Re: [libvirt-users] Host information from libvirt KVM/Xen
If you are primarily interested in collecting statistics, then you
might want to take a look at installing Host sFlow agents on your
hypervisors - Xen, Hyper-V and KVM are supported:
http://host-sflow.sourceforge.net/
The Host sFlow agents export a superset of the metrics you would get
by polling with libvirt, and moving to a push model greatly increases
scaleability of the monitoring system:
http://blog.sflow.com/2012/08/push-vs-pull.html
You can collect the stats using tools like Ganglia and Graphite:
http://blog.sflow.com/2012/01/using-ganglia-to-monitor-virtual.html
http://blog.sflow.com/2012/01/graphite.html
On platforms including Open vSwitch, or on Hyper-V, the Host sFlow
agent can also provide detailed visibility into inter-VM traffic by
configuring the vSwitch to export standard sFlow metrics:
http://blog.sflow.com/2010/10/sflowtrend-adds-server-performance.html
http://blog.sflow.com/2012/03/windows-server-8-beta.html
The sFlow metrics from the vSwitches are identical to those you would
get from most vendor's physical switches, giving you end-to-end
visibility:
http://blog.sflow.com/2012/09/vendor-support.html
On Thu, Feb 14, 2013 at 3:42 AM, Parakkal, Navin S
<navin.parakkal(a)hp.com> wrote:
Hi,
Is this not supported for Xen ? I get something like the below for Xen+ssh .
libvir: error : this function is not supported by the connection driver:
virNodeGetCPUStats
libvir: error : this function is not supported by the connection driver:
virNodeGetMemoryStats
Regards,
Navin
-----Original Message-----
From: Eric Blake [mailto:eblake@redhat.com]
Sent: Wednesday, February 13, 2013 7:17 PM
To: Parakkal, Navin S
Cc: libvir-list(a)redhat.com; libvirt-users(a)redhat.com
Subject: Re: [libvirt-users] Host information from libvirt KVM/Xen
[no need to mail both libvir-list and libvirt-users; the former is more for development
efforts, and since this is a usage question, it is sufficient to mail just libvirt-users]
On 02/13/2013 12:50 AM, Parakkal, Navin S wrote:
> Hi,
> I'm able to get the CPU utilization metrics from libvirt for the guests
(VM's) remotely . Is it possible to get the Host Cpu stat's through libvirt ?
> I didn't find any information regarding the host cpu cycles and memory
utilization to collect them remotely. Libvirt is installed on all the hosts.
You want to use the virNodeGetCPUStats() and virNodeGetMemoryStats() APIs. In virsh,
these are wrapped under 'nodecpustats' and 'nodememstats'.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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