Re: [RFC proxmox{,-backup} 0/2] fix #7198: count veth uplink for PBS running in an LXC

[Jakob Klocker <j.klocker@proxmox.com>]

On 7/7/26 2:15 PM, Gabriel Goller wrote:
> This seems a bit like a band-aid fix to me. Why do we not just get the uplink
> interface via the default route: e.g. `ip -j route get 1.1.1.1 | jq .[0].dev`?
> 

As Fabian mentioned, this wouldn't cover multiple interfaces. If one
separates backup traffic onto a dedicated interface, that traffic
wouldn't get picked up.

IMO the `veth` check is the right call here, at least I haven't found
a better way. I'm open for suggestions though.

What I'm still concerned about is whether it is necessary to handle
enslaved veth, since they would get picked up. I can't think of a real
use case where one would want to create such a setup in an LXC, but
since I'm not that experienced in that topic I'm happy for input!

Since running a PBS in an LXC is already not that common, paired with
renaming the interface to a not "normal" name, I would argue that
handling the enslaved veth is not really necessary.