Prometheus Unbound exporter

This repository provides code for a simple Prometheus metrics exporter for the Unbound DNS resolver. This exporter connects to Unbounds TLS control socket and sends the stats_noreset command, causing Unbound to return metrics as key-value pairs. The metrics exporter converts Unbound metric names to Prometheus metric names and labels by using a set of regular expressions.

Please refer to this utility's main() function for a list of supported command line flags.

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Building

To build this code, you'll need a working go environment. Once you have a suitable environment, simply run the following commands

go get
go build unbound_exporter.go

If your build is working successfully, you should see the following output.

./unbound_exporter -h
Usage of ./unbound_exporter:
  -unbound.ca string
    Unbound server certificate. (default "/etc/unbound/unbound_server.pem")
  -unbound.cert string
    Unbound client certificate. (default "/etc/unbound/unbound_control.pem")
  -unbound.host string
    Unbound control socket hostname and port number. (default "localhost:8953")
  -unbound.key string
    Unbound client key. (default "/etc/unbound/unbound_control.key")
  -web.listen-address string
    Address to listen on for web interface and telemetry. (default ":9167")
  -web.telemetry-path string
    Path under which to expose metrics. (default "/metrics")