Use client-go to create/generate/publish an Event object in Kuberentes

main.go

package main

import (
	"flag"
	"path/filepath"

	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/rest"
	"k8s.io/client-go/tools/clientcmd"
	"k8s.io/client-go/util/homedir"
	"k8s.io/klog/v2"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes/scheme"
	typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
	"k8s.io/client-go/tools/record"
)

func main() {

	var kubeconfig *string
	if home := homedir.HomeDir(); home != "" {
		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
	} else {
		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
	}
	flag.Parse()

	// use the current context in kubeconfig
	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
	if err != nil {
		// use InClusterConfig
		config, err = rest.InClusterConfig()
		if err != nil {
			klog.Fatal(err)
		}
	}

	// creates the clientset
	clientset, err := kubernetes.NewForConfig(config)
	if err != nil {
		klog.Fatal(err)
	}

	// create an EventRecorder
	eventBroadcaster := record.NewBroadcaster()
	eventBroadcaster.StartLogging(klog.Infof)
	eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{Interface: clientset.CoreV1().Events("")})
	eventRecorder := eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "By Able"})

	// send an Event to default namespace
	object := &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "default"}}
	eventRecorder.Event(object, v1.EventTypeNormal, "ReasonTest", "MessageTest")

	// send an Event to kube-public namespace
	object = &v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "kube-public"}}
	eventRecorder.Event(object, v1.EventTypeNormal, "ReasonTest", "MessageTest")

	// Wait forever
	select {}
}