libvirt users - Feb 2012 - Unable to collect VM metrics for ESX using libvirt

Hi,

I am trying to connect to a server running esx and collect system metrics
like cpu usage, network and disk iops. I am able to establish the
connection successfully and obtain VM information such as ids, domain
names, config xml etc. But I am unable to collect statistics.

I am using the python interface and if I do ,

conn=libvirt.openAuth(uri, auth, 0)
dom-conn.lookupByID(id) // Where id is the domain id of the vms

netstats=dom.interfaceStats(interface)

gives an error libvirt.libvirtError: this function is not supported by the
connection driver: virDomainInterfaceStats

The same goes for block stats. For the cpu, I used,

cpu=dom.info()[4]

but, that always returns 0 (I thought it was cumulative and returns a huge
value)

I have used similar scripts with xen and kvm and it worked well. Can
someone tell me what mistake I am doing or if the driver doesnt support
these functions, is there any other way of getting the stats ?? Thank you.

-
Regards,
Sethuraman Subbiah

Graduate Student - NC state University
M.S in Computer Science
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On 02/10/2012 09:35 AM, sethu subbiah wrote:
> gives an error libvirt.libvirtError: this function is not supported by the
> connection driver: virDomainInterfaceStats
> 
> I have used similar scripts with xen and kvm and it worked well. Can
> someone tell me what mistake I am doing or if the driver doesnt support
> these functions, is there any other way of getting the stats ?? Thank you.
The error message is correct - no one has yet submitted patches for the
ESX backend driver in libvirt to provide those statistics.  Your code is
correct, and will start working if anyone ever patches ESX to provide
the information.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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