Book Image

Extending Puppet

By : Alessandro Franceschi
Book Image

Extending Puppet

By: Alessandro Franceschi

Overview of this book

Table of Contents (21 chapters)
Extending Puppet
About the Author
About the Reviewers


In this chapter, we have reviewed and summarized the basic Puppet principles that are a prerequisite to better understand the contents of the book. We have seen how Puppet is configured and what its main components are: manifests, resources, nodes, and classes, and the power of the Resource Abstraction Layer.

The most useful language elements have been described: variables, references, resources defaults and ordering, conditionals, and comparison operators. We have taken a look at exported and virtual resources and analyzed the structure of a module. We also learned how to work with ERB templates. Finally, we have seen how Puppet's filebucket works and how to recover files modified by Puppet.

We are now ready to face a very important component of the Puppet ecosystem: Hiera, and see how it can be used to separate our data from Puppet code.