Taken from https://github.com/kumina/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.
To install this code and in your go environment. You can then add the binary to your PATH.
go get github.com/kumina/unbound_exporter
go install github.com/kumina/unbound_exporter
To show all CLI flags available
unbound_exporter -h
For extended statistics, you may want to add the following to your unbound.conf
# statistics
extended-statistics: yes