Book Image

Mastering KVM Virtualization

Book Image

Mastering KVM Virtualization

Overview of this book

A robust datacenter is essential for any organization – but you don’t want to waste resources. With KVM you can virtualize your datacenter, transforming a Linux operating system into a powerful hypervisor that allows you to manage multiple OS with minimal fuss. This book doesn’t just show you how to virtualize with KVM – it shows you how to do it well. Written to make you an expert on KVM, you’ll learn to manage the three essential pillars of scalability, performance and security – as well as some useful integrations with cloud services such as OpenStack. From the fundamentals of setting up a standalone KVM virtualization platform, and the best tools to harness it effectively, including virt-manager, and kimchi-project, everything you do is built around making KVM work for you in the real-world, helping you to interact and customize it as you need it. With further guidance on performance optimization for Microsoft Windows and RHEL virtual machines, as well as proven strategies for backup and disaster recovery, you’ll can be confident that your virtualized data center is working for your organization – not hampering it. Finally, the book will empower you to unlock the full potential of cloud through KVM. Migrating your physical machines to the cloud can be challenging, but once you’ve mastered KVM, it’s a little easie.
Table of Contents (22 chapters)
Mastering KVM Virtualization
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Shared storage


We start this by setting up a shared storage. In this example, we are using NFS as the shared storage. We use NFS because it is simple to set up, thus helping you to follow the migration examples easily. In actual production, it is recommended to use ISCSI-based or FC-based storage pools. NFS is not a good choice when the files are large and the VM performs heavy I/O operations. Gluster is a good alternative to NFS and we would say that you should try it. Gluster is well integrated in LIbvirt. You can re-visit Chapter 5, Network and Storage, to know how to create a storage pool using ISCSI or FC.

We created the following NFS share on a Fedora 22 server. The name of the server is nfs-01.

Exporting directory /testvms from nfs-01:

# echo '/testvms *(rw,sync,no_root_squash)' >> /etc/export

Allow the NFS service in firewall:

# firewall-cmd --get-active-zones
FedoraServer
  interfaces: eth0
# firewall-cmd --zone=FedoraServer --add-service=nfs
# firewall-cmd --zone=FedoraServer...