Before you start adding all of that make sure you have customers like parent poster.

For example I monitor disk space, RAM, CPU and that’s it for external tooling.

If any of that goes above thresholds someone will log into the server and use windows or Linux tooling to check what is going on.

I mostly monitor services health check endpoints so http calls to our own services. If network is down or shoddy response times of the services.

So all in all not much of servers itself.