#32182 - Login fail after core-update without reboot

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

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From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
To: Ludovic Courtès <ludo@gnu.org>
Subject: Re: bug#32182: Login fail after core-update without reboot
References: <655514906.8428771.1531816208634.JavaMail.zimbra@inria.fr>
 <87r2juqegc.fsf@gnu.org> <87mu6q5rnn.fsf@gnu.org>
 <878rwksfvt.fsf@gmail.com>
Date: Thu, 16 Dec 2021 11:15:44 -0500
In-Reply-To: <878rwksfvt.fsf@gmail.com> (Maxim Cournoyer's message of "Thu, 16
 Dec 2021 10:56:06 -0500")
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Cc: 32182@debbugs.gnu.org, Pierre-Antoine Rouby <pierre-antoine.rouby@inria.fr>
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Hi again,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

> Hello,
>
> Ludovic Courtès <ludo@gnu.org> writes:
>
> [...]
>
>>> I can think of several solutions:
>>>
>>>   1. Arrange for services to refer to /gnu/store/…-pam.d instead of
>>>      /etc/pam.d.  This can maybe be achieved by modifying PAM such that
>>>      these applications honor $PAM_DIRECTORY or something like that.
>>>
>>>   2. Add support for “service chain-loading” in the Shepherd and/or
>>>      GuixSD.  The idea is that, for services that cannot be restarted
>>>      right away because they are currently running, register code to
>>>      upgrade the service next time it is restarted (see
>>>      <https://bugs.gnu.org/30706>).  That way, when ‘login’ restarts
>>>      after ‘reconfigure’, it’s the new ‘login’ service that would be
>>>      restarted.
>>
>> That bit was implemented long ago with Shepherd service replacements.
>> So at least, now, one can run ‘herd start term-tty1’ or similar to get a
>> working login:
>
> Point 2 doesn't seem to help in working around or fixing the related
> #52533 though, correct?  Restarting the remote elogind or even
> ssh-daemon doesn't work there, perhaps because 'guix deploy' wasn't able
> to complete in the first place.

Another bit that probably played a role here: the above failure to
complete is perhaps caused/made worst by #41238 (guix deploy close ssh
session after each store items sent), which doesn't reuse the same
stable SSH session to do the whole of what it needs to do.

Maxim

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#32182 Login fail after core-update without reboot