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)


Sadly, there is a rather substantial issue with both the ordering of containers and the distribution of refresh events: neither will transcend the include statements of further classes. Consider the following example:

class apache {
include apache::service
include apache::package
include apache::config
file { '/etc/apache2/conf.d/passwords.conf':
source => '...',
require => Class['apache'],

I have often mentioned how the comprehensive apache class models everything about the Apache server subsystem, and in the previous section, I went on to explain that directing a require parameter at such a class will make sure that Puppet only touches the dependent resource if the subsystem has been successfully configured.

This is mostly true, but, due to the limitation concerning class boundaries, it doesn't achieve the desired...