Open Stack

Firstly, use Ironic. Nova BM is deprecated.

Secondly, yes, you can use extra-specs, but you only need to do that
if your machines are identical in CPU, disk and memory - which the
scheduler will look at anyway. Why do you need to group IBM and Dell
machines together?



-Rob

On 30 June 2014 16:26, Taurus Cheung <Taurus.Cheung at harmonicinc.com> wrote:
> Hi,
>
>
>
> I am working on deploying images to bare-metal machines using nova
> bare-metal. My datacenter has 2 types of hw models, IBM and Dell. In
> existing implementation, if I want to deploy image on specified type of hw
> model, I need to setup 2 baremetal compute nodes, one for container of IBM
> machine, the other for Dell machine. Then baremetal register machines to
> their corresponding compute node. Finally use nova flavor and heterogeneous
> group to map specified compute node so I can explicitly specify the hw model
> to deploy, as illustrated as following flow chart:
>
>
>
> Flavor_IBM -> (mapping by flavor extra_spec) -> Heterogeneous_Group_IBM ->
> Compute_Node_IBM -> IBM machines
>
> Flavor_Dell -> (mapping by flavor extra_spec) -> Heterogeneous_Group_Dell ->
> Compute_Node_Dell -> Dell machines
>
>
>
> The existing approach has a drawback: I need to setup 1 baremetal compute
> node for each hw model. If I have 10 hw models in my datacenter, I need to
> setup 10 baremetal compute node, which would be a high overhead. Is there
> any update in ironic to tackle this?
>
>
>
> I think one of the possible enhancement is adding a field like hw_model in
> nova.bm_nodes DB and passing to nova scheduler, so different hw models of
> machine can under the same baremetal compute node and heterogeneous group.
> Just using different extra_spec in nova flavor to specifiy hw_model. Is it a
> good idea?
>
>
>
> Regards,
>
> Taurus
>
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>



-- 
Robert Collins <rbtcollins at hp.com>
Distinguished Technologist
HP Converged Cloud