[CentOS-virt] Extract ip address from a kvm guest

Sat Apr 23 18:09:34 UTC 2011
Akemi Yagi <amyagi at gmail.com>

On Sat, Apr 23, 2011 at 10:46 AM, carlopmart <carlopmart at gmail.com> wrote:
> On 04/23/2011 07:32 PM, Mark Pryor wrote:

>> --- On Sat, 4/23/11, carlopmart<carlopmart at gmail.com>  wrote:

>>>    Somebody knows how can I extract/know an ip address
>>> used by a kvm

>>> etc)?? I don't use a dhcp or dns server on this network.
>>
>> If you have an http server on the local network:
>>
>> Inside the VM guest:
>>
>> ------------ /etc/rc.local ------------
>> wget --spider http://192.168.1.1/favicon.ico?sl6bs?ga-p45
>> ------------ snip ---------
>>
>> where the web server is at 192.168.1.1, Virt host is ga-p45, and the VM guest is sl6bs.
>>
>> In the server logs I see:
>> $ sudo tail -n 175 /var/log/apache2/local_log | grep fav
>> 192.168.1.224 - - [23/Apr/2011:10:10:02 -0700] "HEAD /favicon.ico?lucidpv?ga-p45 HTTP/1.0" 200 296
>> 192.168.1.155 - - [23/Apr/2011:10:10:10 -0700] "HEAD /favicon.ico?centbs?ga-p45 HTTP/1.0" 200 296
>> 192.168.1.183 - - [23/Apr/2011:10:10:10 -0700] "HEAD /favicon.ico?sl6bs?ga-p45 HTTP/1.0" 200 296

> Interesting Mark, but I don't have a http server installed. And between
> kvm host and kvm guests exists a firewall. Then, I can¡t use ping,
> telnet or other tools ...
>
> I am searching some type of function inside libvirt that can says what
> ip address has one kvm guest ...

There was a thread on a similar question. One of the answers
(arpwatch) may be useful :

http://lists.centos.org/pipermail/centos/2010-July/096998.html

Akemi