etcdctl命令详解

[root@localhost92 ~]$etcdctl --help
NAME:
   etcdctl - A simple command line client for etcd. #一个简单的etcd命令行客户端

USAGE:
   etcdctl [global options/全局选项] command [command options/命令选项] [arguments/参数...]

VERSION:
   3.0.17

COMMANDS:
     backup          backup an etcd directory #备份etcd目录
     cluster-health  check the health of the etcd cluster #检查etcd群集的运行状况
     mk              make a new key with a given value #用给定值生成新密钥
     mkdir           make a new directory #创建一个新目录
     rm              remove a key or a directory  #删除密钥或目录
     rmdir           removes the key if it is an empty directory or a key-value pair #如果密钥是空目录或键值对，则将其删除
     get             retrieve the value of a key #检索密钥的值
     ls              retrieve a directory #检索目录
     set             set the value of a key #设置键的值
     setdir          create a new directory or update an existing directory TTL #创建新目录或更新现有目录TTL
     update          update an existing key with a given value #用给定值更新现有密钥
     updatedir       update an existing directory #更新现有目录
     watch           watch a key for changes #监控秘钥变化
     exec-watch      watch a key for changes and exec an executable #监视密钥的更改并执行可执行文件
     member          member add, remove and list subcommands #成员添加、删除和列出子命令
     import          import a snapshot to a cluster #将快照导入群集
     user            user add, grant and revoke subcommands #用户添加、授予和撤消子命令
     role            role add, grant and revoke subcommands #角色添加、授予和撤消子命令
     auth            overall auth controls #总体验证控件

GLOBAL OPTIONS:
   --debug                          output cURL commands which can be used to reproduce the request #输出cURL命令，用于重新生成请求
   --no-sync                        don't synchronize cluster information before sending request #发送请求前不同步群集信息
   --output simple, -o simple       output response in the given format (simple, `extended` or `json`) (default: "simple") #以给定格式输出响应（simple，`extended`或`json`）（默认值：“simple”）
   --discovery-srv value, -D value  domain name to query for SRV records describing cluster endpoints #要查询描述群集终结点的SRV记录的域名
   --insecure-discovery             accept insecure SRV records describing cluster endpoints #接受描述群集终结点的不安全SRV记录
   --peers value, -C value          DEPRECATED - "--endpoints" should be used instead #已弃用
   --endpoint value                 DEPRECATED - "--endpoints" should be used instead #已弃用
   --endpoints value                a comma-delimited list of machine addresses in the cluster (default: "http://127.0.0.1:2379,http://127.0.0.1:4001") #群集中以逗号分隔的计算机地址列表
   --cert-file value                identify HTTPS client using this SSL certificate file #使用此SSL证书文件标识HTTPS客户端
   --key-file value                 identify HTTPS client using this SSL key file #使用此SSL密钥文件标识HTTPS客户端
   --ca-file value                  verify certificates of HTTPS-enabled servers using this CA bundle #使用此CA包验证启用HTTPS的服务器的证书
   --username value, -u value       provide username[:password] and prompt if password is not supplied. #提供用户名[：password]并在未提供密码时提示。
   --timeout value                  connection timeout per request (default: 1s) #每个请求的连接超时（默认值：1s）
   --total-timeout value            timeout for the command execution (except watch) (default: 5s) 命令执行超时（监视除外）（默认值：5s）
   --help, -h                       show help
   --version, -v                    print the version