Open Stack

Thanks!!! It's helpful. We are using an openstack-ansible tool for
deployment. Ma

On Thu, Apr 6, 2023 at 12:44 PM Can Özyurt <acozyurt at gmail.com> wrote:

> Hi Satish,
>
> We have separate RMQ/DB nodes. I think 5 and 7 nodes respectively. Yet
> all these nodes are listed under [control] as well, they still get
> other controller components deployed on them. However I think the big
> difference is that they are high-end bare metal servers: apps have
> plenty of resources to run on. Big machines, easy life.
>
> As to slowiness: I never noticed any slowiness when I work through
> APIs or Horizon. Maybe I got used to it and forgot how fast it used to
> be. If you have strict response time policies, it may not be ideal.
> But since it's a private cloud,  we consider it as a simple trade-off.
>
> I don't want to jinx it for myself but we haven't had a RMQ issue for
> a while now. I have heard people taking care of small clusters
> complain about RMQ too: at this point I am not sure if RMQ has a
> scaling problem or it's just luck of a draw.
>
> As I said above, it comes down to choice. We chose this way because we
> can tolerate its shortcomings.
>
> On Thu, 6 Apr 2023 at 18:37, Satish Patel <satish.txt at gmail.com> wrote:
> >
> > 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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