Book Image

Puppet 5 Essentials - Third Edition

By : Martin Alfke, Felix Frank
Book Image

Puppet 5 Essentials - Third Edition

By: Martin Alfke, Felix Frank

Overview of this book

Puppet is a configuration management tool that allows you to automate all your IT configurations, giving you control over what you do to each Puppet Agent in a network, and when and how you do it. In this age of digital delivery and ubiquitous Internet presence, it's becoming increasingly important to implement scaleable and portable solutions, not only in terms of software, but also the system that runs it. This book gets you started quickly with Puppet and its tools in the right way. It highlights improvements in Puppet and provides solutions for upgrading. It starts with a quick introduction to Puppet in order to quickly get your IT automation platform in place. Then you learn about the Puppet Agent and its installation and configuration along with Puppet Server and its scaling options. The book adopts an innovative structure and approach, and Puppet is explained with flexible use cases that empower you to manage complex infrastructures easily. Finally, the book will take readers through Puppet and its companion tools such as Facter, Hiera, and R10k and how to make use of tool chains.
Table of Contents (10 chapters)

The Puppet server

Many Puppet-based workflows are centered on the server, which is the central source of configuration data and authority. The server hands instructions to all the computer systems in the infrastructure (where agents are installed). It serves multiple purposes in the distributed system of Puppet components.

The server will perform the following tasks:

  • Storing manifests and compiling catalogs
  • Serving as the SSL certification authority
  • Processing reports from the agent machines
  • Gathering and storing information about the agents

As such, the security of your server machine is paramount. The requirements for hardening are comparable to those of a Kerberos key distribution center.

During its first initialization, the Puppet server generates the CA certificate. This self-signed certificate will be distributed among and trusted by all the components of your infrastructure...