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Mastering Chef

By : Mayank Joshi
Book Image

Mastering Chef

By: Mayank Joshi

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Mastering Chef
Mayank Joshi
Jun, 2015 | 374 pages
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Table of Contents (20 chapters)
Mastering Chef
Mastering Chef
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Introduction to the Chef Ecosystem
Introduction to the Chef Ecosystem
Different modes of running Chef
Terminology used in the world of Chef
The anatomy of a Chef run
Setting up a work environment
Summary
2
Knife and Its Associated Plugins
Knife and Its Associated Plugins
Introducing Knife
Summary
3
Chef and Ruby
Chef and Ruby
Ruby
IRB
Variables and types
Symbols
Basic operations
Conditional statements and loops
Methods
Arrays
Bang methods
Hashes
Classes and objects
Summary
4
Controlling Access to Resources
Controlling Access to Resources
The bootstrap process
Authentication
Authorization
Summary
5
Starting the Journey to the World of Recipes
Starting the Journey to the World of Recipes
Resources
Recipes
Best practices when writing recipes
Summary
6
Cookbooks and LWRPs
Cookbooks and LWRPs
Cookbooks
Custom resources
Summary
7
Roles and Environments
Roles and Environments
Managing roles
Managing environments
Setting up an environment on a node
Role and environment attributes
Environment run lists
Summary
8
Attributes and Their Uses
Attributes and Their Uses
Attribute naming
Different types of attributes
Different sources of attributes
Attribute precedence
Attribute whitelisting
Summary
9
Ohai and Its Plugin Ecosystem
Ohai and Its Plugin Ecosystem
Running the Ohai binary
Ohai plugins
Custom plugins
Summary
10
Data Bags and Templates
Data Bags and Templates
Data bags
Templates
Summary
11
Chef API and Search
Chef API and Search
Prerequisites for using Chef API
Authentication of requests
Endpoints
Search
Ridley
Summary
12
Extending Chef
Extending Chef
Custom Knife plugins
Custom Chef handlers
Summary
13
(Ab)Using Chef
(Ab)Using Chef
The dynamic server list in Capistrano using Chef
Capistrano style deployments using Chef's "deploy" resource
Extending Chef to bootstrap distributed systems
Test-driven development with Chef
Types of tests
Summary
Index
Index

Attribute precedence

Attributes are always applied by the chef-client in the following order:

  1. The default attribute specified in a cookbook attribute file.

  2. The default attribute specified in a recipe.

  3. The default attribute specified in an environment.

  4. The default attribute specified in a role.

  5. The force_default attribute specified in a cookbook attribute file.

  6. The force_default attribute specified in a recipe.

  7. The normal attribute specified in a cookbook attribute file.

  8. The normal attribute specified in a recipe.

  9. The override attribute specified in a cookbook attribute file.

  10. The override attribute specified in a recipe.

  11. The override attribute specified in a role.

  12. The override attribute specified in an environment.

  13. The force_override attribute specified in a cookbook attribute file.

  14. The force_override attribute specified in a recipe.

  15. The automatic attribute collected during the Ohai run.

The last attribute in this list has highest precedence and it's the one that dictates the value associated with an attribute...

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