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Bug#1035349: regression: 'hostname' preseed alias for netcfg/get_hostname takes precedence over DHCP hostname


Cyril Brulebois <kibi@debian.org> (2023-05-03):
> It's entirely untested for the time being, but I've tested a few things
> inside an installer context, checking how hostname behaves when setting
> and when getting the hostname (even if I already alluded to it in the
> other bug report), and picking one of two possible options. You can find
> details in the comments above the command getting added:
>   https://salsa.debian.org/installer-team/preseed/-/commit/2d83a156b3e50e3a35dd9964090967ac1761f85f
> I'll probably just find a dnsmasq config to tweak to force hostnames,
> check a netboot/gtk/mini.iso against it, and upload if that behaves
> better than D-I Bookworm RC 2.

Setting “hostname=foo” at the very end of the ISOLINUX or GRUB prompts,
respectively under KVM and its default configuration (no DHCP-provided
hostnames) and on a Dell laptop connected to a dnsmasq assigning DHCP

 - With RC 2, the hostname prompt is skipped, and “foo” is used in both

 - With the modified netboot/gtk/mini.iso, the hostname prompt is
   skipped as well, “foo” is used under KVM, but “dellicious” is used on
   baremetal despite the hostname=foo trap.

And when I say “is used”, I mean ends up being stored for cdebconf under
netcfg/get_hostname (at least according to /var/lib/preseed/log), instead
of “foo” previously.

 - I didn't actually perform any of those 4 installations in full.
 - Package just uploaded.
 - Daily builds dated 2023-05-04 should have all the required bits;
   I might trigger an out-of-crontab build for amd64/i386 later today
   if that helps people start testing right away.

> In the meanwhile, if you spot something fishy in the reasoning or in
> the implementation, please let me know.

Still valid.

Cyril Brulebois (kibi@debian.org)            <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant

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