[one-users] network traffic monitor for KVM guests

[Rogier Mars]

Hi Shi Jin,

Thanks.

You can also get the info via /proc/net/dev :) which is basically all  
the same. As long as you know which interface belongs to which vm.

cheers,

rogier
On May 18, 2010, at 7:53 AM, Shi Jin wrote:

> Hi Rogier,
>
> There is another way to get network traffic: ifconfig vnet1.
>
> For example:
> $ virsh domifstat one-529 vnet4
> vnet4 rx_bytes 70136914
> vnet4 rx_packets 528585
> vnet4 rx_errs 0
> vnet4 rx_drop 0
> vnet4 tx_bytes 57902688
> vnet4 tx_packets 299616
> vnet4 tx_errs 0
> vnet4 tx_drop 0
>
> $ ifconfig vnet4
> vnet4     Link encap:Ethernet  HWaddr 1A:F2:E9:43:73:3D
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:299616 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:528585 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:500
>          RX bytes:57902688 (55.2 MiB)  TX bytes:70136914 (66.8 MiB)
>
> They provide the same information.
>
> Shi
> On Tue, May 11, 2010 at 5:23 PM, Rogier Mars <rogier at fortytwo.nl>  
> wrote:
>> 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
>>>
>>
>>
>
>
>
> -- 
> Shi Jin, Ph.D.
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
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