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Puppet 5 Essentials Third Edition

You're reading from   Puppet 5 Essentials Third Edition A fast-paced guide to automating your infrastructure

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787284715
Length 262 pages
Edition 3rd Edition
Tools
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Authors (2):
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Martin Alfke Martin Alfke
Author Profile Icon Martin Alfke
Martin Alfke
Felix Frank Felix Frank
Author Profile Icon Felix Frank
Felix Frank
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Table of Contents (10) Chapters Close

Preface 1. Writing Your First Manifests 2. Puppet Server and Agents FREE CHAPTER 3. A Peek into the Ruby Part of Puppet - Facts, Types, and Providers 4. Combining Resources in Classes and Defined Types 5. Combining Classes, Configuration Files, and Extensions into Modules 6. The Puppet Beginners Advanced Parts 7. New Features from Puppet 4 and 5 8. Separation of Code and Data with Hiera 9. Puppet Roles and Profiles

Managing resources from data

You can now move configuration settings to Hiera and dedicate your manifest to logic. This works seamlessly as far as classes and their parameters are concerned, because class parameters automatically retrieve their values from Hiera. For configuration that requires you to instantiate resources, you still need to write the full manifests and add manual lookup function calls.

For example, an Apache web server requires some global settings, but the interesting parts of its configuration are typically performed in virtual host configuration files. Puppet models them with defined resource types. If you want to configure an iptables firewall, you have to declare lots of resources of the firewall type (available through the puppetlabs-firewall module).

Such elaborate resources can clutter up your manifest, yet they mostly represent data. There is no inherent...

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