k8s-custom-controller/main.go at main · pispico/k8s-custom-controller · GitHub

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package main

import (
	"flag"
	"fmt"
	"path/filepath"
	"time"

	"k8s.io/client-go/informers"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/rest"
	"k8s.io/client-go/tools/clientcmd"
	"k8s.io/client-go/util/homedir"
)

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()

	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
	if err != nil {
		fmt.Printf("Error %s building config flags from local kubeconfig\n", err.Error())
		config, err = rest.InClusterConfig()
		if err != nil {
			fmt.Printf("Error %s getting incluster configuration\n", err.Error())
		}
	}

	clientset, err := kubernetes.NewForConfig(config)
	if err != nil {
		fmt.Printf("Error %s creating clientset\n", err.Error())
	}

	ch := make(chan struct{})
	informers := informers.NewSharedInformerFactory(clientset, 10*time.Minute)
	c := NewController(clientset, informers.Apps().V1().Deployments())
	informers.Start(ch)
	c.run(ch)

}