[shepherd] Unloading a service renders shepherd unresponsive

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2 participants
  • Ludovic Courtès
  • Ludovic Courtès
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Ludovic Courtès
Severity
important
L
L
Ludovic Courtès wrote on 10 Jun 16:31 +0200
(address . bug-guix@gnu.org)
87jziwna3b.fsf@inria.fr
Seen with 0.10.4:

Toggle snippet (21 lines)
ludo@guix-hpc7 ~$ sudo herd status tor
Statut de tor :
It is running since sam. 01 juin 2024 15:58:57 (9 days ago).
Valeur d’exécution 453.
Activé.
Fournit (tor).
Requiert (user-processes loopback syslogd).
Sera relancé.
ludo@guix-hpc7 ~$ sudo herd unload root tor
Removing service 'tor'...
Done.
ludo@guix-hpc7 ~$ sudo herd status tor
^C
ludo@guix-hpc7 ~$ sudo herd status
^C
ludo@guix-hpc7 ~$ ps 453
PID TTY STAT TIME COMMAND
ludo@guix-hpc7 ~$ cat /proc/1/cmdline |xargs -0
/gnu/store/bhynhk0c6ssq3fqqc59fvhxjzwywsjbb-guile-3.0.9/bin/guile --no-auto-compile /gnu/store/39li5qpiaj1lx89xgahlbgvfnjhpcpwg-shepherd-0.10.4/bin/shepherd --config /gnu/store/2vynkp1zv8ybq513clrcp1ga1bi156wb-shepherd.conf

Inetd services such as sshd also become unavailable: shepherd accepts
connections but does not process them.

Excerpt of /var/log/messages:

Toggle snippet (8 lines)
Jun 10 16:20:29 localhost shepherd[1]: Removing service 'tor'...
Jun 10 16:20:29 localhost shepherd[1]: Stopping service tor...
Jun 10 16:20:29 localhost Tor[2]: Catching signal TERM, exiting cleanly.
Jun 10 16:20:29 localhost shepherd[1]: Service tor stopped.
Jun 10 16:20:29 localhost shepherd[1]: Service tor is now stopped.
Jun 10 16:20:29 localhost shepherd[1]: Done.

The workaround is to reboot the hard way:

sudo guile --no-auto-compile -L /gnu/store/39li5qpiaj1lx89xgahlbgvfnjhpcpwg-shepherd-0.10.4/share/guile/site/3.0/ -c '(use-modules (shepherd system)) (sync) (pk "bye!") (reboot)'

Ludo’.
L
L
Ludovic Courtès wrote on 10 Jun 18:55 +0200
control message for bug #71478
(address . control@debbugs.gnu.org)
87frtkn3es.fsf@gnu.org
severity 71478 important
quit
L
L
Ludovic Courtès wrote on 10 Jun 23:06 +0200
Re: bug#71478: [shepherd] Unloading a service renders shepherd unresponsive
(address . 71478@debbugs.gnu.org)
87bk48mrsn.fsf@gnu.org
Ludovic Courtès <ludovic.courtes@inria.fr> skribis:

Toggle quote (14 lines)
> ludo@guix-hpc7 ~$ sudo herd status tor
> Statut de tor :
> It is running since sam. 01 juin 2024 15:58:57 (9 days ago).
> Valeur d’exécution 453.
> Activé.
> Fournit (tor).
> Requiert (user-processes loopback syslogd).
> Sera relancé.
> ludo@guix-hpc7 ~$ sudo herd unload root tor
> Removing service 'tor'...
> Done.
> ludo@guix-hpc7 ~$ sudo herd status tor
> ^C

A simpler workaround is to do ‘herd stop SERVICE’ before
‘herd unload root SERVICE’.

Anyway, fixed in Shepherd commit
b81aa4d2554b9ddff683c33c0d1d7036842d2b76.

Ludo’.
L
L
Ludovic Courtès wrote on 10 Jun 23:06 +0200
control message for bug #71478
(address . control@debbugs.gnu.org)
87a5jsmrsd.fsf@gnu.org
close 71478
quit
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