以上就是MySQL如何优雅的备份账号相关信息的详细内容

本篇文章介绍了三种导出数据库用户信息的方案，每种方案都给出了脚本并进行演示。同时 这三种方案稍加以封装都可以作为备份数据库用户权限的脚本。可能你还有其他方案，如：pt-show-grants等，欢迎分享出来哦，也欢迎大家收藏或者改造成更适合自己的脚本，说不定什么时候就会用到哦 特别是一个实例有好多用户时，你会发现脚本更好用哈。

总结：
#exclude-databases排除数据库 --users指定导出用户 exclude-users排除哪些用户 #还可以增加 --add-drop-user 参数 生成drop user语句#若数据库开启了GTID 导出时必须加上 --set-gtid-purged=OFFmysqlpump -uroot -proot --exclude-databases=% --users --exclude-users=mysql.session,mysql.sys > /tmp/user.sql #导出的结果-- Dump created by MySQL pump utility, version: 5.7.23, linux-glibc2.12 (x86_64)-- Dump start time: Fri Apr 19 15:03:02 2019-- Server version: 5.7.23 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;SET @OLD_SQL_MODE=@@SQL_MODE;SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";SET @@SESSION.SQL_LOG_BIN= 0;SET @OLD_TIME_ZONE=@@TIME_ZONE;SET TIME_ZONE='+00:00';SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT;SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS;SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION;SET NAMES utf8mb4;CREATE USER 'read'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*2158DEFBE7B6FC24585930DF63794A2A44F22736' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT UNLOCK;GRANT SELECT ON *.* TO 'read'@'%';CREATE USER 'root'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT UNLOCK;GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;CREATE USER 'test'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT UNLOCK;GRANT USAGE ON *.* TO 'test'@'%';GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER, EXECUTE, CREATE VIEW, SHOW VIEW ON `test_db`.* TO 'test'@'%';CREATE USER 'test_user'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*8A447777509932F0ED07ADB033562027D95A0F17' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT UNLOCK;GRANT USAGE ON *.* TO 'test_user'@'%';GRANT SELECT, INSERT, UPDATE, DELETE ON `test_db`.`t1` TO 'test_user'@'%';SET TIME_ZONE=@OLD_TIME_ZONE;SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT;SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS;SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION;SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;SET SQL_MODE=@OLD_SQL_MODE;-- Dump end time: Fri Apr 19 15:03:02 2019 #可以看出 导出结果只包含创建用户及赋权的语句 十分好用#mysqlpump详细用法可参考：https://dev.mysql.com/doc/refman/5.7/en/mysqlpump.html

mysqlpump是mysqldump的一个衍生，也是MySQL逻辑备份的工具。mysqlpump可用的选项更多，可以直接导出创建用户的语句及赋权的语句。下面我们来演示下：

3.mysqlpump直接导出用户
#导出权限脚本#!/bin/bash #Function export user privileges  pwd=root expgrants() {  mysql -B -u'root' -p${pwd} -N $@ -e "SELECT CONCAT( 'SHOW GRANTS FOR ''', user, '''@''', host, ''';' ) AS query FROM mysql.user" | \ mysql -u'root' -p${pwd} $@ | \ sed 's/\(GRANT .*\)/\1;/;s/^\(Grants for .*\)/--  /;/--/{x;p;x;}'}   expgrants > /tmp/grants.sqlecho "flush privileges;" >> /tmp/grants.sql #执行脚本后结果-- Grants for read@% GRANT SELECT ON *.* TO 'read'@'%'; -- Grants for root@% GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION; -- Grants for test@% GRANT USAGE ON *.* TO 'test'@'%';GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER, EXECUTE, CREATE VIEW, SHOW VIEW ON `test_db`.* TO 'test'@'%'; -- Grants for test_user@% GRANT USAGE ON *.* TO 'test_user'@'%';GRANT SELECT, INSERT, UPDATE, DELETE ON `test_db`.`t1` TO 'test_user'@'%'; -- Grants for mysql.session@localhost GRANT SUPER ON *.* TO 'mysql.session'@'localhost';GRANT SELECT ON `performance_schema`.* TO 'mysql.session'@'localhost';GRANT SELECT ON `mysql`.`user` TO 'mysql.session'@'localhost'; -- Grants for mysql.sys@localhost GRANT USAGE ON *.* TO 'mysql.sys'@'localhost';GRANT TRIGGER ON `sys`.* TO 'mysql.sys'@'localhost';GRANT SELECT ON `sys`.`sys_config` TO 'mysql.sys'@'localhost';

然后通过脚本导出用户权限：

SELECT    CONCAT(        'create user \'',  user,  '\'@\'',  Host,  '\''  ' IDENTIFIED BY PASSWORD \'',  authentication_string,        '\';'    ) AS CreateUserQueryFROM    mysql.`user`WHERE    `User` NOT IN (        'mysql.session',        'mysql.sys'    );     #结果 在新实例执行后可以创建出相同密码的用户mysql> SELECT  -> CONCAT(  -> 'create user \'',  ->   user,  ->   '\'@\'',  ->   Host,  ->   '\''  ->   ' IDENTIFIED BY PASSWORD \'',  ->   authentication_string,  -> '\';'  -> ) AS CreateUserQuery  -> FROM  -> mysql.`user`  -> WHERE  -> `User` NOT IN (  -> 'mysql.session',  -> 'mysql.sys'  -> );+-------------------------------------------------------------------------------------------------+| CreateUserQuery                                         |+-------------------------------------------------------------------------------------------------+| create user 'root'@'%' IDENTIFIED BY PASSWORD '*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B';   || create user 'test'@'%' IDENTIFIED BY PASSWORD '*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29';   || create user 'read'@'%' IDENTIFIED BY PASSWORD '*2158DEFBE7B6FC24585930DF63794A2A44F22736';   || create user 'test_user'@'%' IDENTIFIED BY PASSWORD '*8A447777509932F0ED07ADB033562027D95A0F17'; |+-------------------------------------------------------------------------------------------------+4 rows in set (0.00 sec)

首先拼接出创建用户的语句：

2.自定义脚本导出
#只导出mysql库中的user，db，tables_priv表数据 #如果你有针队column的赋权 可以再导出columns_priv表数据#若数据库开启了GTID 导出时最好加上 --set-gtid-purged=OFFmysqldump -uroot -proot mysql user db tables_priv -t --skip-extended-insert > /tmp/user_info.sql #导出的具体信息---- Dumping data for table `user`-- LOCK TABLES `user` WRITE;/*!40000 ALTER TABLE `user` DISABLE KEYS */;INSERT INTO `user` VALUES ('%','root','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B','N','2019-03-06 03:03:15',NULL,'N');INSERT INTO `user` VALUES ('localhost','mysql.session','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','Y','N','N','N','N','N','N','N','N','N','N','N','N','N','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE','N','2019-03-06 02:57:40',NULL,'Y');INSERT INTO `user` VALUES ('localhost','mysql.sys','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE','N','2019-03-06 02:57:40',NULL,'Y');INSERT INTO `user` VALUES ('%','test','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29','N','2019-04-19 06:24:54',NULL,'N');INSERT INTO `user` VALUES ('%','read','Y','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*2158DEFBE7B6FC24585930DF63794A2A44F22736','N','2019-04-19 06:27:45',NULL,'N');INSERT INTO `user` VALUES ('%','test_user','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','',_binary '',_binary '',_binary '',0,0,0,0,'mysql_native_password','*8A447777509932F0ED07ADB033562027D95A0F17','N','2019-04-19 06:29:38',NULL,'N');/*!40000 ALTER TABLE `user` ENABLE KEYS */;UNLOCK TABLES; ---- Dumping data for table `db`-- LOCK TABLES `db` WRITE;/*!40000 ALTER TABLE `db` DISABLE KEYS */;INSERT INTO `db` VALUES ('localhost','performance_schema','mysql.session','Y','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N');INSERT INTO `db` VALUES ('localhost','sys','mysql.sys','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','Y');INSERT INTO `db` VALUES ('%','test_db','test','Y','Y','Y','Y','Y','Y','N','N','N','Y','N','N','Y','Y','N','N','Y','N','N');/*!40000 ALTER TABLE `db` ENABLE KEYS */;UNLOCK TABLES; ---- Dumping data for table `tables_priv`-- LOCK TABLES `tables_priv` WRITE;/*!40000 ALTER TABLE `tables_priv` DISABLE KEYS */;INSERT INTO `tables_priv` VALUES ('localhost','mysql','mysql.session','user','boot@connecting host','0000-00-00 00:00:00','Select','');INSERT INTO `tables_priv` VALUES ('localhost','sys','mysql.sys','sys_config','root@localhost','2019-03-06 02:57:40','Select','');INSERT INTO `tables_priv` VALUES ('%','test_db','test_user','t1','root@localhost','0000-00-00 00:00:00','Select,Insert,Update,Delete','');/*!40000 ALTER TABLE `tables_priv` ENABLE KEYS */;UNLOCK TABLES; #在新的实例插入所需数据 就可以创建出相同的用户及权限了

我们知道，数据库用户密码及权限相关信息保存在系统库mysql 里面。采用mysqldump可以将相关表数据导出来 如果有迁移用户的需求 我们可以按照需求在另外的实例中插入这些数据。下面我们来演示下：

1.mysqldump逻辑导出用户相关信息