I've been reading the vGPU wiki and the instructions for other linux os don't seem too hard. I'll give it a shot and report back.
EDIT: You need a corporate email to sign up
So I used this as an example and added a container just running node_exporter. I've attached a screen shot of how it looks like, but this is the config I added to the prometheus.yml file. You'll just need to change the `unraid-local` to the address of your unraid server.
- job_name: 'node-exporter'
static_configs:
- targets: ['unraid-local:9100']