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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
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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
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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
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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
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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
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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

Organizing the nodes with ENC

An ENC is a script that is run on the Puppet master, or the host compiling the catalog, to determine which classes are applied to the node. The ENC script can be written in any language, and it receives as a command-line argument certname (certificate name) from the node. In most cases, this will be the Fully Qualified Domain Name (FQDN) of the node; we will assume that the certname setting has not been explicitly set and that the FQDN of our nodes is being used.

Tip

We will only use the hostname portion as the FQDN can be unreliable in some instances. Across your enterprise, the naming convention of the host should not allow for multiple machines to have the same hostname. The FQDN is determined by a fact; this fact is the union of the hostname fact and the domain fact. The domain fact on Linux is determined by running the command hostname -f. If DNS is not configured correctly or reverse records do not exist, the domain fact will not be set and the FQDN will...

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