Book Image

LEARNING PUPPET

By : Jussi Heinonen
Book Image

LEARNING PUPPET

By: Jussi Heinonen

Overview of this book

Puppet is a cross-platform, open source configuration management utility, which runs on various Unix, Linux, and Windows Microsoft platforms. It allows you to automate all your IT configurations, giving you control of what you do to each node, and also when and how you do it. You’ll be able to build and manage development, test, and production environments independently without requiring previous system administration experience. Learning Puppet is a step-by-step guide on how to get started with Puppet development and use Puppet modules as the building blocks to deploy production-ready application cluster in virtual environment. You will begin with the installation of development environment on the VirtualBox hypervisor and Puppet Learning VM that will be used as the platform for testing and development of Puppet modules. Next, you will learn how to manage virtual machines and snapshots effectively and enhance the development experience with advanced VirtualBox features. Later the book will focus on Puppet module development in detail. You will be guided through the process of utilizing existing modules that are available in the public module repository, write your own modules and use them to deploy a real-world web application that includes features such as monitoring and load balancing. You will then learn to scale your environment and turn your static configuration into a dynamic one through stored configurations and PuppetDB. Finally, the book will provide you with practical advice on Puppet troubleshooting and managing your environment with the wealth of features provided by the Puppet Enterprise console.
Table of Contents (12 chapters)
11
Index

Summary


We have just completed the tenth and final chapter of this book. This chapter focused on the most common issues that I, and the people I work with, regularly encounter with Puppet. We learned how to identify and rectify the node definition issues. We also looked at how to work around duplicate declaration and dependency cycle errors as well as what to do when Puppet reports resources are not found. Finally, we created a Puppet Agent certificate problem and learned how to fix it by regenerating the certificate signing request.

I hope you enjoyed this final chapter as well as the overall book.

Thanks!