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Mastering Chef

You're reading from   Mastering Chef Build, deploy, and manage your IT infrastructure to deliver a successful automated system with Chef in any environment

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781783981564
Length 374 pages
Edition 1st Edition
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Author (1):
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Mayank Joshi Mayank Joshi
Author Profile Icon Mayank Joshi
Mayank Joshi
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Table of Contents (15) Chapters Close

Preface 1. Introduction to the Chef Ecosystem FREE CHAPTER 2. Knife and Its Associated Plugins 3. Chef and Ruby 4. Controlling Access to Resources 5. Starting the Journey to the World of Recipes 6. Cookbooks and LWRPs 7. Roles and Environments 8. Attributes and Their Uses 9. Ohai and Its Plugin Ecosystem 10. Data Bags and Templates 11. Chef API and Search 12. Extending Chef 13. (Ab)Using Chef Index

Environment run lists


One of the major reasons why roles aren't popular is due to the fact that it's hard to maintain versioned run lists. For example, you might have created web servers with the role webserver that had a run list containing the base and nginx recipes. Now, today you needed to add another recipe, say logstash, to these servers. So you went ahead and added the recipe to the run list in your role and triggered a chef-client run either automatically or manually. This is where you didn't realize that your new recipe code had a bug and now all your ten servers are in a messed-up state.

There are many ways to overcome this issue; however, I like to use environment run lists just for this very purpose. I split my infrastructure into different environments such as dev, staging, and production. Whenever I write a new piece of Chef code, I ensure that I push it into the run list associated with the dev environment initially for local testing. Once it has passed there, I add the recipe...

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