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Red Hat Enterprise Linux Server Cookbook

You're reading from   Red Hat Enterprise Linux Server Cookbook Over 60 recipes to help you build, configure, and orchestrate RHEL 7 Server to make your everyday administration experience seamless

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784392017
Length 250 pages
Edition 1st Edition
Tools
Concepts
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Authors (2):
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Jakub Gaj Jakub Gaj
Author Profile Icon Jakub Gaj
Jakub Gaj
William Leemans William Leemans
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William Leemans
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Toc

Table of Contents (12) Chapters Close

Preface 1. Working with KVM Guests FREE CHAPTER 2. Deploying RHEL "En Masse" 3. Configuring Your Network 4. Configuring Your New System 5. Using SELinux 6. Orchestrating with Ansible 7. Puppet Configuration Management 8. Yum and Repositories 9. Securing RHEL 7 10. Monitoring and Performance Tuning Index

Defining nodes and node grouping


In order to push a manifest, its classes, and assets to systems, they need to be known by Puppet Master. Grouping is practical if you want to push a manifest to a number of hosts without having to modify each configuration node.

How to do it…

In contrast to what the title wants you to believe, you cannot create a group and add nodes. However, you can group nodes and make them behave in a similar way to groups.

Nodes and node groups are defined in /etc/puppet/manifests/site.pp or a file at /etc/puppet/manifests/site.pp.

Create the configuration node

Create a /etc/puppet/manifests/site.pp/rhel7-client.pp file with the following contents:

node 'rhel7-client.critter.be' {
}

Create a node group

Create a /etc/puppet/manifests/site.pp/rhel7-clientgroup.pp file with the following contents:

node 'rhel7-client00.critter.be', 'rhel7-client01.critter.be', 'rhel7-client02.critter.be' {
}

There's more…

If you have a strict naming convention, you can use regular expressions to define...

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