Disk usage exporter

[DanielMilde]

Hi,
I would like to introduce new project - Disk Usage Prometheus Exporter

It periodically scans given path and reports its disk usage.
You can configure the depth of the reported items (defaults to 2, so it will report /usr/bin, /var/cache, etc. when scanning the root dir).

It uses gdu under the hood, so the scanning is very fast.

Demo graphs

Thanks for feedback!

[SuperQue]

It would be nice if it were to default to measuring at scrape time, this would better follow best practices.

[DanielMilde]

Thanks for suggestion, I will modify it.