Book Image

OpenNebula 3 Cloud Computing

Book Image

OpenNebula 3 Cloud Computing

Overview of this book

OpenNebula is one of the most advanced and highly-scalable open source cloud computing toolkits. If you ever wanted to understand what Cloud Computing is and how to realize it, or if you need a handy way to manage your messy infrastructure in a simple and coherent manner, this is your way. OpenNebula 3 Cloud Computing guides you along the building and maintenance of your cloud infrastructure, providing real-world examples, step-by-step configuration and other critical information. The book keeps you a step ahead in dealing with the demanding nature of cloud computing and virtual infrastructure management using one of the most advanced cloud computing toolkitsñ OpenNebula. The book takes you from a basic knowledge of OpenNebula to expert understanding of the most advanced features.The book starts with a basic planning of hardware resources and presents the unique benefits of the supported hypervisors; you will go in deep with day-to-day management of virtual instances, infrastructure monitoring and integration with Public Clouds like Amazon EC2.With this book you will be able to get started with fast and cheap configuration recipes, but also go deeper for a correct integration with your existing infrastructure.You will deal with well-know virtualization technologies like Xen and VMware, but also with the promising KVM technology integrated in the Linux kernel. After the basic infrastructure set-up, you will learn how to create and manage virtual instance via both command-line and web interfaces, and how to monitor your existing resources.At the end, the book acquaints you with integrating your local infrastructure with external Cloud resources but also publishing your resources to others via common API interfaces.
Table of Contents (17 chapters)
OpenNebula 3 Cloud Computing
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
1
OpenNebula and Why it Matters?
Index

KVM installation


KVM is currently the easiest hypervisor to configure. The core module is included in the mainline Linux kernel and most distributions enable it in the generic kernels. It runs on hosts that support hardware virtualization and can virtualize almost all operating systems (http://www.linux-kvm.org/page/Guest_Support_Status). It is the recommended choice if you do not have experience with any other virtualization technologies.

For installing a KVM host for OpenNebula, you need to install and configure a base system plus some packages as follows:

  • A kernel with kvm-intel or kvm-amd module

  • A libvirt daemon

  • A Ruby interpreter

  • The qemu-kvm package

In order to check that your current kernel has the needed modules available, try to load it using the following command:

$ sudo modprobe kvm-intel

If you are running an AMD CPU, use the following command:

$ sudo modprobe kvm-amd

The command should not return any message. To double-check if the module has been correctly loaded, issue the following...