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#!/bin/bash
set -e
NETDEV="$1"
CONTAINER="$2"
die () {
status="$1"
shift
warn "$@"
exit "$status"
}
DOCKER_PID=$(docker inspect --format='{{ .State.Pid }}' $2)
[ ! -d /var/run/netns ] && mkdir -p /var/run/netns
rm -f "/var/run/netns/$DOCKER_PID"
ln -s "/proc/$DOCKER_PID/ns/net" "/var/run/netns/$DOCKER_PID"
[ "$DOCKERPID" = 0 ] && {
die 1 "Docker inspect returned invalid PID 0"
}
[ "$DOCKERPID" = "<no value>" ] && {
die 1 "Container $GUESTNAME not found, and unknown to Docker."
}
ip link set "$NETDEV" netns "$DOCKER_PID"
ip netns exec "$DOCKER_PID" sethdlc "$NETDEV" fr lmi none
ip netns exec "$DOCKER_PID" ip link set "$NETDEV" up
rm -f "/var/run/netns/$DOCKER_PID"
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