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Extending Puppet - Second Edition by Jaime Soriano Pastor, Alessandro Franceschi

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Summary

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

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

We are ready to face a very important component ...

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