I have a new router that runs OpenWRT and it provides a Prometheus (Node) Exporter (written in Lua)

NOTE The prometheus-node-exporter-lua Exporter package is a 4KB (!) script

As I’m sure is a common experience for others, it’s great that there’s an Exporter and a wealth of metrics exposed by it. One problem is that there’s no guidance on how to use these metrics to construct useful PromQL queries and Alertmanager alerts.

I think it would be useful for Exporters to publish a Documentation endpoints (perhaps /docs to go along with /metrics) that would include such guidance.