libvirt users - Dec 2016 - How can openstack retrieve the CPU usage of a lxc via libvirt?

Dear all,

I want to have a view of lxc CPU usage in openstack Dashboard. According the
Openstack official site , Openstack Ceilometer can poll libvirt daemon to obtain
CPU usage of a virtual machine. I tried the command locally on the libvirtd host
"virsh -c lxc:/// domjobinfo", I got an error "error: this
function is not supported by the connection driver: virDomainGetJobInfo"

I am not sure if Openstack Ceilometer can retrieve the CPU usage of a linux
container, if it can, which virsh command or API should be used to this?

Thank you for your response in advance.
Cheng

On Tue, Dec 06, 2016 at 08:34:22AM +0000, WANG Cheng D
wrote:
> Dear all,
> 
> I want to have a view of lxc CPU usage in openstack Dashboard. According
the Openstack official site , Openstack Ceilometer can poll libvirt daemon to
obtain CPU usage of a virtual machine. I tried the command locally on the
libvirtd host "virsh -c lxc:/// domjobinfo", I got an error
"error: this function is not supported by the connection driver:
virDomainGetJobInfo"
virDomainGetJobInfo is for getting information about background jobs
(such as save/restore/migrate), it has nothing todo with CPU usage.

For CPU usage you need virDomainGetCPUStats


Regards,
Daniel
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