Ansible for DevOps: Server and Configuration Management for Humans

Ansible is a simple, but powerful, server and configuration management tool (with a few other tricks up its sleeve). This book will help those familiar with the command line and basic shell scripting start using Ansible to provision and manage anywhere from one to thousands of servers.
The book begins with fundamentals, like installing Ansible, setting up a basic inventory file, and basic concepts, then guides you through Ansible's many uses, including ad-hoc commands, basic and advanced playbooks, application deployments, custom modules, and special cases like running ansible in 'pull' mode when you have thousands of servers to manage (or more). Everything is explained with pertinent real-world examples, often using Vagrant-managed virtual machines.
As this is a work-in-progress, community feedback and suggestions will be taken into account as to what topics will be covered, and with how much depth they will be covered.
Examples in the book are tested with the latest version of Ansible (1.9.x as of this writing).