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)

New Features from Puppet 4 and 5

Now that we have a complete overview of the Puppet DSL and its concepts, it is time to look at the newest Puppet features, which were introduced with Puppet version 4. The parser, which compiles the catalog, was basically rewritten from scratch for better performance. The milestone release also added some missing functionality and coding principles.

Puppet 4 and newer versions do not only offer new functionality, but break with old practices and remove some functionality that is not considered best practice anymore. This necessitates that any existing manifest code needs proper testing, and potentially needs lots of changes to be compatible with Puppet 4.

Within this chapter, the following topics will be covered:

  • Upgrading to Puppet 4
  • Using the Puppet type system
  • Learning lambdas and functions
  • Creating Puppet 4 functions
  • Leveraging the new template...