Function main

examples/gocollector/main.go:34–63

()

var addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.")

func main() {
	flag.Parse()

	// Create a new registry.
	reg := prometheus.NewRegistry()

	// Register metrics from GoCollector collecting statistics from the Go Runtime.
	// This enabled default, recommended metrics with the additional, recommended metric for
	// goroutine scheduling latencies histogram that is currently bit too expensive for default option.
	//
	// See the related GopherConUK talk to learn more: https://www.youtube.com/watch?v=18dyI_8VFa0
	reg.MustRegister(
		collectors.NewGoCollector(
			collectors.WithGoCollectorRuntimeMetrics(
				collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile("/sched/latencies:seconds")},
			),
		),
	)

	// Expose the registered metrics via HTTP.
	http.Handle("/metrics", promhttp.HandlerFor(
		reg,
		promhttp.HandlerOpts{
			// Opt into OpenMetrics to support exemplars.
			EnableOpenMetrics: true,
		},
	))
	fmt.Println("Hello world from new Go Collector!")
	log.Fatal(http.ListenAndServe(*addr, nil))
}