Ytdyklly

Try this:

virsh net-list

virsh net-dhcp-leases <net-name>   <--- net-name from above command

You can also use following form if you know the MAC address:

virsh net-dhcp-leases <net-name> --mac <mac-address>

The MAC address can be found from dumpxml command. 
See Is there a way to determine which virtual interface belongs to a virtual machine in a kvm host?

list for vms:

virsh list

get vm MAC from name

virsh domiflist debian8

do the scan of your vm subnet with grep (MAC must be capitalized)

nmap -sP 10.0.0.0/24 | grep 52:54:00:FD:1F:92 -B 3 

result

Nmap scan report for 10.0.0.173

Host is up (0.0012s latency).

MAC Address: 52:54:00:FD:1F:92 (QEMU Virtual NIC)

If you have console access to the VM then just run ifconfig -a on the guest. While you are there, check to make sure that the guest does have network connectivity and that sshd is running.

If you have not console access, then chances are the IP address was assigned by DHCP. Look for another machine that is also getting a DHCP assignment, maybe the host server, and then add 1 to the address and try it. In fact, try the next 5 or 6 addresses. If that doesn't work, then you either have a large active network and will need to try every IP address in the subnet, or there is a lower level network problem like no route to host or two hosts with the same MAC address. Or maybe you just didn't get sshd running.

Using the console is the easiest way to solve this problem.

To see the IP address of your VM/s just run:

$ arp -n

If arp isn't installed on your system just install the net-tools package.

It's possible to connect through builtin VNC with virt-manager, and you do tty login, find the ip address with ifconfig eth0. Normally eth0, unless you've specified otherwise.

sudo nmap -sn 192.168.5.0/24 | awk '/Nmap scan report/{printf $5;printf " ";getline;getline;print $3;}' | fgrep -if <(virsh list --name | grep . | while read n; do virsh domiflist $n; done | grep --only-matching ..:..:..:..:..:..)

Scan subnet. Parse the output with awk to get lines like <IP> <MAC>. Then grep in them using a list of the MACs of the VMs.

The list of the MACs is obtained by listing all of the VMs (also strip empty lines), then doing virsh domiflist for each of them, and then grepping for a pattern that looks like a MAC.

Sources:

https://serverfault.com/a/669862/284568

I guess this is an old question, but the current versions of virsh make this a lot easier if you're using a nat or bridged private network. I have a machine - steak - on a (routed) private network:

sauer@helium:~> sudo virsh list

 Id    Name                           State

----------------------------------------------------

 21    steak                          running



sauer@helium:~> sudo virsh domifaddr steak

 Name       MAC address          Protocol     Address

-------------------------------------------------------------------------------

 vnet0      76:0c:28:ab:0e:ee    ipv4         10.14.1.1/24

On another machine, I have a system (unifi) which is bridged to the regular network. Libvirt doesn't assign it an address; it gets an address from my network DHCP server, which also updates dynamic DNS in my case. So, you basically have to find the address like it's any other machine - finding it in the arp table is probably the easiest -- which means ip neighbour now, as arp is deprecated and no longer present on some distributions. Luckily for those of us who don't spell things with extrae vouwels, you can also use shorter versions, like ip neigh and ip n (or ip neighbor). ;)

sauer@helium:~$ sudo virsh domifaddr unifi

 Name       MAC address          Protocol     Address

-------------------------------------------------------------------------------



sauer@helium:~$ sudo virsh domiflist unifi

Interface  Type       Source     Model       MAC

-------------------------------------------------------

vnet0      bridge     br0        virtio      52:54:00:2c:ac:ee



sauer@helium:~$ ip neigh | grep -i 52:54:00:2c:ac:ee

192.168.0.226 dev br0 lladdr 52:54:00:2c:ac:ee REACHABLE

sauer@helium:~$ host unifi

unifi.home.domain.com has address 192.168.0.226

(While you seem too advanced for such a simple answer)

Will

$ ifconfig

work?

If you have QEMU(VM emulator) go to "i" button and check the network card associated with "Br0" network. Take a note of the mac address of the NIC. Now Login to your VM -> Open Terminal -> type: "ifconfig" command in the terminal -> take a note of IP address associated with the the Mac address that you have noted earlier.

You can login to your VM using Putty or any ssh client using the IP you have noted in the last step.

I have my KVM guests on br0 interface so I think its a bit different, but here is my two scripts I made.

Note to use ARP you first need to have the MAC in your Arp Table. Therefor its best to use fping to do a quick ping of entire network (takes like 2 seconds). This makes sure your Arp cache is up to date.

apt-get install fping

yum install fping

Find a single guest IP via :

cat << 'EOF' > ~/findip.sh

#!/bin/bash

#FreeSoftwareServers.com



echo "Finding All Active IP's in Network via single Ping"

sleep 2s



fping -a -g 192.168.1.0/24

#nmap -sn 192.168.1.0/24



echo "Please Enter the Exact Name of the VM Guest:"



read guestname



arp -na | awk -v mac=$(virsh domiflist $guestname | awk '$2=="bridge"{print $NF}') '$0 ~ " at " mac {gsub("[()]", "", $2); print $2}'

EOF

chmod +x ~/findip.sh

sudo sh -c 'echo "alias findguestip=~/findip.sh" >> ~/.bashrc'

source ~/.bashrc

findguestip

Find All Guest IP's via:

cat << 'EOF' > ~/findallips.sh

#!/bin/bash

#FreeSoftwareServers.com



echo "Finding All Active IP's in Network via single Ping"

sleep 2s



fping -a -g 192.168.1.0/24

#nmap -sn 192.168.1.0/24



domainlog=/tmp/domain.log



virsh list --all | grep running |  cut -c 8- >> "$domainlog"



sed -i 's/running*//g' "$domainlog"



readarray domain < "$domainlog"



for i in "${domain[@]}"

do

ip="$(arp -na | awk -v mac=$(virsh domiflist $i | awk '$2=="bridge"{print $NF}') '$0 ~ " at " mac {gsub("[()]", "", $2); print $2}')"

echo "Hostname : $i IP : $ip"

done

rm "$domainlog"

EOF

chmod +x ~/findallips.sh

sudo sh -c 'echo "alias findallips=~/findallips.sh" >> ~/.bashrc'

source ~/.bashrc

findallips

I wrote a get-vm-ip script (available at 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'

1. 
   

   Get your domain list by virsh list --all

   
   
   

   virsh # list --all
   
   
   
   2     webserver_01                   running
   
   

   
   


2. 
   

   Get your domain interface list by domain id or name using virsh domiflist yourDomainId, and you will see the MAC ADDRESS of the domain's interface.

   
   
   

   virsh # domiflist 2
   
   
   
   bridge     br0        virtio      52:54:00:42:be:96
   
   

   
   


3. 
   

   Using nmap scan your LAN by nmap -sn 192.168.1.0/24|grep -i '52:54:00:42:be:96' -B 2, you will get the IP ADDRESS.

   
   
   

   [root@kvm-master ~]# nmap -sn 192.168.1.0/24|grep -i '52:54:00:42:be:96' -B2 
   
   
   
   Nmap scan report for bogon (192.168.1.210)
   
   Host is up (0.00013s latency).
   
   MAC Address: 52:54:00:42:BE:96 (QEMU Virtual NIC)
   
   

   
   

A nice solution which use the qemu-guest agent.

a)Configure your vm to use qemu-guest agent
On host: Add with virt-manager a "qemu-guest-agent" channel
Is really easy.In my case machine is called "Debian",and xml after modify will be similar to this.

 <channel type='unix'>

      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-3-debian/org.qemu.guest_agent.0'/>

      <target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>

      <alias name='channel1'/>

      <address type='virtio-serial' controller='0' bus='0' port='2'/>

    </channel>

b)On guest install qemu-guest-agent and ensure is started

apt -y install qemu-guest-agent



systemctl status qemu-guest-agent.service

● qemu-guest-agent.service - LSB: QEMU Guest Agent startup script

   Loaded: loaded (/etc/init.d/qemu-guest-agent; generated; vendor preset: enabled)

   Active: active (running) since Sat 2019-01-26 09:35:57 CET; 3s ago

     Docs: man:systemd-sysv-generator(8)

  Process: 1624 ExecStop=/etc/init.d/qemu-guest-agent stop (code=exited, status=0/SUCCESS)

  Process: 1630 ExecStart=/etc/init.d/qemu-guest-agent start (code=exited, status=0/SUCCESS)

    Tasks: 1 (limit: 4915)

   CGroup: /system.slice/qemu-guest-agent.service

           └─1638 /usr/sbin/qemu-ga --daemonize -m virtio-serial -p /dev/virtio-ports/org.qemu.guest_agent.0

c)Finally this nice pipe will return the ip,instead of NAMEOFVMNIC put eth0,enp1s0,etc..

virsh domifaddr  --domain yourvmname --source agent|grep -w NAMEOFVMNIC|egrep -o '([[:digit:]]{1,3}.){3}[[:digit:]]{1,3}'