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)

The business use case and node classification

With all implementations now being in place, we look forward to how to do node classification.

There are several options available and which one is the best solution mostly depends on your platform.

When you have a very diverse platform, the concept of roles as another abstraction layer is not very useful, as it mostly leads to duplicate code. In this case, most people decided to use profiles for node classification.

When you have large sets of identically configured systems, one wants to go ahead with the role pattern and classify systems by their business use case.

The business use case allows you to describe systems not by what they do, but by what they are used for.

Think about the phpmyadmin installation. Depending on use case and business owner, one might have different classification names:

A technician will use the term database...