Book Image

Puppet 5 Cookbook - Fourth Edition

By : Thomas Uphill
Book Image

Puppet 5 Cookbook - Fourth Edition

By: Thomas Uphill

Overview of this book

Puppet is a configuration management system that automates all your IT configurations, giving you control of managing each node. Puppet 5 Cookbook will take you through Puppet's latest and most advanced features, including Docker containers, Hiera, and AWS Cloud Orchestration. Updated with the latest advancements and best practices, this book delves into various aspects of writing good Puppet code, which includes using Puppet community style, checking your manifests with puppet-lint, and learning community best practices with an emphasis on real-world implementation. You will learn to set up, install, and create your first manifests with version control, and also learn about various sysadmin tasks, including managing configuration files, using Augeas, and generating files from snippets and templates. As the book progresses, you'll explore virtual resources and use Puppet's resource scheduling and auditing features. In the concluding chapters, you'll walk through managing applications and writing your own resource types, providers, and external node classifiers. By the end of this book, you will have learned to report, log, and debug your system.
Table of Contents (16 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Generating manifests with the Puppet resource command


If you have a server that is already configured as it needs to be, or nearly so, you can capture that configuration as a Puppet manifest. The puppet resource command generates Puppet manifests from the existing configuration of a system. For example, you can have puppet resource generate a manifest that creates all the users found on the system. This is very useful to take a snapshot of a working system and get its configuration quickly into Puppet.

How to do it...

Here are some examples of using puppet resource to get data from a running system:

  1. To generate the manifest for a particular user, run the following command:
t@mylaptop $ puppet resource user thomas
user { 'thomas':
  ensure  => 'present',
  comment => 'Thomas Uphill',
  gid     => 1000,
  groups  => ['wheel', 'audio', 'pulse-rt',   'jackuser', 'vboxusers', 'docker'], 
  home    => '/home/thomas',
  shell   => '/bin/bash',
  uid     => 1000,
}
  1. For a particular...