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Mastering Puppet

Mastering Puppet

By : Thomas Uphill
3.9 (13)
Buy this Book
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Mastering Puppet

Mastering Puppet

3.9 (13)
By: Thomas Uphill
Buy this Book

Overview of this book

Presented in an easy-to-follow, step-by-step tutorial format and packed with examples, this book will lead you through making the best out of Puppet in an enterprise environment. If you are a system administrator or developer who has used Puppet in production and are looking for ways to easily use Puppet in an enterprise environment, this book is for you. This book assumes an intermediate knowledge of Puppet and is intended for those writing modules or deploying Puppet in an enterprise environment.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Dealing with Load/Scale
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1. Dealing with Load/Scale
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Divide and conquer
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Conquer by dividing
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Summary
2
2. Organizing Your Nodes and Data
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2. Organizing Your Nodes and Data
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Getting started
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Organizing the nodes with ENC
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Hiera
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Summary
3
3. Git and Environments
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3. Git and Environments
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Environments
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Git
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Git for everyone
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Summary
4
4. Public Modules
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4. Public Modules
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Getting modules
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Using GitHub for public modules
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Modules from the Forge
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Using librarian
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Using r10k
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Using modules
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Summary
5
5. Custom Facts and Modules
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5. Custom Facts and Modules
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Module manifest files
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Custom facts
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Summary
6
6. Custom Types
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6. Custom Types
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Parameterized classes
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Defined types
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Types and providers
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Summary
7
7. Reporting and Orchestration
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7. Reporting and Orchestration
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Turning on reporting
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Syslog
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Store
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IRC
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Foreman
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Puppet Dashboard
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Summary
8
8. Exported Resources
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8. Exported Resources
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Configuring puppetdb – using the forge module
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Manually installing puppetdb
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Exported resource concepts
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Simple example: a host entry
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Resource tags
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Putting it all together
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Summary
9
9. Roles and Profiles
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9. Roles and Profiles
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Design pattern
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Creating an example CDN role
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Dealing with exceptions
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Summary
10
10. Troubleshooting
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10. Troubleshooting
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Connectivity issues
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Catalog failures
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Debugging
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Summary
11
Index
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Index

Catalog failures

When the client requests a catalog, it is compiled on the master and sent down to the client. If the catalog fails to compile, the error is printed and can most likely be corrected easily. For example, the following base class has an obvious error:

class base {
  file {'one':
    path   => '/tmp/one',
    ensure => 'directory',
  }
  file {'one':
    path   => '/tmp/one',
    ensure => 'file',
  }
}

The file resource is defined twice with the same name. When we run Puppet, the error appears as shown in the following screenshot:

Catalog failures

The duplicate declaration error is shown following Error 400 on SERVER.

HTTP 400 errors indicate that the request sent to the web server (Puppet server in this case) was malformed. In this case, the Puppet server are letting the client know that there was a problem with the request to compile a catalog. The previous versions of Puppet did not return error codes as useful as those...

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