Influxdb2 and Grafana

Proxmox VE sends the data over UDP, so the influxdb server has to be configured for this.

Proxmox is using UDP (Influx V1 compatible) Install Telegraf Socket listener plugin

https://hub.docker.com/_/telegraf

echo "my_measurement,my_tag_key=my_tag_value value=1" | nc -u -4 -w 1 docker-host 3522

Most dashboards are written to support Influx v1 (SQL like queries).