Book Image

Chef Infrastructure Automation Cookbook Second Edition

By : Matthias Marschall
Book Image

Chef Infrastructure Automation Cookbook Second Edition

By: Matthias Marschall

Overview of this book

Table of Contents (14 chapters)
Chef Infrastructure Automation Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using search to find nodes


If you are running your infrastructure in any type of a virtualized environment, such as a public or private cloud, the server instances that you use will change frequently. Instead of having a well-known set of servers, you destroy and create virtual servers regularly.

Your cookbooks cannot rely on hardcoded server names when you need in this situation, a list of available servers.

Chef provides a way to find nodes by their attributes, for example, their roles. In this section, we'll see how you can retrieve a set of nodes to use them in your recipes.

Getting ready

Make sure that you have a cookbook called my_cookbook, as described in the Creating and using cookbooks section in Chapter 1, Chef Infrastructure.

How to do it...

Let's see how we can find all nodes having a certain role:

  1. Create a role called web that has my_cookbook in its run list. This command will open a JSON definition of your role in your default editor. You need to add "recipe[my_cookbook]" to "run_list...