#!/bin/bash
set -e
IFACE=$1
# vm<vm_id>.<num>

CLUSTER=$(curl -s -H 'X-Wit-Auth: true' http://10.0.0.1:4000/get-by-iface/${IFACE} | sed 's/"//g' | awk '{print $1}')

if ! [[ $CLUSTER =~ ^[0-9]+$ ]]; then
    echo "CLUSTER seems not to be valid"
    exit 10
fi

LOOPBACKIP=$(dig a +short $HOSTNAME)
BRIDGE=br${CLUSTER}
VXLAN=vxlan${CLUSTER}
VNI=${CLUSTER}

ip link set up ${IFACE}

if ! ip link show dev ${VXLAN} &>/dev/null; then 
    ip link add ${VXLAN} type vxlan id ${VNI} dstport 4789 local ${LOOPBACKIP} nolearning
    ip link set up ${VXLAN}
fi

if ! ip link show dev ${BRIDGE} &>/dev/null; then 
    brctl addbr ${BRIDGE}
    brctl stp ${BRIDGE} off
    brctl addif ${BRIDGE} ${VXLAN} 
    ip link set up dev ${BRIDGE}
    bridge vlan del dev ${BRIDGE} vid 1 self
    echo 1 >/sys/class/net/${BRIDGE}/bridge/vlan_filtering
fi

brctl addif ${BRIDGE} ${IFACE}