pyroscope-io/hotrod-golang

hotrod golang

Hot R.O.D. - Rides on Demand

The project is a fork of https://github.com/jaegertracing/jaeger/tree/master/examples/hotrod. All the credits go to the authors.

We use the application in examples of how Pyroscope server pulls profiling data from remote targets.

Enable pprof endpoints

The only change we made is enabling pprof endpoints – see main.go:

func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/debug/pprof/", pprof.Index)
	mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
	mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
	mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
	mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
	go func() {
		log.Println(http.ListenAndServe(":6060", mux))
	}()

	cmd.Execute()
}

Note that pprof package can also register endpoints globally:

package main

import (
	"fmt"
	"net/http"
	_ "net/http/pprof"
)

func main() {
	// Server for pprof.
	go func() {
		fmt.Println(http.ListenAndServe(":6060", nil))
	}()

	// Your code.
}

Please, refer to pprof package documentation and diagnostics guide to learn more.