In my local network I use several RPi's and one of them runs Node-RED. Although I have found solutions to show system information like CPU temperature from the RPi on which Node-RED is installed, I want to monitor the other RPi's too.
Google did not help me, is anyone experienced with this and willing to advice or link?
If you want to monitor other system metrics as well, then Telegraf might be worth looking into.
There is an MQTT output, so you don't have to necessarily use it with InfluxDB (or any database). I am using this setup for some (virtual) machines where I am just interested in some nice live visualization with the Dashboard.