Bug#1078126: Unable to run «timedatectl» (missing d-bus dependency?)

[Camaleón]

El 2024-08-07 a las 11:13 +0200, Michael Prokop escribió:

> * Camaleón [Wed Aug 07, 2024 at 10:57:52AM +0200]:
> 
> > After installing «systemd-timesyncd», when I run timedatectl (either as root or 
> > plain user) I get an error and command is not run: 
> > 
> > root at noc11:~# timedatectl status
> > Failed to connect to bus: No such file or directory
> > 
> > This is a barebone/headless server (no X, no UI), maybe a missing 
> > dependency (d-bus?) that is not pulled to be installed but should be.
> > 
> > root at noc11:~# dpkg -l | grep -e dbus -e systemd
> > ii  libdbus-1-3:amd64            1.14.10-1~deb12u1                   amd64        simple interprocess messaging system (library)
> > ii  libsystemd-shared:amd64      252.26-1~deb12u2                    amd64        systemd shared private library
> > ii  libsystemd0:amd64            252.26-1~deb12u2                    amd64        systemd utility library
> > ii  systemd                      252.26-1~deb12u2                    amd64        system and service manager
> > ii  systemd-sysv                 252.26-1~deb12u2                    amd64        system and service manager - SysV compatibility symlinks
> > ii  systemd-timesyncd            252.26-1~deb12u2                    amd64        minimalistic service to synchronize local time with NTP servers
> 
> systemd-timesyncd depends on systemd, which further has dbus in
> recommends via:
> 
>   Recommends: default-dbus-system-bus | dbus-system-bus, systemd-timesyncd | time-daemon
> 
> So it looks like you have recommends disabled on your system.

Sure, it's a must for a clean system :-)

> If you're doing this you're leaving the defaults and need
> to handle this on your own, also see
> https://www.debian.org/doc/debian-policy/ch-relationships.html#binary-dependencies-depends-recommends-suggests-enhances-pre-depends

I would either consider:

1. Setting dbus or dbus-broker as (dep)endency for systemd; or
2. Setting dbus or dbus-broker as (rec)ommended for systemd-timesyncd.

> (Closing the bug report, as it's not a bug in systemd / systemd-timesyncd.)

Fair enough.

After installing dbus AND starting dbus daemon, the order is run as 
expected:

root at noc11:~# apt install dbus
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias... Hecho
Leyendo la información de estado... Hecho
Se instalarán los siguientes paquetes adicionales:
  dbus-bin dbus-daemon dbus-session-bus-common dbus-system-bus-common
Paquetes sugeridos:
  default-dbus-session-bus | dbus-session-bus
Se instalarán los siguientes paquetes NUEVOS:
  dbus dbus-bin dbus-daemon dbus-session-bus-common 
dbus-system-bus-common
0 actualizados, 5 nuevos se instalarán, 0 para eliminar y 0 no 
actualizados.
Se necesita descargar 544 kB de archivos.
Se utilizarán 1.020 kB de espacio de disco adicional después de esta 
operación.
¿Desea continuar? [S/n] s

(...)

root at noc11:~# systemctl start dbus
root at noc11:~# timedatectl status
               Local time: mié 2024-08-07 13:00:18 CEST
           Universal time: mié 2024-08-07 11:00:18 UTC
                 RTC time: mié 2024-08-07 11:00:18
                Time zone: Europe/Madrid (CEST, +0200)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no


Cheers,

-- 
Camaleón