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

Shared storage through NFS on the frontend


A typical and simple setup consists of installing and configuring an NFS server on the frontend. After this, mount a common directory on every host as configured by the VM_DIR parameter in oned.conf, or directly at /var/lib/one or $ONE_LOCATION/var (which is the default location of VM_DIR).

In order to install the NFS server on the frontend use the following command:

$ sudo apt-get install nfs-kernel-server

Also configure the /etc/exports file using the following code:

/var/lib/one 
  192.168.66.0/24(rw,async,no_subtree_check,no_root_squash)

Now take a look at the options that are used. They are as follows:

  • rw: This is used by the clients to read and write on the storage.

  • async: This is used to yield better performance at the cost of possible data corruption if the server reboots while keeping unwritten data and/or metadata in its caches. As our files will be disk images that probably contain a journaled filesystem, we should not worry too much. Use...