first

Author: cmaster11

.gitignore

@@ -0,0 +1 @@
+.idea

go.mod

@@ -0,0 +1,8 @@
+module k8s-event-watcher
+
+go 1.13
+
+require (
+	k8s.io/api v0.0.0-20190620084959-7cf5895f2711
+	k8s.io/client-go v0.0.0-20190620085101-78d2af792bab
+)

go.sum

@@ -0,0 +1,89 @@
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main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"time"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes"
+	_ "k8s.io/client-go/plugin/pkg/client/auth"
+	"k8s.io/client-go/tools/cache"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+func main() {
+	kubeConfigPath := flag.String("kubeconfig", "", "path of k8s config file to use")
+
+	flag.Parse()
+
+	config, err := clientcmd.BuildConfigFromFlags("", *kubeConfigPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	clientSet, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("started")
+
+	kubeInformerFactory := informers.NewSharedInformerFactory(clientSet, time.Second*30)
+	evtInformer := kubeInformerFactory.Core().V1().Events().Informer()
+
+	evtInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
+		AddFunc: onAddEvent,
+	}, )
+
+	stop := make(chan struct{})
+	defer close(stop)
+
+	go kubeInformerFactory.Start(stop)
+	for {
+		time.Sleep(time.Second)
+	}
+}
+
+func onAddEvent(obj interface{})  {
+	evt, ok := obj.(*v1.Event)
+	if !ok {
+		log.Printf("failed to cast event: %+v\n", obj)
+		return
+	}
+
+	log.Printf("new event: :%+v\n", evt)
+}