[sheepdog-users] Problem with qcow2

[Vasiliy Tolstov]

2016-09-29 10:20 GMT+03:00 Cristian Del Carlo
<cristian.delcarlo at targetsolutions.it>:
> Hi Hitoshi,
>
> Thanks for your response and for your time.
> Correct me if I'm wrong.
>
> I thought about using qcow2 to use qemu to have the ability to use internal
> shapshot.
>
> To have a consistent image of my virtual machines using sheepdog, I think I
> should turn off the virtual machine, then make the snapshot ( dog vdi
> snapshot -s ) and then turn it on again.
>
> Using internal snapshot feature of qcow2/qemu I could avoid switching off
> the machine.
>
> External snapshot do not seem to be supported with sheepdog:
>
> # virsh snapshot-create-as test3 test3-backup --disk-only --atomic
>
> error: unsupported configuration: source for disk 'vda' is not a regular
> file; refusing to generate external snapshot name
>
> I'm thinking correctly or i am wrong?
>
> Thanks,


You don't need qcow2 for snapshoting in sheepdog. Sheepdog able to
save all state of vm.
Create internal snapshot. I remember that libvirt have some bugs about
snapshots in sheepdog, but if you have reproduced issue i can fix ti.

-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru