Prometheus DHCP Exporter

Intro

A Rust Prometheus exporter for dhcpd_pools. This tool exports the infmation provided by the dhcpd-pools utility in a format that Prometheus can understand. It's a Rust-only clone of this exporter: https://github.com/atonkyra/dhcp-stats-prometheus. There is really no need to rewrite this in Rust but I was looking for an excuse to write some Rust. The advantage is this tool does not have a dependency on Python and of course being Rust the memory and CPU footprint is minimal (which is always a good thing).

Prerequisites

• You need Rust to compile this code. Simply follow the instructions on Rust's website to install the toolchain.
• You need the dhcpd-pools tool. You can compile it yourself or get using your distro package manager. The tool must be in the PATH environment variable.

Compilation

To compile the latest master version:

git clone https://github.com/MindFlavor/prometheus_dhcp_exporter.git
cd prometheus_dhcp_exporter
cargo install --path .

If you want the latest release you can simply use:

cargo install prometheus_dhcp_exporter

Usage

Start the binary with -h to get the complete syntax. There are just two parameters though:

1. -v Verbose mode
2. -p <port> Specify an alternative port (the default is 9979).

Once started, the tool will listen on the specified port (or the default one, 9979, if not specified) and return a Prometheus valid response at the url /metrics. So to check if the tool is working properly simply browse the http://localhost:9979 (or whichever port you choose).

Now add the exporter to the Prometheus exporters as usual. I recommend to start it as a service.