Serverstatus (Hardwarestate)

Hi,
i looking for a way to connect my serverstat to the openhab system

Usecase:
Message if OVERTEMP/ LOW SPACE ON DISK/ Updates Availible/ System on USV/ …
In case of Overtemp aktivate AirCon,

My system is an OMV with OH in a Docker (and Docker for MQTT) on a Debian system (not the OMV image)

Can somebody giv me a TIP were i can find a way. If i searce on Google i find 1000 of ways to Install bit nut what i need