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Stable names for multiple network interfaces in GNU/Linux VM on Hyper-V
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| # /etc/udev/rules.d/70-hvnetdev.rules | |
| SUBSYSTEM=="net", ACTION=="add", PROGRAM=="/etc/udev/hvnetdev_program", NAME="$result" |
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| #!/bin/bash | |
| # /etc/udev/hvnetdev_map | |
| # the names are inspired by OpenBSD (on Hyper-V) | |
| # call hvnetdev_program --list and compare with Get-VMNetworkAdapter -VMName <name> (PowerShell) to create the map | |
| hvnetdev_map['56b619fe-c897-4306-af0b-ed1e53acb47a']='hvn0' | |
| hvnetdev_map['f3a0a6a6-14eb-4b07-8732-51762015f1bf']='hvn1' | |
| hvnetdev_map['246753d2-6a7f-4d2d-aa3a-2ea173b49c2d']='hvn2' | |
| hvnetdev_map['d0c1b0f0-7373-4ea9-a0ee-9b514e6436a8']='hvn3' | |
| hvnetdev_map['56804368-d379-433d-86a7-7a369e10e67a']='hvn4' | |
| hvnetdev_map['689254ce-f7ab-4eb3-8045-bbec141db8b7']='hvn5' |
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| #!/bin/bash | |
| # /etc/udev/hvnetdev_program | |
| # we need to rename network devices since kernel names are not stable | |
| # @see: https://github.com/systemd/systemd/issues/8652 | |
| # @see: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=810247 | |
| # @see: https://wiki.debian.org/NetworkInterfaceNames | |
| set -euo pipefail | |
| if [[ "${1:-}" == '--list' || -z "${DEVPATH:-}" ]]; then | |
| while read -r _ kname _; do | |
| kname="${kname%:}" | |
| read -r _ mac_addr _ | |
| path="$( readlink -f "$( find -L /sys/bus/vmbus/drivers/hv_netvsc -mindepth 3 -maxdepth 3 -name "${kname}" 2> /dev/null )" )" | |
| uuid=${path%/*/*} | |
| uuid=${uuid##*/} | |
| printf '%s %s %s\n' "${kname}" "${mac_addr}" "${uuid}" | |
| done < <( ip link show | grep -EA1 '^[^[:space:]:]*:[[:space:]](eth|hvn)' | grep -v '^--' ) | |
| exit | |
| fi | |
| if [[ "${ACTION}" != "add" || "${SUBSYSTEM}" != "net" ]]; then | |
| exit 1 | |
| fi | |
| uuid=${DEVPATH%/*/*} | |
| uuid=${uuid##*/} | |
| if [[ ! -d /sys/bus/vmbus/drivers/hv_netvsc/${uuid}/net/${INTERFACE} ]]; then | |
| exit 1 | |
| fi | |
| declare -A hvnetdev_map | |
| . "${0%_program}_map" | |
| printf '%s\n' "${hvnetdev_map[${uuid}]}" |
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