Infrastructure as Code
Terraform is a tool by Hashicorp (who do Vagrant, Packer and other ops tools). You maintain a single configuration file and it trues up your environment, creating and deleting machines, to match the configuration file. Their products are coming together into a cohesive suite. The first part describes the Terraform product.
At 30 mins there’s a description of “DevOps” (that cuts through much of the BS). Basically:
Developers care about: