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)

Technical component modules

Until now, we have referred to modules as a strict directory structure containing classes, static files, templates, and extensions. We now must differentiate between upstream or generic modules and our platform implementation modules.

Modules that take care of a specific technical component are now referred to as technical component modules. Technical components themselves are a set of configurations for a certain software running on a system, such as Nginx, Postgres, or LDAP.

There has always been the problem of whether a module is a technical component module or not. There are some patterns that allow you to identify technical component modules:

  • Developed upstream with active community
  • Open source with README and LICENSE files
  • Only manages what is required
  • Clearly described entry class with parameters for adoption and reusability
  • Allows stacking...