we group our different types of servers in host aggregates. some older hardware, some newer. is it possible to tell nova to use different cpu and memory ratios (cpu_allocation_ratio and ram_allocation_ratio) on different host aggregates?
Yes, its possible to do this.
nova aggregate-set-metadata 1 cpu_allocation_ratio=8
nova aggregate-set-metadata 4 cpu_allocation_ratio=10
nova aggregate-set-metadata 1 ram_allocation_ratio=1
nova aggregate-set-metadata 4 ram_allocation_ratio=1.5
Here the 1 and 4 are the ID of your Aggregates.
thanks :) however, i just tried in on liberty and i can still over provision ram and cpu... in my test setup i have one compute and one hybrid compute/controller - although the latter has the hypervisor service disabled. does disabling the nova service on a hypervisor not exclude it from calculation
Asked: 2016-04-08 17:45:04 -0600
Seen: 511 times
Last updated: Apr 09 '16
Compute nodes cannot be in two different availability zones, so, configuring nova compute nodes with different allocation ratios should do the job.