A Brief Introduction to Infrastructure Automation

I'm a bit new to this, but I found the concept/discussion of immutable infrastructure particularly interesting:

> Immutable infrastructure allows creating identical replicas of every version of an application. This allows you to build auto-scaling mechanisms, to replicate issues occurring in a production environment without interfering with the actual production environment, to run tests against exact production infrastructure before deploying, and much more. These are invaluable techniques for any production system.