[libvirt-users] list mac or IP of all guests NICs?

[Josiah Ritchie]

Thanks Justin and Osier. I had searched for a leases file on the machine
before, but couldn't find it so thank you for pointing that out. I had
thought about installing nmap, but figured I had to have some better record
on the machine itself.

Thanks also for the tip on Rich's blog post. I found it at
http://rwmj.wordpress.com/2010/10/26/tip-find-the-ip-address-of-a-virtual-machine/

JSR/

On Tue, Jan 18, 2011 at 4:01 AM, Osier Yang <jyang at redhat.com> wrote:

> 于 2011年01月18日 04:45, Josiah Ritchie 写道:
>
>  I'm trying to figure out how to use virsh (or something else) to list
>> all the IP addresses (or MAC addresses if needed) for each virtual NIC,
>> preferably with it domain affiliation also listed.
>>
>> Is this possible?
>>
>>
> == method 1: (simple but not reliable)
> # cat /var/lib/dnsmasq/dnsmasq.leases
> 1295343272 52:54:00:6f:2e:72 192.168.122.118 * *
>
> == method 2:
> # This script is to map MAC into IP, accepts two
> # arguments, subnet prefix and MAC address of the
> # interface.
> #! /bin/bash
>
> if [ $# -ne 2 ]; then
>    echo "Usage: $(basename $0) <SUBNET> <MAC>"
>    exit 1
> fi
>
> SUBNET=$1
> MAC=$2
>
> rpm -q nmap > /dev/NULL
> if [ $? -ne 0 ]; then
>    echo "You need install nmap"
>    exit 1
> fi
>
> if [[ -n $SUBNET ]]; then
>   OUTPUT=$(nmap -sP -n $SUBNET | grep -i -B 2 $MAC)
>   if [[ -n $OUTPUT ]]; then
>      IP=$(echo $OUTPUT | sed -e 's/.*
> \([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\).*/\1/')
>   fi
> fi
>
> echo $IP
>
> e.g. for a guest which use libvirt "default" network, get the subnet
> like:
> # ip route | grep "virbr0" | sed -n 1p | awk '{print $1}'
>
> you could write automate script to parse the MAC address of domain
> interfaces, the bridge name, and the subnet prefix of bridge, and
> then use the script above the get the IP.
>
> And as Justin said, Rich has more clever tool to do it, I also forgot,
> you can wait him, :-)
>
> Regards
> Osier
>
>  JSR/
>>
>>
>>
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>
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