Bug#1032268: release-notes: upgrading a xen VM to bookworm will change network interface name to predictable scheme

[Laura Arjona Reina]

Package: release-notes
Severity: normal
X-Debbugs-CC: pkg-systemd...@lists.alioth.debian.org

Dear Maintainer,

I upgraded a virtual machine (xen guest) from Debian 11 to bookworm,
everything went well, but lost network on reboot.
The interface had changed its name from eth0 to enX0, I guess due to
this change in systemd v 250:

* The predictable naming logic for network interfaces has been extended
to generate stable names from Xen netfront device information.

(ref: https://github.com/systemd/systemd/releases/tag/v250 )

I wonder if it would be nice to mention this in the systemd NEWS file or
in the release notes, so people do the needed changes in their machines
before rebooting the system after upgrade.

Sending this bug to release-notes but CC'ng pkg-systemd-maintainers@
Thanks!
--
Laura Arjona Reina
https://wiki.debian.org/LauraArjona

[Paul Gevers]

Control: tags -1 patch

Hi,

On 02-03-2023 15:41, Laura Arjona Reina wrote:
> The interface had changed its name from eth0 to enX0, I guess due to
> this change in systemd v 250:
>
> * The predictable naming logic for network interfaces has been extended
> to generate stable names from Xen netfront device information.
>
> (ref: https://github.com/systemd/systemd/releases/tag/v250 )

And probably this commit:
https://github.com/systemd/systemd/commit/d6eda677b32a0063a77cb639f37c9a454b180da9

> I wonder if it would be nice to mention this in the systemd NEWS file or
> in the release notes, so people do the needed changes in their machines
> before rebooting the system after upgrade.

Can you elaborate what those changes are? Or is that extremely
straightforward if you're a Xen user?

Proposed text handled here:
https://salsa.debian.org/ddp-team/release-notes/-/merge_requests/175

Paul

[Laura Arjona Reina]

Hello

El 23 de mayo de 2023 13:30:28 CEST, Paul Gevers <elb...@debian.org> escribió:
>Control: tags -1 patch
>
[...].

>
>Can you elaborate what those changes are? Or is that extremely straightforward if you're a Xen user?
>
>Proposed text handled here:
>https://salsa.debian.org/ddp-team/release-notes/-/merge_requests/175
>

I'm not sure about all the possible cases where this issue would need to be handled (and probably there are different 'ways' like changing the name in all the files where the interface is referenced, or disabling the predictable naming scheme) so a generic text as you propose looks the best to me.

Thanks!
Kind regards

--
Laura Arjona Reina
https://wiki.debian.org/LauraArjona

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