add gops agent to ks-apiserver&&controller-manager

cmd/ks-apiserver/app/options/options.go

@@ -62,6 +62,9 @@ type ServerRunOptions struct {
 
 	//
 	DebugMode bool
+
+	// Enable gops or not.
+	GOPSEnabled bool
 }
 
 func NewServerRunOptions() *ServerRunOptions {
@@ -76,6 +79,8 @@ func NewServerRunOptions() *ServerRunOptions {
 func (s *ServerRunOptions) Flags() (fss cliflag.NamedFlagSets) {
 	fs := fss.FlagSet("generic")
 	fs.BoolVar(&s.DebugMode, "debug", false, "Don't enable this if you don't know what it means.")
+	fs.BoolVar(&s.GOPSEnabled, "gops", false, "Whether to enable gops or not. When enabled this option, "+
+		"ks-apiserver will listen on a random port on 127.0.0.1, then you can use the gops tool to list and diagnose the ks-apiserver currently running.")
 	s.GenericServerRunOptions.AddFlags(fs, s.GenericServerRunOptions)
 	s.KubernetesOptions.AddFlags(fss.FlagSet("kubernetes"), s.KubernetesOptions)
 	s.AuthenticationOptions.AddFlags(fss.FlagSet("authentication"), s.AuthenticationOptions)

cmd/ks-apiserver/app/server.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"net/http"
 
+	"github.com/google/gops/agent"
 	"github.com/spf13/cobra"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	cliflag "k8s.io/component-base/cli/flag"
@@ -57,6 +58,15 @@ cluster's shared state through which all other components interact.`,
 			if errs := s.Validate(); len(errs) != 0 {
 				return utilerrors.NewAggregate(errs)
 			}
+
+			if s.GOPSEnabled {
+				// Add agent to report additional information such as the current stack trace, Go version, memory stats, etc.
+				// Bind to a random port on address 127.0.0.1.
+				if err := agent.Listen(agent.Options{}); err != nil {
+					klog.Fatal(err)
+				}
+			}
+
 			return Run(s, apiserverconfig.WatchConfigChange(), signals.SetupSignalHandler())
 		},
 		SilenceUsage: true,