Open Stack

On Fri, 2021-08-27 at 19:09 +0530, Hrishikesh Karanjikar wrote:
> Hi Sean,
> 
> Thanks a lot for the clarification.
> I am wondering how smart nics attached to a compute node (which runs
> ovs-dpdk) can be configured using sdn controllers so that the
> ovs/tunneling/ipsec functionality on the compute node is offloaded to
> smartnic and compute node cpu is free to do other stuffs?

i responed privatly too but what you are discribing is hardware offloaded ovs
https://docs.openstack.org/neutron/latest/admin/config-ovs-offload.html
which is supported by ml2/ovs and ml2/ovn although with most testign done with ml2/ovs

in general this feature is not compatible with sdn contolers today although as i noted
in my other respocne contrail has limited support for hardwar offload with there vrouter solution
but i generally do not recommend that  solution since it has miniumal testing upstream.

there is some other work to move ovs entirely to run on the smart nics where those smatnics have
embded arm cores. that work is very much not ready for production and still under design
there are 3 competting approches to taht on via ironic one via cybrog and one in nova.
they all work slightly differnetly and serve slightly differnt usecase and hardware.

if you want somethin you can use today or even in the next 12 months you want hardware offload
ovs with ml2/ovs or possibel ml2/ovn although ovn support for hardware offload is much newer and
less well tested although long term that is likely where more of the investment will go.

> 
> Thanks,
> Hrishikesh
> 
> On Fri, Aug 27, 2021 at 5:38 PM Sean Mooney <smooney at redhat.com> wrote:
> 
> > On Fri, 2021-08-27 at 13:03 +0530, Hrishikesh Karanjikar wrote:
> > > Hi Slawek,
> > > 
> > > Thanks for your reply.
> > > Can you guide Which SDN controller is best and supported in Netron via
> > ML2
> > > plugin/driver.
> > 
> > in general the design of openstack/neutron is such that it owns the ovs
> > bridges and
> > flow rules and you as a openstack operator shoudl not need to manage
> > anything.
> > 
> > neutron itself is an sdn contoler that allows self service network
> > configureation vai
> > its rest api and an abstraction layer between the end user and underlying
> > implemantion.
> > 
> > it can delegate the swich configuration to external sdn contoler but even
> > in that case
> > you are not intned to modify flows on the integration bridge via the sdn
> > contoler manually.
> > 
> > the sdn contoler can be used to manage your top of rack swithc and other
> > infrasturue not managed
> > by neutron but there is ment to be a seperation of concerns. all
> > networking on comptue nodes shoudl be
> > manageged via the neutron api and only your datacenter infrastucrue should
> > be manageve by you via the
> > sdn contoelr.
> > 
> > 
> > > 
> > > Thanks,
> > > Hrishikesh
> > > 
> > > On Fri, Aug 27, 2021 at 12:18 PM Slawek Kaplonski <skaplons at redhat.com>
> > > wrote:
> > > 
> > > > Hi,
> > > > 
> > > > On piątek, 27 sierpnia 2021 07:18:10 CEST Hrishikesh Karanjikar wrote:
> > > > > Hi Sean,
> > > > > 
> > > > > I am new to this domain.
> > > > > My use case is simple,
> > > > > 
> > > > > I have a node that runs OvS and I want to manage the flows remotely
> > using
> > > > > an SDN controller.
> > > > > Initially I tried with ODL but it does not have a Web UI like ONOS
> > has.
> > > > > So I was using ONOS.
> > > > > I am not sure if Neutron would do the same. If it is possible then I
> > will
> > > > > not need any other SDN controller.
> > > > 
> > > > Neutron is generally providing connectivity for Your VMs/routers/etc
> > and
> > > > it
> > > > may use different backend. If You will use e.g. ML2 plugin with OVN
> > > > backend,
> > > > Neutron will configure OVN and OVN will then configure flows in OVS on
> > the
> > > > nodes
> > > > to achieve that.
> > > > But if You are looking for a tool which will allow You to see OpenFlow
> > > > rules
> > > > on each node, and manipulate them with some GUI, then Neutron is not
> > for
> > > > You.
> > > > It don't have such functionality.
> > > > 
> > > > > 
> > > > > I am not doing any deployment yet.
> > > > > 
> > > > > Thanks,
> > > > > Hrishikesh
> > > > > 
> > > > > On Thu, Aug 26, 2021 at 5:00 PM Sean Mooney <smooney at redhat.com>
> > wrote:
> > > > > > On Thu, 2021-08-26 at 16:41 +0530, Hrishikesh Karanjikar wrote:
> > > > > > > Hi Sean,
> > > > > > > 
> > > > > > > Thanks for your reply.
> > > > > > > I was expecting the same answer as I also read the github link
> > you
> > > > sent.
> > > > > > > I may need to try older versions of openstack in that case.
> > > > > > 
> > > > > > do you specificaly need onos for some reason.
> > > > > > 
> > > > > > if not i would not suggest building a production deployment with
> > > > something
> > > > > > that realiticlly is
> > > > > > very unlikely to ever be supported again. you basically will be
> > stuck
> > > > on
> > > > > > train with no upgrade
> > > > > > path.
> > > > > > 
> > > > > > > Hrishikesh
> > > > > > > 
> > > > > > > On Thu, Aug 26, 2021 at 4:27 PM Sean Mooney <smooney at redhat.com>
> > > > wrote:
> > > > > > > > On Thu, 2021-08-26 at 15:31 +0530, Hrishikesh Karanjikar wrote:
> > > > > > > > > Hi,
> > > > > > > > > 
> > > > > > > > > Does Openstack latest release support ONOS?
> > > > > > > > 
> > > > > > > > the short answer is no
> > > > > > > > technially upstream has never supported it because it was a big
> > > > tent
> > > > > > > > projec that was
> > > > > > > > never an offical deliverable of the netwroking team.
> > > > > > > > https://github.com/openstack-archive/networking-onos has been
> > > > retired
> > > > > > > > as has https://opendev.org/openstack/networking-onos. the last
> > > > release
> > > > > > > > seams to have been from train but
> > > > > > > > even then im not sure that it was still active.
> > > > > > > > it looks like the onos projecct move the openstack install info
> > > > under
> > > > > > 
> > > > > > teh
> > > > > > 
> > > > > > > > obsolete paages
> > > > > > 
> > > > > > 
> > > > 
> > https://wiki.onosproject.org/display/ONOS/networking-onos+install+guides+per
> > > > > > +each+OpenStack+version>
> > > > > > > > so it does not look like the intend to support openstack
> > anymore.
> > > > 
> > > > 
> > > > --
> > > > Slawek Kaplonski
> > > > Principal Software Engineer
> > > > Red Hat
> > > 
> > > 
> > > 
> > 
> > 
> > 
>