Re: [pve-devel] [PATCH storage] fix #4289: pbs: wait for backup verification to finish before updating volume attribute

[Fiona Ebner <f.ebner@proxmox.com>]

Am 10.01.23 um 14:06 schrieb Fiona Ebner:
> Am 10.01.23 um 13:44 schrieb Christoph Heiss:
>> On Tue, Jan 10, 2023 at 01:34:14PM +0100, Fiona Ebner wrote:
>>> One way to decide if the current behavior should be used as a fallback
>>> would be to check the protected status after finishing the backup. That
>>> is slightly racy though, because something else could've already changed
>>> the protection between finishing and the check.
>> I'd base it off the decision from above - if the `proxmox-backup-client`
>> version supports setting it directly, use that, otherwise simply fall
>> back.
> It's not just the client, but the server that needs to support it too.
> To make sure that the client/QEMU/etc. support it, we can just have
> pve-manager depend on a recent enough version. For the server, there is
> a /version API endpoint we can query.

For QEMU, we don't want to force specific package versions, so using
package dependency is not good there. Instead, we can use the
'query-proxmox-support' QMP command to see if it's supported. That also
makes the check work for already running VMs.