Re: [Xen-users] can one do traffic accounting on bridged domU's?

[Thomas Goirand <thomas@xxxxxxxxxx>]

Simon Hobson wrote:
> Rudi Ahlers wrote:
> 
>> I'm just wondering, is it possible to setup the dom0 to perform
>> traffic account of domU's, which are setup using bridge mode networking?
> 
> Depends on what you want to do.
> 
> If logging traffic in/out of the real interfaces by IP address is
> enough, then that's reasonably easy to do - though it won't log traffic
> between Dom0 and DomU or between DomU's on the same box. Doing it
> strictly by virtual interface will be a bit more work as the list of
> interfaces will keep changing.

Well, that's not so hard to perform. Here's a quick example, taken from
our stable version of dtc-xen:

http://git.gplhost.com/gitweb/?p=dtc-xen.git;a=blob;f=panel/graph/xenupdate.py;h=c1eb90f49871a66817cc841155b43f69b993021b;hb=f78e9f8f48920b1ceb39d3ad4b68f3cb5f015633

This sends CPU, IO and Network usage to some RRDs. Here's the graphing
for the network part:

http://git.gplhost.com/gitweb/?p=dtc-xen.git;a=blob;f=panel/graph/xennetgraph.py;h=53a31be86956fd0f538ead6948988d633b53f00b;hb=f78e9f8f48920b1ceb39d3ad4b68f3cb5f015633

These 2 scripts are of course to set in a cron job. Note that on our
system, all domU are called xenXX, feel free to adapt to your needs.

On our next version of dtc-xen, it saves the values, that are fetched
using SOAP, and then stored on our management server. That's of course
harder to read / use right away.

Thomas

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