Book Image

Puppet 3: Beginner's Guide

By : John Arundel
Book Image

Puppet 3: Beginner's Guide

By: John Arundel

Overview of this book

<p>Everyone's talking about Puppet, the open-source DevOps technology that lets you automate your server setups and manage websites, databases, and desktops. Puppet can build new servers in seconds, keep your systems constantly up to date, and automate daily maintenance tasks. <br /><br />"Puppet 3 Beginner's Guide" gets you up and running with Puppet straight away, with complete real world examples. Each chapter builds your skills, adding new Puppet features, always with a practical focus. You'll learn everything you need to manage your whole infrastructure with Puppet.<br /><br />"Puppet 3 Beginner’s Guide" takes you from complete beginner to confident Puppet user, through a series of clear, simple examples, with full explanations at every stage.</p> <p>Through a series of worked examples introducing Puppet to a fictional web company, you'll learn how to manage every aspect of your server setup. Switching to Puppet needn't be a big, long-term project; this book will show you how to start by bringing one small part of your systems under Puppet control and, little by little, building to the point where Puppet is managing your whole infrastructure.</p> <p>Presented in an easy-to-read guide to learning Puppet from scratch, this book explains simply and clearly all you need to know to use this essential IT power tool, all the time applying these solutions to real-world scenarios.</p>
Table of Contents (17 chapters)
Puppet 3 Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Summary


A quick rundown of what we've learnt in this chapter.

Packages

The package resource is used to manage packages. To install a package, you set the ensure attribute to installed.

To remove the package, use ensure => absent.

To install a specific version VERSION, use ensure => VERSION.

To install the latest version of the package available in the repo, use ensure => latest.

Modules

To help organize your code, you can put related resources into a module. For example, to create an nginx module, create the file modules/nginx/manifests/init.pp and put this in it:

# Manage nginx webserver
class nginx {
  ...
}

To apply this to a node, use:

include nginx

Services

To manage services, use the service resource type. The ensure attribute controls whether or not the service should be running. To specify that the service should be running, use ensure => running. To specify that it should be stopped, use ensure => stopped.

Starting services at boot

The enable attribute controls whether or not...