Merge pull request #828 from j4ckstraw/fix-pprof

fix: fix pprof by using DefaultServeMux

Author: k8s-ci-robot

Diff for: pkg/exporters/k8sexporter/k8s_exporter.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"net"
 	"net/http"
-	_ "net/http/pprof"
+	"net/http/pprof"
 	"strconv"
 
 	"k8s.io/klog/v2"
@@ -95,6 +95,13 @@ func (ke *k8sExporter) startHTTPReporting(npdo *options.NodeProblemDetectorOptio
 		util.ReturnHTTPJson(w, ke.conditionManager.GetConditions())
 	})
 
+	// register pprof
+	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)
+
 	addr := net.JoinHostPort(npdo.ServerAddress, strconv.Itoa(npdo.ServerPort))
 	go func() {
 		err := http.ListenAndServe(addr, mux)