SNMP is a standard way to get raw data from devices, for monitoring purposes. With this package, you can hook your UNRAID server up to a monitor, and track things like network usage, cpu activity, even user logins.
https://raw.githubusercontent.com/coppit/unraid-snmp/master/snmp.plg
I recommend installing zukhov's Observium docker container. It can then track your server's status. See the Observium website for some idea of what it might look like. Here's an example pic.
The plugin