prometheus_exporter

Helper libary to export prometheus metrics using hyper.

It uses rust-prometheus for collecting and rendering the prometheus metrics and hyper for exposing the metrics through http.

The usage is pretty simple. First you register all your metrics with the provided macros:

rust let connection_state = register_int_gauge_vec!( vec![namespace, "tcp", "connection_state_total"].join("_"), "what state current tcp connections are in".to_string(), &["state"] ) .expect("can not create tcp_connection_state_closed metric");

That is also where the metric values get updated:

rust connection_state .with_label_values(&["closed"]) .set(1234);

After all the metrics are registerd and the updating is setup the exporter can be started: rust let addr = "0.0.0.0:19899".parse().expect("can not parse listen addr"); PrometheusExporter::run(addr);

This will block the thread it is executed in.

In the future the exporter will also provide a way to update the metrics when a new request comes in but that still needs to be implemented.