#/bin/bash

if [ -z $ ] || [ -z $ ] || [ -z $ ] || [ -z $ ] || [ -z $ ];

then

        echo "*****Input the necessary parameters: CONTAINERID IP MASK GATEWAY ETHNAME"

        echo "*****Call the script like: sh manual_con_static_ip.sh  b0e18b6a4432 192.168.5.123 24 192.168.5.1 deth0"

        exit

fi

CONTAINERID=$

SETIP=$

SETMASK=$

GATEWAY=$

ETHNAME=$

#判断宿主机网卡是否存在

ifconfig $ETHNAME > /dev/null >&

if [ $? -eq  ]; then

    read -p "$ETHNAME exist,do you want delelte it? y/n " del

    if [[ $del == 'y' ]]; then

    ip link del $ETHNAME

    else

    exit

    fi

fi

#

pid=`docker inspect -f '{{.State.Pid}}' $CONTAINERID`

mkdir -p /var/run/netns

find -L /var/run/netns -type l -delete

if [ -f /var/run/netns/$pid ]; then

    rm -f /var/run/netns/$pid

fi

ln -s /proc/$pid/ns/net /var/run/netns/$pid

#

ip link add $ETHNAME type veth peer name B

brctl addif br3 $ETHNAME

ip link set $ETHNAME up

ip link set B netns $pid

#先删除容器内已存在的eth0

ip netns exec $pid ip link del eth0 > /dev/null >&

#设置容器新的网卡eth0

ip netns exec $pid ip link set dev B name eth0

ip netns exec $pid ip link set eth0 up

ip netns exec $pid ip addr add $SETIP/$SETMASK dev eth0

ip netns exec $pid ip route add default via $GATEWAY