[openstack-dev] [nova][scheduler] Availability Zones and Host aggregates..

Chris Friesen chris.friesen at windriver.com
Wed Mar 26 17:15:24 UTC 2014

On 03/26/2014 10:47 AM, Vishvananda Ishaya wrote:
> Personally I view this as a bug. There is no reason why we shouldn’t
> support arbitrary grouping of zones. I know there is at least one
> problem with zones that overlap regarding displaying them properly:
> https://bugs.launchpad.net/nova/+bug/1277230

There's also this bug that I reported a while back, where nova will let 
you specify multiple host aggregates with the same zone name.


If the end user then specifies the availability zone for an instance, it 
is unspecified which aggregate will be used.

> There is probably a related issue that is causing the error you see
> below. IMO both of these should be fixed. I also think adding a compute
> node to two different aggregates with azs should be allowed.
> It also might be nice to support specifying multiple zones in the launch
> command in these models. This would allow you to limit booting to an
> intersection of two overlapping zones.

Totally agree.  I actually mention both of these cases in the comments 
for the bug above.


More information about the OpenStack-dev mailing list