Book Image

Extending Puppet - Second Edition

By : Alessandro Franceschi, Jaime Soriano Pastor
Book Image

Extending Puppet - Second Edition

By: Alessandro Franceschi, Jaime Soriano Pastor

Overview of this book

Puppet has changed the way we manage our systems, but Puppet itself is changing and evolving, and so are the ways we are using it. To tackle our IT infrastructure challenges and avoid common errors when designing our architectures, an up-to-date, practical, and focused view of the current and future Puppet evolution is what we need. With Puppet, you define the state of your IT infrastructure, and it automatically enforces the desired state. This book will be your guide to designing and deploying your Puppet architecture. It will help you utilize Puppet to manage your IT infrastructure. Get to grips with Hiera and learn how to install and configure it, before learning best practices for writing reusable and maintainable code. You will also be able to explore the latest features of Puppet 4, before executing, testing, and deploying Puppet across your systems. As you progress, Extending Puppet takes you through higher abstraction modules, along with tips for effective code workflow management. Finally, you will learn how to develop plugins for Puppet - as well as some useful techniques that can help you to avoid common errors and overcome everyday challenges.
Table of Contents (19 chapters)
Extending Puppet Second Edition
About the Authors
About the Reviewer

Meta parameters

Meta parameters are general-purpose parameters available to any resource type, even if not explicitly defined. They can be used for different purposes:

  • Manage dependencies and resources ordering (more on them in the next section): before, require, subscribe, notify, and stage

  • Manage resources' application policies: audit (audit the changes done on the attributes of a resource), noop (do not apply any real change for a resource), schedule (apply the resources only within a given time schedule), and loglevel (manage the log verbosity)

  • Add information to a resource: alias (adds an alias that can be used to reference a resource) and tag (add a tag that can be used to refer to group resources according to custom needs; we will see a usage case later in this chapter in the external resources section)