DNS metrics from DoH/DoT

PowerDNS Recursor supports Metrics

eg.

# rec_control get all-outqueries
19859

or long output:

rec_control get-all

Supports an internal webserver , that primary use is for API, but can export metrics in json

PowerDNS is behind nginx (proxypass) so we do not have remote clients, privacy plus !

# rec_control top-remotes
Over last 10000 entries:
100.00%	127.0.0.1

0.00%	rest

also can export & send metrics to a carbon server (graphite style) or to Metronome