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

Summary


In this chapter we've outlined some of the problems with maintaining configuration data in Puppet manifests, and introduced Hiera as a powerful solution. We've seen how to configure Puppet to use the Hiera data store, and how to query Hiera keys in Puppet manifests using lookup().

We've looked at how to write Hiera data sources, including string, array, and hash data structures, and how to interpolate values into Hiera strings using lookup(), including Puppet facts and other Hiera data, and how to duplicate Hiera data structures using alias(). We've learned how Hiera's hierarchy works, and how to configure it using the hiera.yaml file.

We've seen how our example Puppet infrastructure is configured to use Hiera data, and demonstrated the process by looking up a data value in a Puppet manifest. In case of problems, we also looked at some common Hiera errors, and we've discussed rules of thumb about when to put data into Hiera.

We've explored using Hiera data to create resources, using...