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

Building hybrid KVM clouds with Eucalyptus

Eucalyptus is a strange beast, and by that, we do not mean the plant. Created as a project to bridge the gap between private cloud services and AWS, Eucalyptus tries to recreate almost all AWS functionalities in a local environment. Running it is almost like having a small local cloud that is compatible with AWS, and that in turn uses almost the same commands as AWS. It even uses the same names for things as AWS does, so it works with buckets and all of that. This is on purpose, and with consent from Amazon. Having an environment like this is a great thing for everybody since it creates a safe space for developers and companies to deploy and test their instances.

Eucalyptus consists of several parts:

Figure 13.34 – Eucalyptus architecture (, official documentation)

As can be seen from the diagram, Eucalyptus is highly scalable.

An availability zone is one segment that can hold...