On Fri, Jul 9, 2021 at 1:03 AM Alex K wrote:
>
>
> On Thu, Jul 8, 2021, 20:19 wrote:
>
>> Hello,
>> I am trying to export a bunch o VM from oVirt version 3.5
>> The problem is that there is no OVA support for exporting them. I also
>> tryed to export VMs into OVA format using ovirtsdk4 which anyway won't work
>> on oVirt 3.5.
>> I can successfully export to a NFS partition but for each VM there are
>> several qcow v2 files which I suppose to be the VM image and its snapshots.
>> How to identify the correct file to represent the current VM status ?
>>
> When exporting you should get only one image file with the current status
> of the vm.
>
> If you want to hack with the vm images, you can commit all the chain of
> the snapshot files to your own single qcow2 copy using qemu-img commands.
>
>> You can easily get the disk ID of the current active snapshot (vm ->
> snapshots) then you can view the full chain with:
> qemu-img info --backing-chain $FILENAME
> You need to know what you are doing though to avoid any data loss.
>
> If I delete all the snapshots, will I end up with only one valid qcow v2
>> image that I can use ?
>>
> Yes, you should. You can try if the snapshots are not needed.
>
You can alternatively ask to discard (collapse) snapshots during export in
order to get a single volume on the export domain [0]
There's an example for how to do that in the latest documentation of the
API [1]
This option seems to exist also in the API of oVirt 3.5 [2]
[0] It will not necessarily be a qcow2 volume - that depends on the format
of the base volume of the VM you export
[1]
https://github.com/oVirt/ovirt-engine-api-model/blob/4.4.31/src/main/java/services/VmService.java#L174-L189
[2]
https://github.com/oVirt/ovirt-engine/blob/ovirt-engine-3.5/backend/manager/modules/restapi/jaxrs/src/main/java/org/ovirt/engine/api/restapi/resource/BackendVmResource.java#L432-L434
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