John Siu Blog

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[Unit]
Description=Publish %I as alias for %H via mdns (IPv4)

[Service]
Type=simple
ExecStart=/bin/bash -c "/home/js/.script/avahi-alias.sh 4 %I"
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target

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[Unit]
Description=Publish %I as alias for %H via mdns (IPv6)

[Service]
Type=simple
ExecStart=/bin/bash -c "/home/js/.script/avahi-alias.sh 6 %I"
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target

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#!/usr/bin/bash

ALIAS=$2
IP_VER=$1

MDNS_DOMAIN="vms.local"
HOSTNAME=$(hostname -s).$MDNS_DOMAIN

avahi_alias() {
	IP=$(avahi-resolve -$IP_VER -n $HOSTNAME | cut -f2)
	echo "IPv$IP_VER=$IP"
	if [ $IP != "127.0.0.1" ] && [ $IP != "::1" ]; then
		echo "Aliasing $ALIAS -> $IP."
		avahi-publish -a -R $ALIAS.$MDNS_DOMAIN $IP
	else
		echo "Exiting, local address is $IP."
		exit 1
	fi
}

avahi_alias

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systemctl enable --now avahi-alias4@<alias>.service

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systemctl enable --now avahi-alias6@<alias>.service