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)


Upgrading to Puppet 3 should be done in a step-by-step procedure where your existing code will be evaluated using Puppet 3.8 and the new parser.

Thanks to the type system, it is now possible to deal with data in a far more elegant way directly in your Puppet DSL code. The new functions API allows you to immediately recognize to which module a function belongs by using namespaces. Similar functions can now be combined within a single file by making use of the dispatch method and data types, allowing a form of function overloading.

The new EPP templates offer better understanding of variable sources by using the Puppet syntax for variable references. Passing parameters to templates will allow you to make use of modules in a more flexible way.

Combining EPP templates and the HEREDOC syntax will allow you to keep template code and data directly visible inside your classes...