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KVM Virtualization Cookbook

You're reading from   KVM Virtualization Cookbook Learn how to use KVM effectively in production

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781788294676
Length 340 pages
Edition 1st Edition
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Author (1):
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Konstantin Ivanov Konstantin Ivanov
Author Profile Icon Konstantin Ivanov
Konstantin Ivanov
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Table of Contents (9) Chapters Close

Preface 1. Getting Started with QEMU and KVM FREE CHAPTER 2. Using libvirt to Manage KVM 3. KVM Networking with libvirt 4. Migrating KVM Instances 5. Monitoring and Backup of KVM Virtual Machines 6. Deploying KVM Instances with OpenStack 7. Using Python to Build and Manage KVM Instances 8. Kernel Tuning for KVM Performance

Online migration using the virsh command with shared storage

The virsh command provides a migrate parameter that we can use to migrate KVM instances between hosts. In the previous two recipes, we saw how to migrate instances manually with downtime. In this recipe, we are going to perform a live migration on an instance that uses either the iSCSI storage pool or the GlusterFS shared volumes that we used earlier in this chapter.

If you recall, live migration only works when the guest filesystem resides on some sort of shared media, such as NFS, iSCSI, GlusterFS, or if we first copy the image file to all nodes and use the --copy-storage-all option with virsh migrate, as we'll see later in this chapter.

Getting ready

In order...

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