Pi-hole stats for Telegraf

This repository contains a small bash script that extract a few metrics from Pi-hole admin api. Combined with telegraf, those metrics can be outputed to a database like InfluxDB and visualized in graphing tools like Grafana.

Requirements

• Pi-hole: It has only been tested in Pi-hole v4.0. It may require some adjustments in another versions
• curl for requesting the api
• jq to parse, extract and build the JSON for telegraf
• sed to perform transfromations on datatypes to make them compatible with influxdb

Installation

• Copy the file piholestats.sh to /usr/local/bin. Make sure it has execution permission (may require chmod +x).
• Edit the file /etc/telegraf/telegraf.conf and paste the content below:
• (optional) import the example grafana.json dashboard

# PiHole monitoring
[[inputs.exec]]
    commands = ["/usr/local/bin/piholestats.sh"]
    timeout = "10s"
    data_format = "json"
    name_suffix = "_pihole"

Measurement name is exec_pihole.