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Salt Cookbook

You're reading from   Salt Cookbook Over 80 hands-on recipes to efficiently configure and manage your infrastructure with Salt

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781784399740
Length 350 pages
Edition 1st Edition
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Author (1):
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Anirban Saha Anirban Saha
Author Profile Icon Anirban Saha
Anirban Saha
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Toc

Table of Contents (13) Chapters Close

Preface 1. Salt Architecture and Components FREE CHAPTER 2. Writing Advanced Salt Configurations 3. Modules, Orchestration, and Scaling Salt 4. General Administration Tasks 5. Advanced Administration Tasks 6. Managing Application Servers 7. Managing Databases 8. Configuring Salt Cloud 9. Managing Amazon Web Services 10. Salt Event and Reactor System 11. Troubleshooting Index

Using grains in states


Grains are one of the most important features of Salt, based on which we can perform the configuration and orchestration tasks efficiently. Salt offers the flexibility to use the default grains and also to add custom grains as and when required. In this recipe, you will learn how to use grains in state configurations.

How to do it...

Configure a new minion with the hostname or minion ID as stgdc1app01 in the staging environment. In this naming convention, stg is the environment, dc1 is the location, app is the server type, and 01 is a numeric identifier for the host.

  1. Run the following command to get a full list of available grains on the minion:

    [root@salt-master ~]# salt 'stgdc1app01' grains.items
    
  2. Next, run the following command to get information about two specific grains that we will work with:

    [root@salt-master ~]# salt 'stgdc1app01' grains.item \ ip_interfaces fqdn
    stgdc1app01:
      fqdn: stgdc1app01
      ip_interfaces: {'lo': ['127.0.0.1'], 'eth1': ['192.168.0.3'], 'eth0...
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