Book Image

KVM Virtualization Cookbook

By : Konstantin Ivanov
Book Image

KVM Virtualization Cookbook

By: Konstantin Ivanov

Overview of this book

Virtualization technologies such as KVM allow for better control over the available server resources, by deploying multiple virtual instances on the same physical host, or clusters of compute resources. With KVM it is possible to run various workloads in isolation with the hypervisor layer providing better tenant isolation and higher degree of security. This book will provide a deep dive into deploying KVM virtual machines using qemu and libvirt and will demonstrate practical examples on how to run, scale, monitor, migrate and backup such instances. You will also discover real production ready recipes on deploying KVM instances with OpenStack and how to programatically manage the life cycle of KVM virtual machines using Python. You will learn numerous tips and techniques which will help you deploy & plan the KVM infrastructure. Next, you will be introduced to the working of libvirt libraries and the iPython development environment. Finally, you will be able to tune your Linux kernel for high throughput and better performance. By the end of this book, you will gain all the knowledge needed to be an expert in working with the KVM virtualization infrastructure.
Table of Contents (15 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Terminating KVM instances with OpenStack

In this recipe, we are going to terminate a KVM instance provisioned with OpenStack. Terminating the instance will undefine it through libvirt, release the allocated CPU memory and disk resources back to the pool of available resource, for the compute host, and mark its IP address as available in the Neutron database.

Getting ready

For this recipe, we are going to need the following:

  • A database server, a message queue, andmemcachedinstalled and configured, as described in thePreparing the host for the OpenStack deploymentrecipe.
  • The Glance service with an available image. For more information on how to deploy Glance and add a new image, refer to theInstalling and configuring the OpenStack Glance image servicerecipe.
  • The Keystone service we deployed in theInstalling and configuring the OpenStack Keystone identity servicerecipe.
  • The Nova services we configured in theInstalling and configuring the OpenStack Nova compute servicerecipe.
  • The Neutron service that...