[openstack-dev] [nova] nova aggregate and nova placement api aggregate

Matt Riedemann mriedemos at gmail.com
Fri May 25 05:56:33 UTC 2018

On 5/24/2018 8:33 PM, Jeffrey Zhang wrote:
> Recently, i am trying to implement a function which aggregate nova 
> hypervisors
> rather than nova compute host. But seems nova only aggregate 
> nova-compute host.
> On the other hand, since Ocata, nova depends on placement api which supports
> aggregating resource providers. But nova-scheduler doesn't use this feature
> now.
> So  is there any better way to solve such issue? and is there any plan which
> make nova legacy aggregate and placement api aggregate cloud work together?

There are some new features in Rocky [1] that involve resource provider 
aggregates for compute nodes which can be used for scheduling and will 
actually allow you to remove some older filters 
(AggregateMultiTenancyIsolation and AvailabilityZoneFilter). CERN is 
using these to improve performance with their cells v2 deployment.




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