[one-users] network traffic monitor for KVM guests

[Rogier Mars]

Hi,

I just noticed this post and did some checking with libvirt. I am able  
to get the interface that is used in a KVM vm via the dumpxml command,  
and then get the network interface statistics via domifstat (see the  
example below). I think this could be included in the one_vmm_kvm.rb  
script. I'm not a ruby programmer, but I think this should be possible.

Cheers,

Rogier


virsh # dumpxml one-60
<domain type='kvm' id='11'>
   <name>one-60</name>
   <uuid>3e62f716-b9bc-4b3e-6af6-7121181a5487</uuid>
   <memory>524288</memory>
   <currentMemory>524288</currentMemory>
   <vcpu>2</vcpu>
   <os>
     <type arch='x86_64' machine='pc'>hvm</type>
     <boot dev='hd'/>
   </os>
   <features>
     <acpi/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
   <on_reboot>restart</on_reboot>
   <on_crash>destroy</on_crash>
   <devices>
     <emulator>/usr/bin/kvm</emulator>
     <disk type='file' device='disk'>
       <source file='/srv/cloud/one/var/60/images/disk.0'/>
       <target dev='hda' bus='ide'/>
     </disk>
     <interface type='bridge'>
       <mac address='00:03:5d:bc:f9:64'/>
       <source bridge='br1'/>
       <target dev='vnet1'/>
     </interface>
   </devices>
</domain>

virsh # domifstat one-60 vnet1
vnet1 rx_bytes 517120841
vnet1 rx_packets 6065654
vnet1 rx_errs 0
vnet1 rx_drop 0
vnet1 tx_bytes 189675090
vnet1 tx_packets 1166682
vnet1 tx_errs 0
vnet1 tx_drop 0

virsh #


On Jan 7, 2010, at 10:52 AM, Javier Fontan wrote:

> Hello,
>
>
> Hello,
>
> Libvirt does not directly provide this information so it is always 0
> for kvm drivers. Maybe the driver could be improved to get network
> traffic by other means. Do you have any idea on how this could be
> done?
>
> Bye
>
> On Wed, Dec 30, 2009 at 10:18 PM, Shi Jin <jinzishuai at gmail.com>  
> wrote:
>> Hi there,
>>
>> I noticed that the "onevm show -x" command returns 0 in the XML  
>> output
>>  <CPU>0</CPU>
>>  <NET_TX>0</NET_TX>
>>  <NET_RX>0</NET_RX>
>> for all KVM virtual machine. I am not sure whether it is the same  
>> for Xen.
>>
>> Could you please comment on the possibility of monitor network  
>> traffic
>> for individual VM in OpenNebula?
>> I know that the "onehost show" command actually reports the traffic
>> for each host but what is really interesting is to know exactly how
>> much traffic used by each VM.
>>
>> Thank you very much and Happy New Year to All!
>>
>> --
>> Shi Jin, Ph.D.
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>
>
>
> -- 
> Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
> DSA Research Group: http://dsa-research.org
> Globus GridWay Metascheduler: http://www.GridWay.org
> OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>