Hi, operators, I have an environment running openstack havana which enables ceilometer service, and I set notify_on_state_change = vm_and_task_state in /etc/nova/nova.conf. So there are notifications being sent when instances state and task status changed, the problem that the end users may create alarm based on instance count, which means statistics on instance meter will be used, which leading to an incorrect state of alarm, because there may be 5 vm but has 10 instances sample in 1 periods.
I think the cpu_util can replace the instance, but what about the vm has multiple cpu? So, it is really confused me how to check vm count through statistics api Can anyone share your experience? Or is there some material can be read? Thanks!
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