package main

import (
	"context"
	"flag"
	"fmt"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/clientcmd"
	"k8s.io/client-go/util/homedir"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"path/filepath"
)

// 集群外初始化 client
// 需要集群的 kubeconfig 配置文件
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 {
		panic(err.Error())
	}

	// create the clientset
	clientSet, err := kubernetes.NewForConfig(config)
	if err != nil {
		panic(err.Error())
	}

	nodes, err := clientSet.CoreV1().Nodes().List(context.TODO(), metav1.ListOptions{})
	if err != nil {
		panic(err.Error())
	}
	pods, err := clientSet.CoreV1().Pods("").List(context.TODO(), metav1.ListOptions{})
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("There are %d pods in the cluster\n", len(pods.Items))
	for _, v := range pods.Items {
		fmt.Println(v.Name)
	}
	fmt.Println("===================================================================================================")
	for _, v := range nodes.Items {
		fmt.Println("========================================")
		fmt.Printf("node:%v ip:%v\n", v.Name, v.Status.Addresses[0].Address)
		for _, c := range v.Status.Conditions {
			fmt.Println("-----------------------------------------")
			fmt.Printf("message:%v\n", c.Message)
			fmt.Printf("status:%v\n", c.Status)
			fmt.Printf("type:%v\n", c.Type)
			fmt.Printf("reason:%v\n", c.Reason)
		}
	}

}