[libvirt-users] Redhat 7: cgroup CPUACCT controller is not mounted

[youssef.elfathi at orange.com]

Thanks Martin to confirm that the issue is due to privilege access. How can I run a domain as non-root and be able to access the cpu information?

-----Original Message-----
From: Martin Kletzander [mailto:mkletzan at redhat.com] 
Sent: Tuesday, February 28, 2017 16:18
To: EL FATHI Youssef OBS/OINIS
Cc: libvirt-users at redhat.com
Subject: Re: [libvirt-users] Redhat 7: cgroup CPUACCT controller is not mounted

On Mon, Feb 27, 2017 at 01:44:44PM +0000, youssef.elfathi at orange.com wrote:
>Hi,
>
>With a non-root user account, I am launching virtual machines and would like to get CPU stats for each Core (using python API or not) but face the following problem:
>
>- When I issue the command "virsh --readonly cpu-stats MY_DOMAIN" I got the following error:
>
>error: Failed to retrieve CPU statistics for domain 'MY_DOMAIN'
>error: Requested operation is not valid: cgroup CPUACCT controller is 
>not mounted
>

Since you are running the domain in session mode (non-root), libvirtd doesn't have the privileges for creating a mount point for the domain and hence the controller is available to use.  So I guess it's just a matter of the error message being ambiguous.

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