[libvirt-users] virDBusCallMethod:1173 : Launch helper exited with unknown return code

[Ján Tomko]

On 01/15/2014 09:05 AM, Karoline Haus wrote:
> I have trouble starting a VM using virsh start $vm. I do this as root, because
> as non-root user it did not work at all (especially it failed attaching to the
> networks).

Non-root virsh connects to qemu:///session by default, which spawns an
unprivileged daemon instead of using the system one, see
http://libvirt.org/uri.html#URI_qemu

> So, when I run the command (with sudo), I get the following error
> in libvirtd.log:
> 
> 2014-01-15 07:51:00.423+0000: 16158: warning : qemuDomainObjTaint:1573 :
> Domain id=5 name='vader' uuid=f5b8c05b-9c7a-3211-49b9-2bd635f7e2aa is tainted:
> high-privileges
> 2014-01-15 07:51:00.428+0000: 16158: error : virDBusCallMethod:1173 : Launch
> helper exited with unknown return code 1
> 
> At the same time I get an error in /var/log/messages which seems related:
> Jan 15 07:51:00  dbus[15845]: [system] Activating service
> name='org.freedesktop.machine1' (using servicehelper)
> Jan 15 07:51:00  dbus[15845]: [system] Activated service
> 'org.freedesktop.machine1' failed: Launch helper exited with unknown return code 1
> 

It seems this is the error that happens when systemd is not the init [1].

Libvirt only tries to use systemd for creating cgroups for the VM if the
'org.freedesktop.machine1' service is present, otherwise it falls back to the
manual way of creating them.

Jan

[1] https://bugs.freedesktop.org/show_bug.cgi?id=69962

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