Open Stack

Hi Can,

Thank you for sharing information. I am surprised how you are running that
many nodes with a single control plan. Could you share info about how many
controllers you have? Do you have separate rabbitMQ nodes/DB nodes etc.

I have 350 compute nodes with 3x controller nodes and it works fine but the
problem is slowness. I felt it was a little slower compared to smaller
environments. Also I googled about it and most people suggested using 100
nodes per deployment for easy management.

In my deployment I have all vlan based tenants so my network nodes are kind
of useless and just for DHCP. mostly i am worried about RabbitMQ.


On Thu, Apr 6, 2023 at 2:54 AM Can Özyurt <acozyurt at gmail.com> wrote:

> Hi,
>
> Technically yes. We have had more than a thousand nodes in a single
> cell for years on production. But we are considering adding more cells
> as we grow bigger and bigger.
>
> On Thu, 6 Apr 2023 at 03:25, Satish Patel <satish.txt at gmail.com> wrote:
> >
> > Hi Can,
> >
> > You are saying a single control plan can handle 600 compute nodes?
> >
> > On Wed, Apr 5, 2023 at 5:36 PM Can Özyurt <acozyurt at gmail.com> wrote:
> >>
> >> It's totally okay to use regions as AZs if that's what you need,
> >> unless you are planning to deploy in another city. Then you will be
> >> already exhausting the term region and you will have been left with
> >> much more to deal with. Ultimately it comes down to needs and future
> >> plans.
> >>
> >> Secondly, I think you should be fine with a single cell anyway as we
> >> have much more in one cell. However experience may vary depending on
> >> the volume and characteristics of the daily workload and the design of
> >> the control plane, so maybe you should take someone else's word with
> >> more in-depth knowledge for the guidance.
> >>
> >> Cheers.
> >>
> >> On Wed, 5 Apr 2023 at 18:47, Satish Patel <satish.txt at gmail.com> wrote:
> >> >
> >> > Folks,
> >> >
> >> > This is a very broad question and could have many answers but still
> wanted to ask to see what people are thinking and doing.
> >> >
> >> > We have DC with multiple racks and around 600 nodes so we are
> planning to create 3 private openstack and each with 200 nodes. In other
> data centers we have multiple 200 nodes openstack clusters and life is
> good. In the new datacenter I am thinking of deploying the same way
> openstack but shared keystone between multiple openstack environments to
> have a single place for identification and I am going to call it 3 regions
> even it's in a single DC. Hope shared keystone is helpful/easier for doing
> terrafrom work and selecting region easily.
> >> >
> >> > Other option I was thinking about to deploy cellv2 technology and put
> all 600 nodes in single cloud but always worried for operation point of
> view. Now sure how many people running cellv2 successfully without pain.
> (Except CERN)
> >> >
> >> > If people running multi-region openstack cloud then please share some
> thought and idea to make life easier. Not looking for best solution but
> just clue to get idea to deploy and manage multiple openstack.
> >> >
> >> > Thanks in advance.
> >> > S
> >> >
> >> >
>
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