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libvirt-migrate-qemu-disks - program for migrating pre-0.8.3 domain definitions


Libvirt versions earlier that 0.8.3 would probe a qemu disk to determine its format and
did not require that the format be declared in the XML. Newer versions of libvirt will
default to the 'raw' format when the format is not specified in the XML. As a result, non-
raw disks without unspecified disk format will no longer be available in virtual machines.

libvirt-migrate-qemu-disks aids in transitioning virtual machine definitions to the new
required format. In essence, it will check all domains for affected virtual machines,
probe the affected disks and update the domain definition accordingly. For example, a
domain with:

<disk type='file' device='disk'>
<source file='/var/lib/libvirt/images/vm1.qcow2'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' unit='0'/>

will be updated to have:

<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/vm1.qcow2'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' unit='0'/>


libvirt-migrate-qemu-disks [-c URI] [-d] -a

libvirt-migrate-qemu-disks [-c URI] [-d] -t TYPE <DOMAIN>


-h, --help
show help message and exit

-a probe all domains and migrate if necessary

-c URI connection URI to use. If one is not specified, will use qemu:///system. Only
qemu:///system and qemu:///session is supported.

migrate specified domains from raw to disk format TYPE

-d debug output


To probe and migrate all exisiting domains (root may be needed to probe the disk):

# libvirt-migrate-qemu-disks -a

To migrate the 'vm1' and 'vm2' domains:

# libvirt-migrate-qemu-disks -t qcow2 vm1 vm2

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