Ejabberd metrics for Prometheus

Compile:

erlc mod_prometheus.erl

Copy compiled file to ejabberd, for example:

cp mod_prometheus.beam /opt/ejabberd-17.07/lib/ejabberd-17.07/ebin/

Add config to ejabberd.yml:

listen:
  -
    port: 8181
    module: ejabberd_http
    request_handlers:
      "/metrics": mod_prometheus

After this, restart ejabberd and try open http://localhost:8181/metrics
in browser. You have to see metrics for prometheus.

Service will responde all requests independently request type
and request path.