hellt/brvirt

brvirt displays bridges and enclosed interfaces along with corresponding KVM Virtual Machines names and virsh domain ids.

About brvirt

brvirt displays bridges and enclosed interfaces along with corresponding KVM Virtual Machines names and virsh domain ids.

It answers one simple question: How to determine which virtual interface belongs to which virtual machine and what bridge it is in?"

Requirements

The script is compatible with python2.7 and python3+.

• brvirt uses virsh tool to list VM properties and virtual network interfaces. To install virsh use:

 # on Debian-based distros:
sudo apt-get install libvirt-bin

 # on RHEL based:
sudo yum install libvirt

• Apart from virsh, the script relies on tabulate python package to render console tables:

TABULATE_INSTALL=lib-only pip install tabulate

Usage

As simple as python brvirt.py will produce the following output which combines brctl and virsh domiflist commands output:

(brvirt) [root@leo ~]# python brvirt.py
+----------+---------------+-----------+-------------+--------------------+
| Bridge   | Interface     | VM name   | Domain ID   | Int. MAC address   |
|----------+---------------+-----------+-------------+--------------------|
| br0      | eno1          |           |             | 28:80:23:90:ea:28  |
|          | vnet0         | cobbler   | 8           | 52:54:00:5a:a9:2c  |
|          | vnet4         | nuage-dns | 4           | 52:54:00:db:45:92  |
| br1      | eno2          |           |             | 28:80:23:90:ea:29  |
|          | vnet1         | cobbler   | 8           | 52:54:00:9b:c2:dc  |
| br999    | eno2.999@eno2 |           |             | 28:80:23:90:ea:29  |
+----------+---------------+-----------+-------------+--------------------+