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Extending SaltStack

You're reading from   Extending SaltStack Build and write salt modules

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Product type Paperback
Published in Mar 2016
Publisher Packt
ISBN-13 9781785888618
Length 240 pages
Edition 1st Edition
Languages
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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 (15) Chapters Close

Preface 1. Starting with the Basics FREE CHAPTER 2. Writing Execution Modules 3. Extending Salt Configuration 4. Wrapping States Around Execution Modules 5. Rendering Data 6. Handling Return Data 7. Scripting with Runners 8. Adding External File Servers 9. Connecting to the Cloud 10. Monitoring with Beacons 11. Extending the Master A. Connecting Different Modules B. Contributing Code Upstream Index

Listening to event data


Every time a message is published to the queue, an event is also fired along Salt's event bus. You can use the state.event runner to listen to the event bus and display those messages in real time.

Make sure you have the salt-master service running, and the salt-minion service on at least one machine connected to it. On the Master, run the following command:

# salt-run state.event

In another terminal, issue a command to one or more Minions:

# salt '*' test.ping

In the terminal that is running the event listener, you will see the job go out to the Minions:

Event fired at Sun Dec 20 12:04:15 2015
*************************
Tag: 20151220120415357444
Data:
{'_stamp': '2015-12-20T19:04:15.387417',
 'minions': ['trotter',
             'achatz']}

The information contained in this event is no more than a timestamp indicating when the job was created, and a list of Minions that the specified target (in our example, all of them) are expected to execute the job and return data...

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