Book Image

Mastering SaltStack - Second Edition

By : Joseph Hall
Book Image

Mastering SaltStack - Second Edition

By: Joseph Hall

Overview of this book

SaltStack is a powerful configuration management and automation suite designed to manage servers and tens of thousands of nodes. This book showcases Salt as a very powerful automation framework. We will review the fundamental concepts to get you in the right frame of mind, and then explore Salt in much greater depth. You will explore Salt SSH as a powerful tool and take Salt Cloud to the next level. Next, you’ll master using Salt services with ease in your infrastructure. You will discover methods and strategies to scale your infrastructure properly. You will also learn how to use Salt as a powerful monitoring tool. By the end of this book, you will have learned troubleshooting tips and best practices to make the entire process of using Salt pain-free and easy.
Table of Contents (20 chapters)
Mastering SaltStack Second Edition
About the Author
About the Reviewer

Understanding pillar_roots

In the early days, pillars didn't exist in Salt. Grains were originally introduced as a mechanism for minions to gather system information. That data was useful to execution modules, and it wasn't long before custom grains were also introduced.

The problem with grains is that they need to be configured directly on minions. While the grains execution module does allow easy remote editing of those files, it is often easier and more appropriate to configure data for those minions in a centralized location, such as the master.

As you know, pillars are normally stored in the /srv/pillar/ directory on the master, in static YAML files. However, those files don't need to be static.

Templating pillar_roots

By pillar_roots, we mean the directory that is used as the root directory for pillar files. This setting is configured in the master configuration file. By default, it is set to the following:

    - /srv/pillar/ 
    - /srv/spm/pillar/ 

The second entry...