Book Image

LEARNING PUPPET

By : Jussi Heinonen
Book Image

LEARNING PUPPET

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)
11
Index

Snapshot of the virtual machine

Before we start the virtual machine, we should take a snapshot of it so that we can quickly revert to the point of time where we started.

To take a snapshot of the virtual machine and name it, follow the given steps:

  1. First, select the virtual machine, then click on the Snapshots button at the top right-hand corner of the Oracle VM VirtualBox Manager window:
    Snapshot of the virtual machine
  2. In the Snapshots view, click on the Take snapshot button:
    Snapshot of the virtual machine
  3. Provide a name for the snapshot, I have named it Base image. Then, click on OK:
    Snapshot of the virtual machine

Now, we have a snapshot that enables us to go back to the previous state of the VM as we make changes to the system configuration.