python批量导出导入mysql用户的方法

数据库迁移(a -> b),需要把用户也迁移过去,而用户表(mysql.user)有上百个用户。有2种方法进行快速迁移:1,在同版本的条件下,直接备份a服务器的mysql数据库,还原到b服务器。2,要是不同版本的数据(5.1 -> 5.5),很可能mysql数据库下面的一些表结构,甚至表数据的默认值都不一样,按照1的方法进行迁移,虽然最后也是可以正常访问,但是还是有些不太放心,很可能会影响到了b服务器上的mysql,这样就需要用命令行来生成帐号了,这样是最安全和放心的。下面用python脚本来进行批量导出:

代码如下:

#!/bin/env python# -*- encoding: utf-8 -*-#—————————————–# name: mysql_user_dump.py# purpose: 批量导出用户# author: zhoujy# created: 2013-05-28#—————————————–import mysqldb

def get_data(conn): query = ‘select user,host from mysql.user order by user’ cursor = conn.cursor() cursor.execute(query) lines = cursor.fetchall() return lines

def output_data(conn,rows): for user,host in rows: query = “show grants for ‘%s’@’%s'” %(user,host) cursor = conn.cursor() cursor.execute(query) show_pri = cursor.fetchall() for grants_command in show_pri: print ”.join(grants_command)+’;’ print ”

if __name__ ==’__main__’: conn = mysqldb.connect(host=’localhost’,user=’root’,passwd=’123456′,db=’mysql’,port=3306,charset=’utf8′) rows = get_data(conn) output_data(conn,rows)

运行:python mysql_user_dump.py

代码如下:

grant replication slave on *.* to ‘rep’@’192.168.234.%’ identified by password ‘*6bb4837eb74329105ee4568dda7dc67ed2ca2ad9’;

grant all privileges on *.* to ‘root’@’localhost’ identified by password ‘*6bb4837eb74329105ee4568dda7dc67ed2ca2ad9’ with grant option;

grant all privileges on *.* to ‘root’@’192.168.234.%’ identified by password ‘*6bb4837eb74329105ee4568dda7dc67ed2ca2ad9’;

grant usage on *.* to ‘test’@’192.168.234.%’ identified by password ‘*2a032f7c5ba932872f0f045e0cf6b53cf702f2c5’;grant select, insert, update, delete on `test`.* to ‘test’@’192.168.234.%’;

grant usage on *.* to ‘zzz_test’@’192.168.234.%’ identified by password ‘*2a032f7c5ba932872f0f045e0cf6b53cf702f2c5’;grant select, insert, update, delete on `zzz%`.* to ‘zzz_test’@’192.168.234.%’;

最后把这些命令在b上面执行就好了,也可以在执行脚本的时候重定向到一个sql文件:如:user.sql,在到b服务器的数据库里面执行source user.sql 就完成了导入工作。第2个方法最好,不需要1里面的删表和重建表的操作,最安全。