Online migration using the virsh command and local image

In this recipe, we are going to live migrate a running instance, without shared storage.

Getting ready

For this recipe, we are going to need the following:

• Two libvirt servers with a running KVM instance using a local image file. We are going to use the KVM guest we built in the previous recipe, Offline migration using the virsh command and local image.
• Both servers must be able to communicate with each other using their hostnames.

How to do it...

To migrate an instance without shared storage, use the following steps:

1. Ensure that the KVM guest is running:

root@kvm1:~# virsh list --all
 Id   Name              State
----------------------------------------------------
 33   kvm_no_sharedfs   running

root@kvm1:~#

2. Find the location of the image file:

root@kvm1:~# virsh dumpxml kvm_no_sharedfs | grep "source file"
 <source file='/tmp/kvm_no_sharedfs.img'/>
root@kvm1:~#

3. Transfer the image file to the destination host:

root@kvm1:~# scp /tmp/kvm_no_sharedfs...