Get IP address of KVM Guest vm

Question

Is there a way I can get the IP address of a KVM guest client using bash? I need to add this to a bash script to automate a process and part of it is needing to get the IP address of the VM and pass it into a variable.

I've seen multiple things online but none of them seem to work.

Any help or advice will be appreciated

KVM is just the kernel part of the virtualization stack. I'm assuming you're using libvirt and it is libvirt managing the networks? — Jonathon Reinhart, Oct 06 '17 at 11:41
That is correct, I am using libvirt and it is managing the networks — Rob Barnes, Oct 06 '17 at 11:42
ok so I tried the virsh domifaddr command but that didn't return any results. I'm missing something here, but not sure what. — Rob Barnes, Oct 10 '17 at 10:03
virsh domifaddr only returns DHCP leases for the named VM. It returns nothing if the VM is not running or has only static IPs. — Michael Hampton, Dec 13 '18 at 01:12

score 2 · Answer 1 · answered Dec 13 '18 at 00:33

2

I wrote a get-vm-ip script (which you can download from https://github.com/earlruby/create-vm/blob/master/get-vm-ip) which uses this to get the IP:

HOSTNAME=[your vm name]
MAC=$(virsh domiflist $HOSTNAME | awk '{ print $5 }' | tail -2 | head -1)
arp -a | grep $MAC | awk '{ print $2 }' | sed 's/[()]//g'

The virsh command gets the MAC address, the last line finds the IP address using arp.

answered Dec 13 '18 at 00:33

Earl Ruby

1,263
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`virsh -q` gets rid of the header stuff, so you can skip the `tail` and `head` stuff. – NickD Jul 16 '21 at 18:53

score 1 · Answer 2 · answered Oct 11 '17 at 08:08

1

#!/bin/bash

ip=$(for mac in `sudo virsh domiflist $buildname |grep -o -E "([0-9a-f]{2}:){5}([0-9a-f]{2})"` ; do sudo arp -e |grep $mac  |grep -o -P "^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" ; done)
#iphost="$ip   appliance"

echo $ip

answered Oct 11 '17 at 08:08

Rob Barnes

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Get IP address of KVM Guest vm

2 Answers2