ovsconf

#!/bin/bash

: ${DEVNAME:=$1}

if [ -z "$DEVNAME" ]; then
    DEVNAME=$(ip route | awk '$1=="default" {print $5}' | head -1)
    if [ -z "$DEVNAME" ]; then
        echo "Default route could not be found." && exit -1
    fi
    GATEWAYIP=$(ip route | awk '$1=="default" {print $3}')
else
    if [ -n "$(ip route | grep default | grep $DEVNAME)" ]; then
        GATEWAYIP=$(ip route | awk '$1=="default" {print $3}')
    fi
fi

if [ "$DEVNAME" = "daolinet" ]; then
    echo "You already setup daolinet." && exit -1
fi

ip link show $DEVNAME 1> /dev/null
[ "$?" -eq 0 ] || exit -1

DEVMAC=$(ip link show $DEVNAME | grep 'link/ether' | awk '{print $2}')
DEVIP=$(ip addr show $DEVNAME | awk '$1=="inet" {print $2}'| head -1)

systemctl stop NetworkManager
systemctl disable NetworkManager
ovs-vsctl add-br daolinet
ip link set daolinet up
ovs-vsctl add-port daolinet $DEVNAME
ip addr del $DEVIP dev $DEVNAME
ip addr change $DEVIP dev daolinet
ovs-vsctl set Bridge daolinet other_config:hwaddr="$DEVMAC"

if [ -n "$GATEWAYIP" ]; then
    ip route add default via $GATEWAYIP
fi