[systemd-devel] Changing configurations with networkd

[Lennart Poettering]

On Fri, 15.08.14 09:12, Michael Olbrich (m.olbrich at pengutronix.de) wrote:

> 
> On Thu, Aug 14, 2014 at 05:38:05PM +0200, Lennart Poettering wrote:
> > On Fri, 25.07.14 09:48, Michael Olbrich (m.olbrich at pengutronix.de) wrote:
> > 
> > > What I'm _not_ seeing, and what usually comes when anything else changes in
> > > the network configuration is:
> > > systemd-timesyncd[348]: Network configuration changed, trying to establish connection.
> > > 
> > > I would expect, that systemd-timesyncd should be notified in this case as
> > > well, right?
> > 
> > This should be fixed with current git. Could you please recheck?
> 
> Indeed:
> 
> Aug 01 00:20:15 BaseKit systemd-networkd[434]: eth0            : removed address: 192.168.51.144/24 (valid for 0)
> Aug 01 00:20:15 BaseKit systemd-timesyncd[346]: Network configuration changed, trying to establish connection.
> Aug 01 00:20:15 BaseKit systemd-networkd[434]: eth0            : added address: 192.168.51.145/24 (valid for 9min 30s)
> Aug 01 00:20:15 BaseKit systemd-timesyncd[346]: Network configuration changed, trying to establish connection.
> 
> I'm not sure, why the new address is found again though.
> 
> Note: this is with "net.ipv4.conf.all.promote_secondaries = 1".  Setting
> just "net.ipv4.conf.default.promote_secondaries = 1", as it's currently
> done in /usr/lib/sysctl.d/50-default.conf is not always sufficient. I think
> the default only works for new interfaces that show up afterwards.

This is in indeed a race. I changed the sysctl fragment now to write to
both *.all.* and *.default.* for all IP related sysctls.

Lennart

-- 
Lennart Poettering, Red Hat