Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Puppet 5 Cookbook

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

Arrow left icon
Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788622448
Length 394 pages
Edition 4th Edition
Tools
Arrow right icon
Author (1):
Arrow left icon
Thomas Uphill Thomas Uphill
Author Profile Icon Thomas Uphill
Thomas Uphill
Arrow right icon
View More author details
Toc

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 an external node classifier

When Puppet runs on a node, it needs to know which classes should be applied to that node. For example, if it is a web server node, it might need to include an Apache class. The normal way to map nodes to classes is in the Puppet manifest itself, for example, in your site.pp file:

node 'web1' {
include apache
}

Alternatively, you can use an External Node Classifier (ENC) to do this job. An ENC is any executable program that can accept the fully-qualified domain name (FQDN) as the first command-line argument ($1). The script is expected to return a list of classes, and parameters, and an optional environment to apply to the node. The output is expected to be in the standard YAML format. When using an ENC, you should keep in mind that the classes applied through the standard site.pp are merged with those provided by the ENC.

Parameters...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image