etcdv3出错

你的Endpoints写错了，localhost不是loca lhost

请检查下etcd的版本；如果是docker，默认镜像好像是v2，用etcdctl看看。

使用git clone项目，然后自己docker build的镜像是最新的。

我的docker启动命令，使用自己build的镜像，和go代码例子。

docker run -d --restart=always -p 2379:2379 -p 2380:2380 -v /data/docker/etcd/node1:/node1.etcd -e ETCD_NAME=node1 -e ETCD_ADVERTISE_CLIENT_URLS=http://0.0.0.0:2379 -e ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 etcd

package main

import (
    "log"
    "time"
    "context"

    "github.com/coreos/etcd/client"
)

func main() {
    cfg := client.Config{
        Endpoints:               []string{"http://127.0.0.1:2379"},
        Transport:               client.DefaultTransport,
        // set timeout per request to fail fast when the target endpoint is unavailable
        HeaderTimeoutPerRequest: time.Second,
    }
    c, err := client.New(cfg)
    if err != nil {
        log.Fatal(err)
    }
    kapi := client.NewKeysAPI(c)
    // set "/foo" key with "bar" value
    log.Print("Setting '/foo' key with 'bar' value")
    resp, err := kapi.Set(context.Background(), "/foo", "bar", nil)
    if err != nil {
        log.Fatal(err)
    } else {
        // print common key info
        log.Printf("Set is done. Metadata is %q\n", resp)
    }
    // get "/foo" key's value
    log.Print("Getting '/foo' key value")
    resp, err = kapi.Get(context.Background(), "/foo", nil)
    if err != nil {
        log.Fatal(err)
    } else {
        // print common key info
        log.Printf("Get is done. Metadata is %q\n", resp)
        // print value
        log.Printf("%q key has %q value\n", resp.Node.Key, resp.Node.Value)
    }
}