Dan Bode & Nan Liu 
Puppet Types and Providers [PDF ebook] 
Extending Puppet with Ruby

Puppets true power exists in the simple resource model it uses to manage the state of complex operating systems. This concise guide shows you how to extend that model and implement custom functionality on top of Puppet by working with the type and provider APIs.Two experts from Puppet Labs explain the concepts behind these APIs, and provide instructions and examples to help you write your own fully functional types and providers. Youll also delve into Puppets source code to get a better understanding of how types and providers are implemented internally. If youre familiar with basic Puppet concepts, youre ready to get started.Learn the fundamental concepts behind resources, and become familiar with the structure of Puppets Resource Model Discover how the type API is used to create new resource types that Puppet can manage Understand how providers interact with the system to achieve the desired state of a declared resource Explore advanced features to get a more complete understanding of how Puppet works Simplify the troubleshooting process when developing types and providers