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.
Add this to your Cargo.toml:
toml
[dependencies]
prometheus_exporter = "0.1"
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 use std::net::SocketAddr;
let addr: SocketAddr = "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.