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)

Understanding the need for separate data storage

Looking back at what you have implemented during this book so far, you have managed to create some very versatile code that did very useful things in an automatic fashion. Your nodes can distribute entries for /etc/hosts among themselves. They register each other's public SSH key for authentication. A node can automatically register itself to a central Cacti server.

Thanks to Facter, Puppet has the information that allows the effortless handling of these use cases. Many configuration items are unique to each node only because they refer to a detail (such as an IP address or a generated key) that is already defined. Sometimes, the required configuration data can only be found on a remote machine, which Puppet handles through exported resources. Such manifest designs that can rely on facts are very economical. The information...