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Extending Puppet

By : Alessandro Franceschi
Book Image

Extending Puppet

By: Alessandro Franceschi

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Extending Puppet
Alessandro Franceschi
Jun, 2014 | 328 pages
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Table of Contents (21 chapters)
Extending Puppet
Extending Puppet
Credits
Credits
Foreword
Foreword
About the Author
About the Author
Acknowledgments
Acknowledgments
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Puppet Essentials
Puppet Essentials
The Puppet ecosystem
Puppet components
Installation and configuration
Puppet in action
Summary
2
Hiera
Hiera
Installing and configuring Hiera
Working with the command line on a YAML backend
Using Hiera in Puppet
Additional Hiera backends
Using Hiera as an ENC
Summary
3
PuppetDB
PuppetDB
Installation and configuration
Dashboards
The PuppetDB API
Querying PuppetDB for fun and profit
The puppetdbquery module
How Puppet code may change in the future
Summary
4
Designing Puppet Architectures
Designing Puppet Architectures
The components of Puppet architecture
The Foreman
Roles and profiles
The data and the code
Sample architectures
Summary
5
Using and Writing Reusable Modules
Using and Writing Reusable Modules
The evolution of modules' layouts
The parameters dilemma
Reusability patterns
Summary
6
Higher Abstraction Modules
Higher Abstraction Modules
Understanding the need for higher abstractions
The OpenStack example
An approach to reusable stack modules
Summary
7
Deploying and Migrating Puppet
Deploying and Migrating Puppet
Examining the potential scenarios and approaches
Patterns for extending Puppet coverage
Things change
Summary
8
Code Workflow Management
Code Workflow Management
Writing the Puppet code
Git workflows
Code review
Testing the Puppet code
Deploying the Puppet code
Propagating Puppet changes
Puppet Continuous Integration tools
Summary
9
Scaling Puppet Infrastructures
Scaling Puppet Infrastructures
Scaling Puppet
Scaling stored configs
Measuring performance
Summary
10
Writing Puppet Plugins
Writing Puppet Plugins
Anatomy of a Puppet run, under the hood
Custom report handlers
Custom faces
Summary
11
Beyond the System
Beyond the System
Puppet on a network equipment
Puppet for cloud and virtualization
Puppet on storage devices
Summary
12
Future Puppet
Future Puppet
Introducing the future parser
Other new features
Improved error system
Data in modules
Facter 2
Trapperkeeper
Summary
Index
Index

Deploying the Puppet code

Deployment of the Puppet code is, most times, a matter of updating modules, manifests, and Hiera data on the relevant directories of the Puppet Master.

We deal with two logically different kinds of code that involve different management patterns, which are:

  • Our modules, manifests, and data

  • The public modules we are using

We can manage them in various ways. Some of them are:

  • Eventually using Git submodules for each Puppet module in Git

  • Using the puppet module command for the public modules published on the Forge

  • Using tools such as librarian-puppet and r10k

  • Using other tools or custom procedures that we may write specifically for our needs

Using librarian-puppet for deployments

The librarian-puppet tool (http://librarian-puppet.com) was developed to manage the installation of a set of modules from the Puppet Forge or any Git repository. It is based on Puppetfile, where the modules and the versions to install are defined:

forge "http://forge.puppetlabs.com"

# Install a module...
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