#! /bin/bash
controller=""
switches=`sudo ovs-vsctl list-br`
function host2ip (){
   ip=`getent hosts $1 |  awk '{print $1}' | tail -n 1`
   echo $ip
}

url=""
for c in $controller; do
  url="$url tcp:`host2ip $c`:6633"
done
echo $url
for s in $switches; do
    echo "set switch $s controller $url"
    sudo ovs-vsctl set-controller $s $url
done