On Thu, Jun 11, 2020 at 05:45:46PM +0200, Paul van der Vlis wrote:
> Hello,
>
> I am looking for a way to migrate a VM live to another location.
>
> The qcow2 images are now on /data , but I want to move some of them to a
> volume mounted on /data2 what's faster.
>
> Is this possible without downtime?
Yes, you don't need to use live migration for this even.
The "blockcopy" command can be used to copy contents of a VMs current
disk into a new file. If you use the "--pivot" arg, then QEMU will
switch to using the new file too.
eg something like this:
$ virsh blockcopy rhel8x86_64 --transient-job --pivot \
--path /var/lib/libvirt/images/orig.img \
--dest /var/lib/libvirt/images/new.img
If the file doesn't already exist, libvirt will create it. Having
said that I'm not sure if it preserves format. So might need to
pre-create files if you're using qcow2. Test it on a throw-away
guest disk first ...
Regards,
Daniel
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