Book Image

Puppet 5 Essentials - Third Edition

By : Martin Alfke, Felix Frank
Book Image

Puppet 5 Essentials - Third Edition

By: Martin Alfke, Felix Frank

Overview of this book

Puppet is a configuration management tool that allows you to automate all your IT configurations, giving you control over what you do to each Puppet Agent in a network, and when and how you do it. In this age of digital delivery and ubiquitous Internet presence, it's becoming increasingly important to implement scaleable and portable solutions, not only in terms of software, but also the system that runs it. This book gets you started quickly with Puppet and its tools in the right way. It highlights improvements in Puppet and provides solutions for upgrading. It starts with a quick introduction to Puppet in order to quickly get your IT automation platform in place. Then you learn about the Puppet Agent and its installation and configuration along with Puppet Server and its scaling options. The book adopts an innovative structure and approach, and Puppet is explained with flexible use cases that empower you to manage complex infrastructures easily. Finally, the book will take readers through Puppet and its companion tools such as Facter, Hiera, and R10k and how to make use of tool chains.
Table of Contents (10 chapters)


A template is a frequent occurrence and is one of the best ways for Puppet to manage dynamic file content. Evaluating each template requires extra effort from the compiler, but the gain in flexibility is usually worth it. Variables in templates have to be declared using the Puppet variable syntax with full namespace, or by prodding a hash with variable inside templates and classes.

The concept of virtual resources is much less ubiquitous. Virtual resources allow you to flexibly add certain entities to a node's catalog. The collector syntax that is used for this can also be used to override attribute values, which works for non-virtual resources as well.

Once PuppetDB is installed and configured, you can also export resources so that other node manifests can receive their configuration information. This allows you to model distributed systems quite elegantly.

The resource...