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

Non-shared storage through SSH/CP


Without shared storage between frontend and hosts when a VM is deployed OpenNebula copies the image files from the Image Repository to the folder specified as VM_DIR in the oned.conf on the remote host.

For this reason, make sure that you can connect remotely through SSH without providing any password from the frontend to every host (instructions on how to set up passwordless SSH login was given in the previous chapter).

When creating a new host, you should use the onehost command with tm_ssh as the third parameter, as shown in the following command:

onehost create host01 im_hypervisor vmm_hypervisor tm_ssh dummy

Tip

Non-shared storage: common use cases

Without a shared filesystem you cannot achieve real high availability. If a node goes down because of a physical failure (for example, power supply or disk controller) the virtual instances that were running on it cannot be directly restarted on another host. It requires a fresh redeployment from the original...