wait for network-online.target before starting
mosquitto will crash if the network isn't fully up.
2024-11-10T10:57:24: Warning: Interface eth0 does not support IPv4 configuration.
Aug 07 17:31:00 xxx systemd[1]: Starting Mosquitto MQTT Broker daemon... Aug 07 17:31:00 xxx systemd[1]: mosquitto.service: Main process exited, code=exited, status=1/FAILURE