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Mastering Puppet

Mastering Puppet

By : Thomas Uphill
3.9 (13)
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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

Creating an example CDN role

We will start by constructing a module for a web server (the cliché example). What though, is a web server? Is a web server an Apache server or a Tomcat server or both, or maybe even nginx? What filesystems are required? What firewall rules should always be applied? The design problem is figuring out what the commonalities are going to be and where to divide. In most enterprises, creating a blanket "web server" module won't solve any problems and will potentially generate huge case statements. If your modules follow the roles-and-profiles design pattern, you shouldn't need huge case statements keyed off $::hostname; nodes shouldn't be mentioned in your role module. To illustrate this point, we'll look at an example for our companies' Content Delivery Network (CDN) implementation. Nodes in the CDN will be running nginx.

Tip

The use of nginx for a CDN is only given as an example. This in no way constitutes an endorsement of nginx for this purpose.

We'll create an...

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Mastering Puppet
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