Service monitoring on sensor to GDP gateways
The hosts doing gatewaying of sensor data into the GDP need some sort of service monitoring. Ideally it would check to see if the sensors are generating data as well as whether the data is being properly transferred into the GDP.
In particular, it isn't clear that mqtt-gdp-gateway instances are being restarted as necessary. I thought this was a
systemd function, but it doesn't seem to be working reliably.