Puppet is about configuration management. As you write more and more code in Puppet, patterns will begin to emerge—sections of code that repeat with minor differences. If you were writing your code in a regular scripting language, you'd reach for a function or subroutine definition at this point. Puppet, similar to other languages, supports the blocking of code in multiple ways; when you reach for functions, you can use defined types; when you overload an operator, you can use a parameterized class, and so on. In this chapter, we will show you how to use parameterized classes and introduce the define function to define new user-defined types; following that, we will introduce custom types written in Ruby.
Mastering Puppet - Second Edition
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Mastering Puppet - Second Edition
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Overview of this book
Puppet is a configuration management system and a language. It was written for and by system administrators to manage large numbers of systems efficiently and prevent configuration drifts.
Mastering Puppet deals with the issues faced when scaling out Puppet to handle large numbers of nodes. It will show you how to fit Puppet into your enterprise and allow many developers to work on your Puppet code simultaneously. In addition, you will learn to write custom facts and roll your own modules to solve problems. Next, popular options for performing reporting and orchestration tasks will be introduced in this book. Moving over to troubleshooting techniques, which will be very useful. The concepts presented are useful to any size organization.
By the end of the book, you will know how to deal with problems of scale and exceptions in your code, automate workflows, and support multiple developers working simultaneously.
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Table of Contents (17 chapters)
Mastering Puppet Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
Dealing with Load/Scale
Organizing Your Nodes and Data
Git and Environments
Public Modules
Custom Facts and Modules
Reporting and Orchestration
Exported Resources
Roles and Profiles
Troubleshooting
Index
Customer Reviews