nshack.sh

#!/bin/bash
# And now we cry because --network-interface on systemd-nspawn is broken. :(

set -e

NAME="$1"
shift

for retry in {1..5}; do
    if machinectl status "$NAME" &>/dev/null; then
        break
    else
        sleep 0.1
    fi
done
LEADER=$(machinectl show "$NAME" --property=Leader)
PID="${LEADER#Leader=}"

echo "Moving interfaces to net namespace of $NAME ($PID): $*"
for IF in "$@"; do
    ip link set dev "$IF" netns "$PID"
done