Hi Dumitru,
On Fri, May 26, 2023 at 01:30:54PM +0200, Dumitru Ceara wrote:
> On 5/24/23 09:37, Felix Huettner wrote:
> > Hi everyone,
>
> Hi Felix,
>
> >
> > Ilya mentioned to me that you will want to bring openstack examples to
> > ovn-heater.
> >
>
> Yes, we're discussing that.
>
> > I wanted to ask how to best join this effort. It would be great for us
>
> Everyone is welcome to contribute! :)
>
Great, we will try that out.
> > to have a tool to scale test ovn. Also we have an ovn deployment with
> > currently 450 compute nodes where we can try to extract the typically
> > used northbound entries from.
> >
>
> This is great! I'm not an OpenStack user so I'm probably not using the
> right terminology and I might be missing things but I think we're
> interested in:
> - how many tenant networks do you have in the cluster
> - for each tenant network:
> - how many VMs (on average but maybe also min/max/etc)
> - how many floating IPs (dnat-and-snat)
> - how many compute nodes run VMs from this network
> - for each compute:
> - how many VMs run on it (on average but also min/max/etc)
>
Ok, so i'll try to give an overview below.
If you need any more detail just ask.
General amount of nodes:
* ~500 Hypervisors
* 9 Nodes that are just serve as gateway chassis (connected to 4
different external networks)
Amount of tenant Networks (== logical routers): 2300 (only 1400 are
actually hosting VMs).
Amount of logical Routers: 2010 (2000 of these have a chassisredirect
port that is hosted on one of the 9 nodes.
* Amount of VMs:
* min: 1
* max: 300
* avg: 4.5
* 630 networks only have a single VM, 230 have two VMs and 190 have 3
VMs.
* Amount of Hypervisors per network:
* min: 1
* max: 90
* avg: 3.6
* 650 networks only strech on a single hypervisor, 250 on two
hypervisors, 180 on three hypervisors
Regarding floating ips we have currently 1530. I'll give you the amount
per Logical router:
* min: 1
* max: 230
* avg: 2.7
* 430 routers have a single floating ip, 140 routers have 2 floating
ips.
Regarding VMs per Hypervisor we have:
* min: 1
* max: 80
* avg: 15
Other potentially interesting values:
* Amount of Load_Balancer: 0
* Amount of Logical_Switch_Port type=virtual: 800
* Amount of Port_Group: 6000
* Amount of ACL: 35500
* All of these referce portgroups in `match` using `@` or `$`
* Referencing other portgroups using `$`: 8300
Regards
Felix
> Mayba Frode and Daniel can expand on this.
>
> Regards,
> Dumitru
>
> > Thanks
> > Felix
> >
> > On Tue, May 16, 2023 at 05:38:25PM +0200, Daniel Alvarez Sanchez wrote:
> >> Hey Frode, Dumitru, thanks a lot for initiating this
> >>
> >> On Thu, May 11, 2023 at 6:05 PM Frode Nordahl <[email protected]>
> >> wrote:
> >>
> >>> Hello, Dumitru, Daniel and team,
> >>>
> >>> On Thu, May 11, 2023 at 5:23 PM Dumitru Ceara <[email protected]> wrote:
> >>>>
> >>>> Hi Frode,
> >>>>
> >>>> During an internal discussion with RedHat OpenStack folks (Daniel in cc)
> >>>> about scalability of OVN in OpenStack deployments I remembered that you
> >>>> mentioned that you're thinking of enhancing ovn-heater in order to test
> >>>> your types of deployments [0]. I assumed that those are also OpenStack
> >>>> based deployments so I was wondering if there's an opportunity for
> >>>> collaboration here.
> >>>
> >>> Thank you for reaching out to me on this topic. We do indeed have scale
> >>> testing in the context of OpenStack on our roadmap and welcome the
> >>> invitation to collaborate on this.
> >>>
> >>> As you know we did some preparation work together already as you refer
> >>> to in [0], and we thank you for your help in upstreaming ovn-heater.
> >>>
> >>> We have yet to schedule exactly when in the cycle to work on this, I
> >>> guess a next step could be to set up a meet to share some ideas and
> >>> see how it aligns?
> >>
> >>
> >>> If that resonates with you, I'd be happy to organize.
> >>>
> >>
> >> Sounds good, please do :)
> >>
> >>
> >>>
> >>>> Having OpenStack-like scenarios in ovn-heater would really allow OVN
> >>>> developers to profile/troubleshoot/optimize OVN for those use cases too.
> >>>>
> >>>> Well, in general, the above is true for any other CMS too.
> >>>
> >>> Yes, this is what we have been thinking as well. We are supporting other
> >>> products in their journey with OVN as well, so similar projects may come
> >>> from those in the future.
> >>>
> >>
> >> Yes, we can try to model OpenStack-like scenarios for ovn-heater where the
> >> resources are generally more distributed across the hypervisors than in k8s
> >> for example, perhaps larger L2 domain sizes, etcetera.
> >> Happy to discuss further!
> >>
> >> daniel
> >>
> >>
> >>> --
> >>> Frode Nordahl
> >>>
> >>>> Thanks,
> >>>> Dumitru
> >>>>
> >>>> [0]
> >>> https://mail.openvswitch.org/pipermail/ovs-dev/2023-March/402680.html
> >>>>
> >>>
> >>>
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