Re: [libvirt] Libvirt, nwfilter, openvswitch
On Wed, Nov 06, 2013 at 02:44:57PM +0100, Jan De Landtsheer wrote:
Hello,
I _was_ trying to set up an nwfilter for our networking set-up with VXLAN
and openvswitch, where we use VXLAN as carrier for separate networks
(unlike OpenStack gre-tunnels).
But with OVS, ebtables do not work, and the basic setup of nwfilter rules
are based on this premise... or so I understand...
Now..
Is there a way to define nwfilter rules _without_ ebtables ?
What I would like to do is quite simple (block out dhcp{4,6} services from
VM's, and ipv6 router advertisements )
There's no support for nwfilter at all when using openvswitch, due to
the kernel limitations you mention. The (disgusting) way openstack deals
with this is to create a traditional bridge per vm so you have
phys nic <-> openvswitch
\---> vm bridge <-> vm tap dev
\---> vm bridge <-> vm tap dev
\---> vm bridge <-> vm tap dev
Daniel
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