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概述

binlog2sql是一个Python开发开源的MySQL Binlog解析工具,能够将Binlog解析为原始的SQL,也支持将Binlog解析为回滚的SQL,去除主键的INSERT SQL,是DBA和运维人员数据恢复好帮手。

mysql闪回工具binlog2sql安装配置教程详解

一、安装配置

1.1 用途

  • 数据快速回滚(闪回)
  • 主从切换后新master丢数据的修复
  • 从binlog生成标准SQL,带来的衍生功能
  • 支持MySQL5.6,5.7

1.2 安装

shell> git clone https://github.com/danfengcao/binlog2sql.git && cd binlog2sql
shell> pip install -r requirements.txt

二、使用方法

2.1 使用前配置

2.1.1参数配置

[mysqld]
server_id = 1
log_bin = /var/log/mysql/mysql-bin.log
max_binlog_size = 1G
binlog_format = row
binlog_row_image = full

2.1.2 user需要的最小权限集合

select, super/replication client, replication slave

建议授权

GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 

权限说明

  • select:需要读取server端information_schema.COLUMNS表,获取表结构的元信息,拼接成可视化的sql语句
  • super/replication client:两个权限都可以,需要执行'SHOW MASTER STATUS', 获取server端的binlog列表
  • replication slave:通过BINLOG_DUMP协议获取binlog内容的权限

2.2 基本用法

2.2.1基本用法

解析出标准SQL

shell> python binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -t test3 test4 
--start-file='mysql-bin.000002'
"htmlcode">
shell> python binlog2sql.py --flashback -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -ttest3 
--start-file='mysql-bin.000002' --start-position=763 --stop-position=1147
"htmlcode">
test库tbl表原有数据
mysql> select * from tbl;
+----+--------+---------------------+
| id | name | addtime |
+----+--------+---------------------+
| 1 | 小赵 | 2016-12-10 00:04:33 |
| 2 | 小钱 | 2016-12-10 00:04:48 |
| 3 | 小孙 | 2016-12-13 20:25:00 |
| 4 | 小李 | 2016-12-12 00:00:00 |
+----+--------+---------------------+
rows in set (0.00 sec)
"htmlcode">
mysql> show master status;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000051 | 967 |
| mysql-bin.000052 | 965 |
+------------------+-----------+

最新的binlog文件是mysql-bin.000052,我们再定位误操作SQL的binlog位置。误操作人只能知道大致的误操作时间,我们根据大致时间过滤数据。

shell> python binlog2sql/binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -ttbl 
--start-file='mysql-bin.000052' --start-datetime='2016-12-13 20:25:00' --stop-datetime='2016-12-13
 20:30:00'
输出:
INSERT INTO `test`.`tbl`(`addtime`, `id`, `name`) VALUES ('2016-12-13 20:26:00', 4, '小李'); 
#start 317 end 487 time 2016-12-13 20:26:26
UPDATE `test`.`tbl` SET `addtime`='2016-12-12 00:00:00', `id`=4, `name`='小李' WHERE `addtime`='2016-12-13 20:26:00' AND `id`=4 AND `name`='小李' LIMIT 1; #start 514 end 701 time 2016-12-13 20:27:07
DELETE FROM `test`.`tbl` WHERE `addtime`='2016-12-10 00:04:33' AND `id`=1 AND `name`='小赵' LIMIT 1; #start 728 end 938 time 2016-12-13 20:28:05
DELETE FROM `test`.`tbl` WHERE `addtime`='2016-12-10 00:04:48' AND `id`=2 AND `name`='小钱' LIMIT 1; #start 728 end 938 time 2016-12-13 20:28:05
DELETE FROM `test`.`tbl` WHERE `addtime`='2016-12-13 20:25:00' AND `id`=3 AND `name`='小孙' LIMIT 1; #start 728 end 938 time 2016-12-13 20:28:05
DELETE FROM `test`.`tbl` WHERE `addtime`='2016-12-12 00:00:00' AND `id`=4 AND `name`='小李' LIMIT 1; #start 728 end 938 time 2016-12-13 20:28:05

3.我们得到了误操作sql的准确位置在728-938之间,再根据位置进一步过滤,使用flashback模式生成回滚sql,检查回滚sql是否正确(注:真实环境下,此步经常会进一步筛选出需要的sql。结合grep、编辑器等)

shell> python binlog2sql/binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -ttbl --start-file='mysql-bin.000052' --start-position=3346 --stop-position=3556 -B > rollback.sql | cat
输出:
INSERT INTO `test`.`tbl`(`addtime`, `id`, `name`) VALUES ('2016-12-12 00:00:00', 4, '小李'); #start 728 end 938 time 2016-12-13 20:28:05
INSERT INTO `test`.`tbl`(`addtime`, `id`, `name`) VALUES ('2016-12-13 20:25:00', 3, '小孙'); #start 728 end 938 time 2016-12-13 20:28:05
INSERT INTO `test`.`tbl`(`addtime`, `id`, `name`) VALUES ('2016-12-10 00:04:48', 2, '小钱'); #start 728 end 938 time 2016-12-13 20:28:05
INSERT INTO `test`.`tbl`(`addtime`, `id`, `name`) VALUES ('2016-12-10 00:04:33', 1, '小赵'); #start 728 end 938 time 2016-12-13 20:28:05

4.确认回滚sql正确,执行回滚语句。登录mysql确认,数据回滚成功。

shell> mysql -h127.0.0.1 -P3306 -uadmin -p'admin' < rollback.sql
"color: #ff0000">三、总结

3.1 限制(对比mysqlbinlog)

  • mysql server必须开启,离线模式下不能解析
  • 参数 binlog_row_image 必须为FULL,暂不支持MINIMAL
  • 解析速度不如mysqlbinlog

3.2 优点(对比mysqlbinlog)

  • 纯Python开发,安装与使用都很简单
  • 自带flashback、no-primary-key解析模式,无需再装补丁
  • flashback模式下,更适合闪回实战
  • 解析为标准SQL,方便理解、筛选
  • 代码容易改造,可以支持更多个性化解析

总结

标签:
mysql闪回工具binlog2sql,mysql闪回工具,mysql,binlog2sql

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