On Wed, Dec 14, 2022 at 5:54 PM Nathanaël Blanchet <[email protected]> wrote:

>
> Le 14/12/2022 à 16:42, Arik Hadas a écrit :
>
>
>
> On Wed, Dec 14, 2022 at 5:26 PM Nathanaël Blanchet via Users <
> [email protected]> wrote:
>
>> Hello,
>>
>> I am used to create new vm with ovirt_vm module.
>>
>> Now, I want that the disk of each new created vm to be with the
>> incremental statement.
>>
>> I tried so:
>> disks:
>> - id: "{{result.disk.id}}"
>> bootable: True
>> interface: virtio_scsi
>> backup: incremental
>>
>>  but it seems that the backup item is not implemented.
>>
>>
>> How to attach a disk with the incremental statement?
>>
>
> Unlike bootable, disk interface and such settings that are per relation
> between a disk and a vm, the 'backup' (method) setting is a property of the
> disk itself. If the disk was created with incremental backup enabled, it
> would remain with incremental backup enabled when attached to a vm
>
> The exact workflow is:
>
>    - The disk is created with incremental backup enabled
>    - The disk is attached to a vm(incremental backup is ok at this step)
>    - the vm is exported as a template
>    - *The disk of the new vm created from the template doesn't have the
>    incremental backup enabled!*
>
> Sounds like the imported disk of the template is not set with incremental
backup, what version of ovirt do you use?
As part of the fix for https://bugzilla.redhat.com/show_bug.cgi?id=2081556,
which was merged to 4.5.1, we started writing the incremental-backup
property to OVAs (I assume you refer to export-to-OVA since you wrote that
you export a VM as a template) - if you use an older version (than 4.5.1),
this could explain it. Otherwise, please provide the output of:

select * from base_disks where disk_id in (select device_id from vm_device
where vm_id in (select vm_guid from vm_static where
vm_name='<template-name>'));

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