ip link add br0 type bridge # ip link delete br0
ip link set br0 up # ip link set br0 down
ip link set eth0 master br0 # ip link set eth0 nomaster
nspid=$(docker inspect -f '{{.State.Pid}}' ubuntu)
mkdir -p /var/run/netns/
ln -s /proc/${nspid}/ns/net /var/run/netns/${nspid}
ip link add vnet-n type veth peer name vnet-w