etcdctl是一个提供简洁命令的etcd客户端，使用etcdctl可以直接和etcd服务打交道，对etcd中的键值对进行增删改查。
下载地址：etcdctl工具
tar -xzvf etcd-xxx-linux-amd64.tar.gz
cd etcd-xxx-linux-amd64
cp etcdctl /usr/local/bin/
$ etcdctl -h
NAME:
etcdctl - A simple command line client for etcd.WARNING:
Environment variable ETCDCTL_API is not set; defaults to etcdctl v2.
Set environment variable ETCDCTL_API=3 to use v3 API or ETCDCTL_API=2 to use v2 API.USAGE:
etcdctl [global options] command [command options] [arguments...]VERSION:
3.3.10
使用etcdctl v3版本，需要设置环境变量ETCDCTL_API=3
使用方法：export ETCDCTL_API=3或在etcdctl命令前加ETCDCTL_API=3
| 命令 | 说明 |
|---|---|
| etcdctl --endpoints=$ENDPOINTS put foo "Hello World" | 将{key:foo, value: Hello World!}的键值对写入etcd |
| etcdctl --endpoints=$ENDPOINTS get foo | 查找etcd key为foo对应的value |
| etcdctl --endpoints=$ENDPOINTS delete foo | 删除key为foo的键值对 |
原文：https://www.cnblogs.com/Moon-Light-Dream/p/10946619.html