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

cmd/controller-manager/app/options/options.go

@@ -82,6 +82,9 @@ type KubeSphereControllerManagerOptions struct {
 	// * has the lowest priority.
 	//     e.g. *,-foo, means "disable 'foo'"
 	ControllerGates []string
+
+	// Enable gops or not.
+	GOPSEnabled bool
 }
 
 func NewKubeSphereControllerManagerOptions() *KubeSphereControllerManagerOptions {
@@ -144,6 +147,9 @@ func (s *KubeSphereControllerManagerOptions) Flags(allControllerNameSelectors []
 		"named 'foo', '-foo' disables the controller named 'foo'.\nAll controllers: %s",
 		strings.Join(allControllerNameSelectors, ", ")))
 
+	gfs.BoolVar(&s.GOPSEnabled, "gops", s.GOPSEnabled, "Whether to enable gops or not.  When enabled this option, "+
+		"controller-manager will listen on a random port on 127.0.0.1, then you can use the gops tool to list and diagnose the controller-manager currently running.")
+
 	kfs := fss.FlagSet("klog")
 	local := flag.NewFlagSet("klog", flag.ExitOnError)
 	klog.InitFlags(local)

cmd/controller-manager/app/server.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/google/gops/agent"
 	"github.com/spf13/cobra"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
@@ -79,6 +80,15 @@ func NewControllerManagerCommand() *cobra.Command {
 				klog.Error(utilerrors.NewAggregate(errs))
 				os.Exit(1)
 			}
+
+			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)
+				}
+			}
+
 			if err = Run(s, controllerconfig.WatchConfigChange(), signals.SetupSignalHandler()); err != nil {
 				klog.Error(err)
 				os.Exit(1)