Podman API pprof endpoint

pprof.go

// setupPprof enables pprof default endpoints
// Note: These endpoints and the podman flag --cpu-profile are mutually exclusive
//
// Examples:
// #1 go tool pprof -http localhost:8889 localhost:8888/debug/pprof/heap?seconds=120
// Note: web page will only render after a sample has been recorded
// #2 curl http://localhost:8888/debug/pprof/heap > heap.pprof && go tool pprof heap.pprof
func (s *APIServer) setupPprof() {
	if s.PProfAddr == "" {
		return
	}

	logrus.Infof("pprof service listening on %q", s.PProfAddr)
	go func() {
		old := runtime.SetMutexProfileFraction(1)
		defer runtime.SetMutexProfileFraction(old)

		runtime.SetBlockProfileRate(1)
		defer runtime.SetBlockProfileRate(0)

		router := mux.NewRouter()
		router.PathPrefix("/debug/pprof/").HandlerFunc(pprof.Index)

		err := http.ListenAndServe(s.PProfAddr, router)
		if err != nil && err != http.ErrServerClosed {
			logrus.Warnf("pprof service failed: %v", err)
		}
	}()
}