Book Image

Puppet 4.10 Beginner's Guide - Second Edition

By : John Arundel
Book Image

Puppet 4.10 Beginner's Guide - Second Edition

By: John Arundel

Overview of this book

Puppet 4.10 Beginner’s Guide, Second Edition, gets you up and running with the very latest features of Puppet 4.10, including Docker containers, Hiera data, and Amazon AWS cloud orchestration. Go from beginner to confident Puppet user with a series of clear, practical examples to help you manage every aspect of your server setup. Whether you’re a developer, a system administrator, or you are simply curious about Puppet, you’ll learn Puppet skills that you can put into practice right away. With practical steps giving you the key concepts you need, this book teaches you how to install packages and config files, create users, set up scheduled jobs, provision cloud instances, build containers, and so much more. Every example in this book deals with something real and practical that you’re likely to need in your work, and you’ll see the complete Puppet code that makes it happen, along with step-by-step instructions for what to type and what output you’ll see. All the examples are available in a GitHub repo for you to download and adapt for your own server setup.
Table of Contents (20 chapters)
Puppet 4.10 Beginner's Guide Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Packages


We've already seen how to install a package using the package resource, and this is all you need to do with most packages. However, the package resource has a few extra features which may be useful.

Uninstalling packages

The ensure attribute normally takes the value installed in order to install a package, but if you specify absent instead, Puppet will remove the package if it happens to be installed. Otherwise, it will take no action. The following example will remove the apparmor package if it's installed (package_remove.pp):

package { 'apparmor':
  ensure => absent,
}

By default, when Puppet removes packages, it leaves in place any files managed by the package. To purge all files associated with the package, use purged instead of absent.

Installing specific versions

If there are multiple versions of a package available to the system's package manager, specifying ensure => installed will cause Puppet to install the default version (usually the latest). But if you need a specific...