package main

import (
	"context"
	"fmt"
	"go.etcd.io/etcd/client/v3"
	"time"
)

func main() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   []string{"43.143.245.135:2379"},
		DialTimeout: 5 * time.Second,
	})
	if err != nil {
		//handle error!
		fmt.Println("connect etcd server failed,error:", err)
	}
	defer cli.Close()
	//watch
	//派一个哨兵监视wangao这个key的变化（新增修改删除）
	watchchannel := cli.Watch(context.Background(), "wangao")
	//从通道中尝试取值（监视的信息）
	for wresp := range watchchannel {
		for _, evt := range wresp.Events {
			fmt.Printf("Type:%v key:%v value:%v\n", evt.Type, string(evt.Kv.Key), string(evt.Kv.Value))
		}
	}

}