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Puppet 5 Cookbook

You're reading from   Puppet 5 Cookbook Jump start your Puppet 5.x deployment using engaging and practical recipes

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Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788622448
Length 394 pages
Edition 4th Edition
Tools
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Author (1):
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Thomas Uphill Thomas Uphill
Author Profile Icon Thomas Uphill
Thomas Uphill
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Table of Contents (12) Chapters Close

Preface 1. Puppet Language and Style FREE CHAPTER 2. Puppet Infrastructure 3. Writing Better Manifests 4. Working with Files and Packages 5. Users and Virtual Resources 6. Managing Resources and Files 7. Managing Applications 8. Servers and Cloud Infrastructure 9. External Tools and the Puppet Ecosystem 10. Monitoring, Reporting, and Troubleshooting 11. Other Books You May Enjoy

Using exported host resources


In the previous example, we used the spaceship syntax to collect virtual host resources for hosts of type database or hosts of type web. You can use the same trick with exported resources. The advantage of using exported resources is that as you add more database servers, the collector syntax will automatically pull in the newly created exported host entries for those servers. This makes your /etc/hosts entries more dynamic.

Getting ready

We will be using exported resources. If you haven't already done so, set up puppetdb and enable storeconfigs to use puppetdb as outlined in Chapter 2, Puppet Infrastructure.

How to do it...

In this example, we will configure database servers and clients to communicate with each other. We'll make use of exported resources to do the configuration:

  1. Create a new database module, db:
t@mylaptop ~/puppet/modules $ mkdir -p db/manifests/
  1. Create a new class for your database servers, db::server:
class db::server {
  @@host {"$::fqdn":
   ...
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