func PrometheusCollectorOption(handlerName string) ServeOption {
return func(_ *core.IpfsNode, _ net.Listener, mux *http.ServeMux) (*http.ServeMux, error) {
childMux := http.NewServeMux()
mux.HandleFunc("/", prom.InstrumentHandler(handlerName, childMux))
return childMux, nil
}
}
func ExampleInstrumentHandler() {
// Handle the "/doc" endpoint with the standard http.FileServer handler.
// By wrapping the handler with InstrumentHandler, request count,
// request and response sizes, and request latency are automatically
// exported to Prometheus, partitioned by HTTP status code and method
// and by the handler name (here "fileserver").
http.Handle("/doc", prometheus.InstrumentHandler(
"fileserver", http.FileServer(http.Dir("/usr/share/doc")),
))
// The Prometheus handler still has to be registered to handle the
// "/metrics" endpoint. The handler returned by prometheus.Handler() is
// already instrumented - with "prometheus" as the handler name. In this
// example, we want the handler name to be "metrics", so we instrument
// the uninstrumented Prometheus handler ourselves.
http.Handle("/metrics", prometheus.InstrumentHandler(
"metrics", prometheus.UninstrumentedHandler(),
))
}