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<p class="MsoNormal">Hi<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We (Intel Openstack team) would like to add support for dpdk based userspace openvswitch using mech_openvswitch and mech_odl from ML2 plugin.<o:p></o:p></p>
<p class="MsoNormal">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 (<a href="https://github.com/01org/dpdk-ovs">https://github.com/01org/dpdk-ovs</a> ).<o:p></o:p></p>
<p class="MsoNormal">Both flavours use userspace vhost mechanism to connect the VMs to the switch.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Our initial approach was to extend ovs vif bindings in nova and add a config parameter to specify when userspace vhost should be used.<o:p></o:p></p>
<p class="MsoNormal"><span lang="PL">Spec : <a href="https://review.openstack.org/95805">
https://review.openstack.org/95805</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL">Code: <a href="https://review.openstack.org/100256">
https://review.openstack.org/100256</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL"><o:p> </o:p></span></p>
<p class="MsoNormal">Nova devs rejected this approach saying that Neutron should pass all necessary information to nova to select vif bindings.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal">
<o:p></o:p></p>
<p class="MsoNormal">We thought of two possible solutions:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use binding_profile to provide node specific info to nova.
<o:p></o:p></p>
<p class="MsoListParagraph">Agent rpc api would be extended to allow agents to send node profile to neutron plugin.<o:p></o:p></p>
<p class="MsoListParagraph">That info would be stored in db and passed to nova when binding on this specific host is requested.<o:p></o:p></p>
<p class="MsoListParagraph">This could be used to support our use case or pass other info to nova (i.e name of integration bridge)<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Let mech_openvswitch and mech_odl detect what binding type to use.<o:p></o:p></p>
<p class="MsoListParagraph">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)<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoNormal">So, what would be the best way to support our usecase, is it one of the above ?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal">Przemek<o:p></o:p></p>
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<p>--------------------------------------------------------------<br>
Intel Shannon Limited<br>
Registered in Ireland<br>
Registered Office: Collinstown Industrial Park, Leixlip, County Kildare<br>
Registered Number: 308263<br>
Business address: Dromore House, East Park, Shannon, Co. Clare</p>
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