CAF ships a Prometheus scraper implementation that allows exposing metrics from
the actor system. User can create an instance of the scraper with the factory
The scraper is designed to work with an HTTP server.
A minimal example for starting an HTTP server (see HTTP experimental) at port 8081
that responds to GET requests on
/metrics could look like this:
auto server = net::http::with(sys) .accept(8081) .route("/metrics", net::prometheus::scraper(sys)) .start();
Usually, users can simply use the configuration options of the actor system to export metrics: Exporting Metrics to Prometheus. When setting these options, CAF uses this implementation to start the Prometheus server in the background.