Open Stack

Hey all,

I am having a rather serious with the central (OpenStack' Essex)
nova-network gateway we have set up.
We have quite some floating IPs assigned to a few virtual machines, and it
just works.
But since a few days (or weeks)  I notice that some VM does not get inbound
traffic from
external IPs, such as the internet, through the floating IP to be DNAT'ed
to the application VM.

We tried to debug it, and it is definitely something with nova-network
service going wrong here.

Now, a `pkill dnsmasq && sleep 2 && initctl restart nova-network` actually
fixes it.

The question now is *why* does it fix it. The routing tables do not really
seem to have changed,
unless I was missing something while checking :).

Is there anything nova-network is doing as well except setting up IPs and
iptables?
Or - what is nova-network actually doing in general and what could be the
reason the run into
such a situation.

Many thanks in advance,
Christian.
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