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

Using salt-call locally

Very often, it is helpful to issue commands directly on the minion without involving the master, or at least minimizing communication with the master. The salt-call command can be used with or without the local mode:

# salt-call
# salt-call --local

The difference between these two commands is that the first will still contact the master to ask for data such as pillar data, files from the master file server (if needed), and so on. The second will tell the minion to behave as if it has no master, and look for that information locally. If data has been set up in file_roots or pillar_roots directly on the minion, it will be used instead of contacting the master:

# salt-call mytest.badcode 
[ERROR   ] An un-handled exception was caught by salt's global exception handler: 
NameError: global name 'die' is not defined 
Traceback (most recent call last): 
  File "/usr/bin/salt-call", line 11, in <module> 
    salt_call() ...