[systemd-devel] Synchronization Between Services at Shutdown

[Lennart Poettering]

On Thu, 02.04.15 22:28, Martin Pitt (martin.pitt at ubuntu.com) wrote:

> Hello,
> 
> Dan Williams [2015-04-02  9:51 -0500]:
> > On Thu, 2015-04-02 at 16:31 +0200, Martin Pitt wrote:
> > > wpa_supplicant and NM already have Before=network.target which is even
> > > stronger. But that doesn't help -- it's D-Bus which we need to leave
> > > running longer, as dbus going down early tears down all dbus clients as well
> > > prematurely, thus rendering the above dependencies useless.
> > 
> > At least on the NM side, NM shouldn't be doing anything when dbus-daemon
> > exits, except logging something and trying to reconnect.
> 
> Ah, that's correct. It complains a lot, but indeed our bug reporters
> say that everything works fine with ethernet on shutdown. The remote
> fs specific problems are due to wpasupplicant going down early with
> dbus instead of at the (much later) time when we intend it to go down.
> Avahi, libvirt etc. are more "typical" dbus services which go down
> when the system dbus does, and do cause trouble.

Avahi reconnects when dbus goes away, it does not exit.

Lennart

-- 
Lennart Poettering, Red Hat