Bug#939904: Temporary network disruption during upgrade

[Luca Boccassi]

On Fri, 19 Aug 2022 08:58:03 +0200 Michael Prokop <mika at debian.org>
wrote:
> Hi,
> 
> * Luca Boccassi [Thu Aug 18, 2022 at 03:20:22PM +0100]:
> > On Thu, 2022-08-18 at 16:07 +0200, Raphaël Halimi wrote:
> 
> > > And, last but not the least, I see that /etc/resolv.conf is now
part of 
> > > systemd-resolved files, which means that it would be deleted when
the 
> > > systemd-resolved package is removed from the system. I think it
would 
> > > also deserve its own bug with some high priority
> > 
> > No, that's working as intended - you remove one resolver, you need
to
> > install another one that provides it.
> 
> I just tested a few things, JFYI:
> 
> * When systemd-resolved is installed and gets removed, the
>   file/symlink /etc/resolv.conf gets removed as well. Is that really
>   expected? (This is something e.g. the resolvconf doesn't do, you
>   still end up with a /etc/resolv.conf being in-place then)
> 
> * Installation of the systemd-resolved package inside docker/podman
>   fails hard for me (running on a Debian/bullseye host):
> 
> | Unpacking systemd-resolved (251.4-1) ...
> | dpkg: error processing archive /var/cache/apt/archives/systemd-
resolved_251.4-1_amd64.deb (--unpack):
> |  unable to make backup link of './etc/resolv.conf' before
installing new version: Invalid cross-device link
> | Selecting previously unselected package libnss-resolve:amd64.
> | Preparing to unpack .../libnss-resolve_251.4-1_amd64.deb ...
> | Unpacking libnss-resolve:amd64 (251.4-1) ...
> | Errors were encountered while processing:
> |  /var/cache/apt/archives/systemd-resolved_251.4-1_amd64.deb
> | E: Sub-process /usr/bin/dpkg returned an error code (1)
> 
> (Didn't investigate further on this yet, seems to be related to the
> way dpkg handles symlinks (as set up by dh_link in the systemd
> packaging) and containers with overlay doesn't like that, though
> installing systemd inside docker/podman containers used to work fine
> so far for me)
> 
> HTH && regards
> -mika-

Yes I noticed the same thing when building images, this cross-device
check is a true annoyance and can't seem to find a workaround :-/

-- 
Kind regards,
Luca Boccassi
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: This is a digitally signed message part
URL: <http://alioth-lists.debian.net/pipermail/pkg-systemd-maintainers/attachments/20220820/118247fd/attachment.sig>