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Hi Robert,
Thank you very much for sharing the information regarding your efforts. Can you please share your idea of the end to end flow? How do you suggest  to bind Nova and Neutron?

The blueprints you registered make sense. On Nova side, there is a need to bind between requested virtual network and PCI device/interface to be allocated as vNIC.
On the Neutron side, there is a need to  support networking configuration of the vNIC. Neutron should be able to identify the PCI device/macvtap interface in order to apply configuration. I think it makes sense to provide neutron integration via dedicated Modular Layer 2 Mechanism Driver to allow PCI pass-through vNIC support along with other networking technologies.

During the Havana Release, we introduced Mellanox Neutron plugin that enables networking via SRIOV pass-through devices or macvtap interfaces.
We want to integrate our solution with PCI pass-through Nova support.  I will be glad to share more details if you are interested.

The PCI pass-through networking support is planned to be discussed during the summit: http://summit.openstack.org/cfp/details/129. I think it's worth to drill down into more detailed proposal and present it during the summit, especially since it impacts both nova and neutron projects.

Would you be interested in collaboration on this effort? Would you be interested to exchange more emails or set an IRC/WebEx meeting during this week before the summit?


Regards,
Irena


From: Robert Li (baoli) [mailto:baoli at cisco.com]
Sent: Friday, October 25, 2013 11:16 PM
To: prashant.upadhyaya at aricent.com<mailto:prashant.upadhyaya at aricent.com>; Irena Berezovsky; yunhong.jiang at intel.com<mailto:yunhong.jiang at intel.com>; chris.friesen at windriver.com<mailto:chris.friesen at windriver.com>; yongli.he at intel.com<mailto:yongli.he at intel.com>
Cc: OpenStack Development Mailing List; Brian Bowen (brbowen); Kyle Mestery (kmestery); Sandhya Dasu (sadasu)
Subject: Re: [openstack-dev] [nova] [neutron] PCI pass-through network support

Hi Irena,

This is Robert Li from Cisco Systems. Recently, I was tasked to investigate such support for Cisco's systems that support VM-FEX, which is a SRIOV technology supporting 802-1Qbh. I was able to bring up nova instances with SRIOV interfaces, and establish networking in between the instances that employes the SRIOV interfaces. Certainly, this was accomplished with hacking and some manual intervention. Based on this experience and my study with the two existing nova pci-passthrough blueprints that have been implemented and committed into Havana (https://blueprints.launchpad.net/nova/+spec/pci-passthrough-base and
https://blueprints.launchpad.net/nova/+spec/pci-passthrough-libvirt),  I registered a couple of blueprints (one on Nova side, the other on the Neutron side):

https://blueprints.launchpad.net/nova/+spec/pci-passthrough-sriov
https://blueprints.launchpad.net/neutron/+spec/pci-passthrough-sriov

in order to address SRIOV support in openstack.

Please take a look at them and see if they make sense, and let me know any comments and questions. We can also discuss this in the summit, I suppose.

I noticed that there is another thread on this topic, so copy those folks  from that thread as well.

thanks,
Robert

On 10/16/13 4:32 PM, "Irena Berezovsky" <irenab at mellanox.com<mailto:irenab at mellanox.com>> wrote:

Hi,
As one of the next steps for PCI pass-through I would like to discuss is the support for PCI pass-through vNIC.
While nova takes care of PCI pass-through device resources  management and VIF settings, neutron should manage their networking configuration.
I would like to register a summit proposal to discuss the support for PCI pass-through networking.
I am not sure what would be the right topic to discuss the PCI pass-through networking, since it involve both nova and neutron.
There is already a session registered by Yongli on nova topic to discuss the PCI pass-through next steps.
I think PCI pass-through networking is quite a big topic and it worth to have a separate discussion.
Is there any other people who are interested to discuss it and share their thoughts and experience?

Regards,
Irena

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