Book Image

Puppet 5 Beginner's Guide - Third Edition

By : John Arundel
Book Image

Puppet 5 Beginner's Guide - Third Edition

By: John Arundel

Overview of this book

Puppet 5 Beginner’s Guide, Third Edition gets you up and running with the very latest features of Puppet 5, 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 (21 chapters)
Puppet 5 Beginner's Guide Third Edition
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Services


The third most important Puppet resource type is the service: a long-running process that either does some continuous kind of work, or waits for requests and then acts on them. For example, on most systems, the sshd process runs all the time and listens for SSH login attempts.

Puppet models services with the service resource type. The service resources look like the following example (you can find this in service.pp in the /examples/ directory. From now on, I'll just give the filename of each example, as they are all in the same directory):

service { 'sshd':
  ensure => running,
  enable => true,
}

The ensure parameter governs whether the service should be running or not. If its value is running, then as you might expect, Puppet will start the service if it is not running. If you set ensure to stopped, Puppet will stop the service if it is running.

Services may also be set to start when the system boots, using the enable parameter. If enable is set to true, the service will start...