Sure, that's for XEN, but it's not very effective. I need graph the traffic for each VM, not the vif - the vifs tend to change on a reboot, and also reset with the stats.

How can I graph the traffic over a perioud of time, for any given IP address?

Cacti works well, for switches & routers, but I can't get Cacti to graph an individual VM on the server.

On Fri, Aug 8, 2008 at 3:34 PM, Karanbir Singh <mail-lists@karan.org> wrote:

Rudi Ahlers wrote:

Hi all

Can someone please tell me how to monitor each VM's traffic on a CentOS
5.2 server, running either Xen or OpenVZ? I need to bill my users for
the traffic they use, and would like to have a traffic usage graph for
each Xen / OpenVZ Virtual Machine on the server.

if you look at how xen sets up the Vif interfaces, you will note that its quite trivial. just watch the vif as you would an eth interface.
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Kind Regards
Rudi Ahlers