Simon,
Ganglia 3.2+ can collect and display sFlow metrics:
http://blog.sflow.com/2012/01/using-ganglia-to-monitor-virtual.html
You can monitor the virtual machines by installing Host sFlow agents
(http://host-sflow.sourceforge.net/ ) on the hypervisors. The sFlow agents
export libvirt metrics using the sFlow protocol. Currently, Host sFlow supports
KVM, Xen and Hyper-V.
Cheers,
Peter
On Jun 18, 2012, at 2:50 PM, Simon G. wrote:
> Hello,
>
> Is there any way to use Ganglia to monitor virtual machines? Right now I'd
> like to get data from libvirt's api (CPU usage, IO, Network etc), but I don't
> want to reinvent the wheel and I'd like to use already mature tools to do
> that, for example Ganglia. I know collectd has plugins which support libvirt,
> but from what I've read, ganglia could be better solution.
>
> 1st question is: how can I monitor virtual machines in Ganglia. Especially
> using libvirt, but later also Xen, VMware, Hyper-V. Is it possible? Can
> ganglia monitor virtual machines? What can I monitor without additional agent
> on guest and what can I monitor with such agent?
> 2nd question: I've just found out gmetad-python, but before I'll try to use
> it I'd like to ask about possibilities to use python scripts to collect data
> from gmond. What is the easiest way to do that?
>
> I'm interested in python, because I'd like to try create simple Openstack and
> Ganglia proof of concept. I was going to use existing simple monitoring
> around libvirt from openstack and implement storing data in RRD files, but as
> I've mentioned above, I don't want to reinvent the wheel and I think a better
> way is to integrate already existing solutions. The question is how to
> integrate those two projects. My first step is to run gmond on each host,
> collect data from it via python script, save those data into RRD file and use
> this data in Openstack's environment. If gmetad-python can do that, it's
> great. Then second step will be to get that data from gmetad-python (via
> python script) and use it in Openstack's environment.
>
> Cheers,
> --
> Simon
>
>
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