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
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Monitoring KVM instances with Sensu


Sensu is a complete monitoring solution that uses the client-server model; the server publishes checks in a message queue provided by the Rabbitmq service. The clients/agents subscribe to topics in the queue and execute the specified checks on the host they run on. State and historical data is stored in a Redis server.

In this recipe, we are going to install the Sensu server, Rabbitmq message queue, and the Redis server on one host, write a simple monitoring check using the information we obtained from the Resource usage collection with libvirt recipe earlier, and install the Sensu agent inside the KVM guest.

Getting ready

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

  • A Linux host with libvirt installed and running
  • A KVM instance running on the libvirt host
  • Network connectivity between the KVM instance and the libvirt host

How to do it...

To set up a new Sensu deployment and define various monitoring checks, perform the following steps:

  1. Install the Redis...