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)

Design patterns

Your knowledge of classes and defined types is still rather academic. You have learned about their defining aspects and the syntax to use them, but we have yet to give you a feeling of how these concepts come to bear in different real-life scenarios.

The following sections will present an overview of what you can do with these language tools.

Writing comprehensive classes

Many classes are written to make Puppet perform momentous tasks on the agent platform. Of these, the Apache class is probably one of the more modest examples. You can conceive a class that can be included from any machine's manifest and make sure that the following conditions are met:

  • The firewalling software is installed and configured...