Open Stack

Hello Sean and Jean-François,

Thanks for your answers. I am getting myself into the world of Openstack and I have few questions on similar subject.

You mentioned that the development team is moving towards Debian images for containers for kolla ansible. Does it mean they will drop the support for CentOS 8 Stream in near future?

From my understanding, Openstack ansible can be deployed without use of linux containers at all. Did someone try this approach? Is it scalable and stable? The problem is we might have restrictions on using containers at our organisation. So, a container-less solution for deploying and operating Openstack would be very helpful for us.

At what scale TripleO starts to pay off? We will have a cluster of 100-200 nodes soon and we will deploy Openstack on it. What would be a good deployment method for that scale? 

Thanks

Regards
Mahendra

> On 2 Feb 2022, at 18:44, Sean Mooney <smooney at redhat.com> wrote:
> 
> On Wed, 2022-02-02 at 17:07 +0000, Michael STFC wrote:
>> Hi All:
>> 
>> I am kind of new to Openstack and want to setup openstack learning env or lab at home.
>> 
>> I have 3 HP MicroServers g8 with 16GB RAM and 5 HP MicroServers g7 with 8 GB RAM - all have dual or quad NIC and I have a 24 ports Aruba switch with VXLAN feature, older HP Procurve 24 switch. 
>> 
>> I am looking into have 3 nodes for run services and 2 for compute and remaining 3 for Ceph. 
>> 
>> Any advise on OS and which openstack distro I should and link to the documentations or guides?
> most common distros have good support for openstack at this point.
> there are several installers to choose form personally kolla-ansible is my prefered install openstack ansible might also be good for your scale
> but i have not used it much. triploe is proably overkill and i would not advise using it as your first into to openstack
> 
> so assuming you are not going to use this for developing openstack kolla-ansible on debian or ubuntu with the source install option would be
> my recommendation it has pretty good support for centos too but i belive they are moveing to mainly using debain images for the contianers
> going forward so using a deb based host might have less issues
> 
> openstack ansibale i belive also supports both the rpm and deb worlds so really you can pick your poision with regard to
> host OS. i would go with what you are most comforatbale with but ubuntu 20.04 is what most of our upstream ci uses
> 
> if you are plannig t do developemnt i would use devstack but if you want this as a home lab to then run workload on i would use somethig else.
> 
> for ceph cephadm is proably the way to go and you should be able to integrate a standalone ceph cluster with this deployment.
> kolla support external ceph and i suspect openstack ansible does too.
> 
> one thing to note is i proably woudl proably also run the nova compute serive on the contolers to get the most out of the cluster.
> 
> even with only 8gb of ram you can run a full contoler and have 1-2 GB of ram left over for vms
> so unless you decide to have the contoler also run ceph i would co locate the compute service on the contoler too
> 
> if you do plan to have ceph and the openstack contolers coloacated then i would reuse the 3 nodes you planned ot dedicated fro ceph as computes.
> 
> you certenly can have each system have a singel role but you can consolidate into a hyperconverd toplogy too.
>> 
>> Regards,
>> 
>> Michael
>> 
>> 
>> 
> 
>