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Mastering SaltStack

You're reading from   Mastering SaltStack Use Salt to the fullest

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Product type Paperback
Published in Nov 2016
Publisher Packt
ISBN-13 9781786467393
Length 378 pages
Edition 2nd Edition
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Author (1):
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Joseph Hall Joseph Hall
Author Profile Icon Joseph Hall
Joseph Hall
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Table of Contents (14) Chapters Close

Preface 1. Essentials Revisited FREE CHAPTER 2. Diving into Salt Internals 3. Managing States 4. Exploring Salt SSH 5. Managing Tasks Asynchronously 6. Taking Advantage of Salt Information Systems 7. Taking Salt Cloud to the Next Level 8. Using Salt with REST 9. Understanding the RAET and TCP Transports 10. Strategies for Scaling 11. Monitoring with Salt 12. Exploring Best Practices 13. Troubleshooting Problems

Using monitoring states

Monitoring states are one of the less commonly known pieces of functionality inside Salt, and that's a shame. While execution modules are superb for building and maintaining a baseline of information about a machine, monitoring states are designed to raise a notification when a metric falls out of the desired range.

Note

The notification in this case is not the same as an alert. It can be used to raise alerts, but it is an independent action.

As you may recall, there are four pieces of information that will always be returned from each individual state:

  • Name
  • Result
  • Changes
  • Comment

Monitoring states differ from standard states in three ways. First of all, they are not allowed to make changes to the system. Their job is to observe and report. Secondly, they return a fifth piece of information:

  • Data

This contains a dictionary of data that was retrieved by the monitoring state. This could be a metric involving disk usage, a particular CPU load average, or even the contents...

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