uncloud/ucloud/network/create-tap.sh

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#!/bin/sh
if [ $# -ne 2 ]; then
echo "$0 tapid dev"
echo "f.g. $0 100 br100"
echo "Missing arguments" >&2
exit 1
fi
tapid=$1; shift
bridge=$1; shift
vxlan=vxlan${tapid}
tap=tap${tapid}
if ! ip link show $tap > /dev/null 2> /dev/null; then
ip tuntap add $tap mode tap user `whoami`
ip link set $tap up
sleep 0.5s
ip link set $tap master $bridge
fi
echo $tap