#!/bin/sh

BRIDGE=br0
DOCKER_PID=`ps -ef | grep docker | grep -v grep |  awk '{print $2}'`
DOCKER_IMAGE="centos_sshd"
IP_ADDRESSES=("10.102.0.10/24" "10.102.0.10/24" "10.102.0.11/24" "10.102.0.11/24")

rm -f ./netconfig.env
mkdir -p /var/run/netns/

for i in `seq 1 ${#IP_ADDRESSES[@]}`; do
  let address_index=$i-1
  CONTAINER_ID=`docker run --hostname="container${i}" --net="none" -i -t -d ${DOCKER_IMAGE} /bin/bash`
  BASH_PID=`docker inspect --format {{.State.Pid}} ${CONTAINER_ID}`

  ln -s /proc/${BASH_PID}/ns/net /var/run/netns/${BASH_PID}

  ip link add veth${i}-1 type veth peer name veth${i}-2
  ip link set veth${i}-1 up
  ip link set veth${i}-2 netns ${BASH_PID}
  ip netns exec ${BASH_PID} ip link set veth${i}-2 up
  ip netns exec ${BASH_PID} ip addr add ${IP_ADDRESSES[${address_index}]} dev veth${i}-2

  #ovs-vsctl add-port ${BRIDGE} veth${i}-1

  hwaddr=`ip netns exec ${BASH_PID} ifconfig | grep veth | awk '{print $5}'`
  ipaddr=`echo "${IP_ADDRESSES[${address_index}]}" | awk -F/ '{print $1}'`
  netmask=`echo "${IP_ADDRESSES[${address_index}]}" | awk -F/ '{print $2}'`
  echo "veth${i}-2 ${IP_ADDRESSES[${address_index}]} ${hwaddr}"
  echo "export mac_veth${i}2=${hwaddr}" >> ./netconfig.env
  echo "export ip_veth${i}2=${ipaddr}" >> ./netconfig.env
  echo "export netmask_veth${i}2=${netmask}" >> ./netconfig.env
done