delete-empty-nova-network-bridges.sh

#!/bin/bash

delete_empty_bridge() {
    for v in $(virsh list --all | tail -n +3 | head -n -1 | awk '{print $2}') ; do
        virsh dumpxml ${v}
    done | grep br${1} && return
    ip link delete vlan${1}
    ip link set down br${1}
    brctl delbr br${1}
}

brctl show
for b in $(brctl show | awk '/^br[0-9]/ {print $1}') ; do
    brctl show ${b} | grep -q vnet || delete_empty_bridge ${b:2}
done
brctl show