Book Image

Mastering KVM Virtualization - Second Edition

By : Vedran Dakic, Humble Devassy Chirammal, Prasad Mukhedkar, Anil Vettathu
Book Image

Mastering KVM Virtualization - Second Edition

By: Vedran Dakic, Humble Devassy Chirammal, Prasad Mukhedkar, Anil Vettathu

Overview of this book

Kernel-based Virtual Machine (KVM) enables you to virtualize your data center by transforming your Linux operating system into a powerful hypervisor that allows you to manage multiple operating systems with minimal fuss. With this book, you'll gain insights into configuring, troubleshooting, and fixing bugs in KVM virtualization and related software. This second edition of Mastering KVM Virtualization is updated to cover the latest developments in the core KVM components - libvirt and QEMU. Starting with the basics of Linux virtualization, you'll explore VM lifecycle management and migration techniques. You’ll then learn how to use SPICE and VNC protocols while creating VMs and discover best practices for using snapshots. As you progress, you'll integrate third-party tools with Ansible for automation and orchestration. You’ll also learn to scale out and monitor your environments, and will cover oVirt, OpenStack, Eucalyptus, AWS, and ELK stack. Throughout the book, you’ll find out more about tools such as Cloud-Init and Cloudbase-Init. Finally, you'll be taken through the performance tuning and troubleshooting guidelines for KVM-based virtual machines and a hypervisor. By the end of this book, you'll be well-versed with KVM virtualization and the tools and technologies needed to build and manage diverse virtualization environments.
Table of Contents (22 chapters)
Section 1: KVM Virtualization Basics
Section 2: libvirt and ovirt for Virtual Machine Management
Section 3: Automation, Customization, and Orchestration for KVM VMs
Section 4: Scalability, Monitoring, Performance Tuning, and Troubleshooting

Customizing Windows VMs using cloudbase-init

If you had the chance to go through Chapter 9, Customizing a Virtual Machine with cloud-init, we discussed a tool called cloud-init. What we used it for was guest operating system customization, specifically for Linux machines. cloud-init is heavily used in Linux-based environments, specifically in Linux-based clouds, to perform initialization and configuration of cloud VMs.

The idea behind cloudbase-init is the same, but it's aimed at Windows guest operating systems. Its base services start up when we boot a Windows guest operating system instance, as well as read through the configuration information and configure/initialize it. We are going to show a couple of examples of cloudbase-init operations a bit later in this chapter.

What can cloudbase-init do? The list of features is quite long, as cloudbase-init has a modular approach at its core, so it offers many plugins and interpreters, which can be used to further its reach...