Node Exporter for FreshTomato

This is a tweaked version of openWRTs prometheus-node-exporter-lua designed for FreshTomato devices. Only the prometheus-collectors that were specific to openWRT have been removed. I have added a temperature collector to return the device and wireless temperatures. You could probably add more collectors to display wireless metrics.

NOTE: This has only been tested on a Linksys EA6700 device.

Usage

You need to setup and install Entware on your FreshTomato router.

Then install the required packages:

opkg install lua luac luasocket

The sub directories in the files folder will then need to be copied over to your router, into the Entware folder /opt.

To execute node exporter until restart run:

/opt/bin/lua /opt/bin/prometheus-node-exporter-lua --bind 192.168.1.254 --port 9100 &

FreshTomato does not have a service manager. If you want to execute node exporter on router boot you will need to use an .automount file placed in the /opt folder.

Example /opt/exporter.autorun:

#!/bin/sh

sleep 5
/opt/bin/lua /opt/bin/prometheus-node-exporter-lua --bind 192.168.1.254 --port 9100 &

Depending on the router, when .automount executes it does not guarantee that the device is ready so you should include a short sleep before executing node exporter.