CR: ignore errors from cd-rom storage for backups

[niziak]

Hello.
I think backup process should completely ignore state of cd-rom drive. Today one backup fails because of:

709: 2024-07-21 01:50:12 INFO: creating Proxmox Backup Server archive 'vm/709/2024-07-20T23:50:12Z'
709: 2024-07-21 01:50:12 INFO: starting kvm to execute backup task
709: 2024-07-21 01:50:12 ERROR: Backup of VM 709 failed - volume 'cephfs:iso/VS2008ExpressWithSP1ENUX1504728.iso' does not exist

 

[dcsapak]

I think backup process should completely ignore state of cd-rom drive.

IMO that's not really possible because:
* to backup the vm it has to be started (in a paused state) so one can start the vm anytime (even when currently backing up)
* to properly start the vm, the isos must be available, because we cannot know if they're essential for e.g. the boot process or the vm itself

 

[fabian]

see https://bugzilla.proxmox.com/show_bug.cgi?id=4225