Hi,

I'm playing around with host aggregates and the 
aggregate_instance_extra_specs for flavors. I successfully created a 
host aggregate, it allows me to schedule instances with a specific 
flavor on that aggregate only. But is there a way to prevent other VMs 
from starting on that aggregate (which were launched with different 
flavors)? The only thing coming to mind is to put that compute node(s) 
into a different availbility zone. Since the default is "nova", this 
would prevent anything else to start on that hypervisor. Is there 
anything I missed with aggregates? Any pointers are appreciated!

Thanks!
Eugen