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Mastering Puppet 5

You're reading from   Mastering Puppet 5 Optimize enterprise-grade environment performance with Puppet

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Product type Paperback
Published in Sep 2018
Publisher Packt
ISBN-13 9781788831864
Length 292 pages
Edition 1st Edition
Tools
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Authors (2):
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Jason Southgate Jason Southgate
Author Profile Icon Jason Southgate
Jason Southgate
Ryan Russell-Yates Ryan Russell-Yates
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Ryan Russell-Yates
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Table of Contents (14) Chapters Close

Preface 1. Authoring Modules FREE CHAPTER 2. Roles and Profiles 3. Extending Puppet 4. Hiera 5 5. Managing Code 6. Workflow 7. Continuous Integration 8. Extending Puppet with Tasks and Discovery 9. Exported Resources 10. Application Orchestration 11. Scaling Puppet 12. Troubleshooting and Profiling 13. Other Books You May Enjoy

Application definition


Application definitions look a lot like a defined resource, but are also similar to a traditional Puppet profile. They describe a collection of components that make an entire system, but unlike profiles, are not tied down to a single node. These application definitions describe a configured state of one or more nodes, broken down by application components. 

 

 

Application definitions will resemble defined types, with a few key differences:

  • They are titled application instead of define.
  • Each resource must be name spaced within the module:
# Application used instead of 'class' or 'define'
application 'example' (
  $var,
) {

# app1 exports its database configuration items
  example::app1 {
    config => $var,
    export => Database['app1'],
  }

# app2 both imports the previous database and exports its own type: Application
  example::app2 {
    config  => $var,
    consume => Database['app1'],
    export  => Application['app1'],
  }

What is important to note...

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