Open Stack

I'd recommend adding this to the weekly Neutron ML2 meeting agenda [1]
and discussing it there. The ML2 sub-team leads (rkukura and Sukhdev)
are both at the Neutron mid-cycle meeting this week, so I'd suggest
next week's meeting.

Thanks!
Kyle

[1] https://wiki.openstack.org/wiki/Meetings/ML2

On Wed, Jul 9, 2014 at 10:08 AM, Czesnowicz, Przemyslaw
<przemyslaw.czesnowicz at intel.com> wrote:
> Hi
>
>
>
> We (Intel Openstack team) would like to add support for dpdk based userspace
> openvswitch using mech_openvswitch and mech_odl from ML2 plugin.
>
> The dpdk enabled ovs comes in two flavours one is netdev incorporated into
> vanilla ovs the other is a fork of ovs with a dpdk datapath
> (https://github.com/01org/dpdk-ovs ).
>
> Both flavours use userspace vhost mechanism to connect the VMs to the
> switch.
>
>
>
> Our initial approach was to extend ovs vif bindings in nova and add a config
> parameter to specify when userspace vhost should be used.
>
> Spec : https://review.openstack.org/95805
>
> Code: https://review.openstack.org/100256
>
>
>
> Nova devs rejected this approach saying that Neutron should pass all
> necessary information to nova to select vif bindings.
>
>
>
> Currently we are looking for a way to pass information from Neutron to Nova
> that dpdk enabled ovs is being used while still being able to use
> mech_openvswitch and ovs_neutron_agent or mech_odl.
>
>
>
> We thought of two possible solutions:
>
> 1.      Use binding_profile to provide node specific info to nova.
>
> Agent rpc api would be extended to allow agents to send node profile to
> neutron plugin.
>
> That info would be stored in db and passed to nova when binding on this
> specific host is requested.
>
> This could be used to support our use case or pass other info to nova (i.e
> name of integration bridge)
>
>
>
> 2.      Let mech_openvswitch and mech_odl detect what binding type to use.
>
> When asked for port binding mech_openvswitch and mech_odl would call the
> agent or odl  to check what bindings to use (VIF_TYPE_OVS or
> VIF_TYPE_DPDKVHOST)
>
>
>
> So, what would be the best way to support our usecase, is it one of the
> above ?
>
>
>
> Best regards
>
> Przemek
>
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