[Openstack-operators] [openstack-operators] how to get current resource usage of an instance

Matt Riedemann mriedem at linux.vnet.ibm.com
Wed Sep 16 13:14:07 UTC 2015

On 9/16/2015 5:24 AM, Abhishek Talwar wrote:
> Hi Folks,
> I have an OpenStack kilo setup and I am trying to get the memory usage
> of the instances created in it.
> I researched and found that ceilometer has a meter called "memory.usage"
> that can give us the memory utilization of an instance. However, on
> doing ceilometer meter-list it does not list "memory.usage" as a meter.
> After searching I found that this problem is being faced by many
> contributors and a possible solution is changing nova configurations
> that does not help.
> So can you help me with some other possible solution that can help me in
> finding an instance's current memory utilization. I am working with
> something that would require getting the memory and disk utilization.
> Please provide a solution for this.
> Thanks and Regards
> Abhishek Talwar
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The server diagnostics API in nova would also provide memory usage:


In stable/kilo the code for that is here:


Note that in the v2 API the diagnostics returned from the API is 
different depending on the backing hypervisor.

In the v2.1 API there is a uniform diagnostics dict returned which is 
virt-driver agnostic.  In v2.1 you get a serialized form of this 
Diagnostics object:




Matt Riedemann

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