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LEARNING PUPPET

LEARNING PUPPET

By : Jussi Heinonen
3.3 (3)
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LEARNING PUPPET

LEARNING PUPPET

3.3 (3)
By: Jussi Heinonen

Overview of this book

Puppet is a cross-platform, open source configuration management utility, which runs on various Unix, Linux, and Windows Microsoft platforms. It allows you to automate all your IT configurations, giving you control of what you do to each node, and also when and how you do it. You’ll be able to build and manage development, test, and production environments independently without requiring previous system administration experience. Learning Puppet is a step-by-step guide on how to get started with Puppet development and use Puppet modules as the building blocks to deploy production-ready application cluster in virtual environment. You will begin with the installation of development environment on the VirtualBox hypervisor and Puppet Learning VM that will be used as the platform for testing and development of Puppet modules. Next, you will learn how to manage virtual machines and snapshots effectively and enhance the development experience with advanced VirtualBox features. Later the book will focus on Puppet module development in detail. You will be guided through the process of utilizing existing modules that are available in the public module repository, write your own modules and use them to deploy a real-world web application that includes features such as monitoring and load balancing. You will then learn to scale your environment and turn your static configuration into a dynamic one through stored configurations and PuppetDB. Finally, the book will provide you with practical advice on Puppet troubleshooting and managing your environment with the wealth of features provided by the Puppet Enterprise console.
Table of Contents (12 chapters)
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Preface
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Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Puppet Development in Isolation
1. Puppet Development in Isolation
Puppet Manifests
Downloading Oracle VirtualBox
Downloading the Puppet Learning VM
Importing the Puppet Learning VM into VirtualBox
Virtual machine snapshots
Snapshot of the virtual machine
Puppet on command line
Managing resources with the puppet apply command
Creating Puppet manifests
Puppet configuration
Summary
2
2. Managing Packages in Puppet
2. Managing Packages in Puppet
Restoring a snapshot
Introducing VirtualBox Guest Additions
Summary
3
3. My First Puppet Module
3. My First Puppet Module
Introducing the Puppet module
Summary
4
4. Monitoring Your Web Server
4. Monitoring Your Web Server
Monitoring the architecture
Creating a Nagios module for the client and server
Enable monitoring on the web server
Summary
5
5. Load Balancing the Cluster
5. Load Balancing the Cluster
The parameterized class
The defined type
The load balancing architecture
Building the load balancer node
Adding parameters to the loadbalancer class
Load balancing web server nodes
Summary
6
6. Scaling Up the Puppet Environment
6. Scaling Up the Puppet Environment
Puppet Master
Connecting Puppet Agent with Puppet Master
Summary
7
7. Making the Configuration Dynamic
7. Making the Configuration Dynamic
An introduction to PuppetDB and exported resources
Summary
8
8. Extending Puppet
8. Extending Puppet
Puppet functions
Creating custom facts
Summary
9
9. The Puppet Enterprise Console
9. The Puppet Enterprise Console
Role-based Access Control
Creating a node group
Using Live Management
Accessing reports via the Puppet Enterprise Console
Searching nodes with Inventory Search
Summary
10
10. Troubleshooting Puppet
10. Troubleshooting Puppet
Prerequisites
Troubleshooting node definition issues
Diagnosing duplicate declaration errors
Getting around dependency cycle errors
Troubleshooting missing resources
Rectifying certificate errors
Finding help online
Summary
11
Index
Index

What this book covers

Chapter 1, Puppet Development in Isolation, teaches you how to set up the local Puppet development environment quickly and start experimenting with Puppet on the command line in a matter of minutes.

Chapter 2, Managing Packages in Puppet, shows you how to restore the virtual machine snapshot and set up shared folders and host-only networking to enhance the developer's experience. You can also learn how to purge a software package using Puppet.

Chapter 3, My First Puppet Module, explains the concept of Puppet modules. You will learn how to install third-party Puppet modules from Puppet Forge and how to create and use your own modules.

Chapter 4, Monitoring Your Web Server, teaches you how to use Puppet to install the Nagios monitoring server and how to add a web server to monitor using Puppet.

Chapter 5, Load Balancing the Cluster, introduces you to parameterized classes and defined types and teaches you to use these to configure load balancing in the cluster.

Chapter 6, Scaling Up the Puppet Environment, introduces you to the Puppet Master, which enables you to centrally manage a large number of Puppet Agent nodes. You will learn how to sign Puppet Agent certificates and join agents to the Puppet environment.

Chapter 7, Making the Configuration Dynamic, teaches you how to use Puppet's Exported Resources to pass Puppet resources between nodes. This chapter also introduces you to the PuppetDB queries that are used to discover services in the cluster.

Chapter 8, Extending Puppet, teaches you how to extend Puppet beyond its built-in functionality. This chapter introduces you to custom facts and functions.

Chapter 9, The Puppet Enterprise Console, explores the Puppet Enterprise Console, which is a web-based management console that runs on the Puppet Master node. In this chapter, we will learn about Role-based Access Control and how to classify nodes using the External Node Classifier.

Chapter 10, Troubleshooting Puppet, teaches you how to identify the most common issues in Puppet and how to tackle them. This chapter provides you with basic troubleshooting skills.

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