ToB企服应用市场:ToB评测及商务社交产业平台

标题: my2sql工具之快速入门 [打印本页]

---

作者: 尚未崩坏    时间: 2022-9-16 17:19
标题: my2sql工具之快速入门

• GreatSQL社区原创内容未经授权不得随意使用，转载请联系小编并注明来源。
  
• GreatSQL是MySQL的国产分支版本，使用上与MySQL一致。
  

my2sql工具之快速入门

• 1.什么是my2sql
  
• 2.如何快速部署my2sql工具
  
• 3.如何使用my2sql工具
  
  
  
  • 3.1使用my2sql工具解析binglog文件
    
  • 3.2使用my2sql工具快速闪回
    
  
  
• 4.遇到的问题
  
• 5.使用限制
  
• 6.总结
  

1. 什么是my2sql？

my2sql是go版MySQL binlog解析工具，通过解析MySQL binlog ，可以生成原始SQL、回滚SQL、去除主键的INSERT SQL等，也可以生成DML统计信息。类似工具有binlog2sql、MyFlash、my2fback等，本工具基于my2fback、binlog_rollback工具二次开发而来。

2. 如何快速部署my2sql工具

方式一 go编译

1. git clone https://github.com/liuhr/my2sql.git
2. cd my2sql/
3. go build .

复制代码

方式二 已编译好的二进制文件

二进制文件下载地址
https://github.com/liuhr/my2sql/blob/master/releases/centOS_release_7.x/my2sql

复制到我的docker中

1. #1、把my2sql 二进制文件复制到mysql8的容器中
2. docker cp /usr/local/bin/my2sql  mysql8:/usr/local/bin
4. #2、进入容器
5. docker exec -it mysql8  bash
6. chmod +x /usr/local/bin/my2sql

复制代码

3. 如何使用my2sql工具

3.1 使用my2sql工具解析binglog文件

step1：查询binglog文件

1. mysql> show variables like 'binlog_format';
2. +---------------+-------+
3. | Variable_name | Value |
4. +---------------+-------+
5. | binlog_format | ROW   |
6. +---------------+-------+
7. 1 row in set (0.00 sec)
9. mysql> show master status;
10. +----------+----------+--------------+------------------+--------------------------------------------+
11. | File     | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                            |
12. +----------+----------+--------------+------------------+----------------------------------------------+
13. | 1.000001 |     1021 |              |                  | ecd66956-f106-11ec-bb85-0242ac110005:1-19718 |
14. +----------+----------+--------------+------------------+----------------------------------------------+
15. 1 row in set (0.00 sec)
17. mysql> flush logs;
18. Query OK, 0 rows affected (0.71 sec)
20. mysql> show master status;
21. +----------+----------+--------------+------------------+----------------------------------------------+
22. | File     | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                            |
23. +----------+----------+--------------+------------------+----------------------------------------------+
24. | 1.000002 |      193 |              |                  | ecd66956-f106-11ec-bb85-0242ac110005:1-19718 |
25. +----------+----------+--------------+------------------+----------------------------------------------+
26. 1 row in set (0.00 sec)
28. mysql> show variables like 'innodb_log_group_home_dir';
29. +---------------------------+-------+
30. | Variable_name             | Value |
31. +---------------------------+-------+
32. | innodb_log_group_home_dir | ./    |
33. +---------------------------+-------+
34. 1 row in set (0.01 sec)
36. mysql> show variables like '%datadir%';
37. +---------------+-----------------+
38. | Variable_name | Value           |
39. +---------------+-----------------+
40. | datadir       | /var/lib/mysql/ |
41. +---------------+-----------------+
42. 1 row in set (0.00 sec)

复制代码

step2：查询测试表：

1. -- 查看测试表结构
2. mysql> show create table sbtest.sbtest1\G;
3. *************************** 1. row ***************************
4.        Table: sbtest1
5. Create Table: CREATE TABLE `sbtest1` (
6.   `id` int NOT NULL AUTO_INCREMENT,
7.   `k` int NOT NULL DEFAULT '0',
8.   `c` char(120) COLLATE utf8mb4_0900_bin NOT NULL DEFAULT '',
9.   `pad` char(60) COLLATE utf8mb4_0900_bin NOT NULL DEFAULT '',
10.   PRIMARY KEY (`id`),
11.   KEY `k_1` (`k`)
12. ) ENGINE=InnoDB AUTO_INCREMENT=100001 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_bin
13. 1 row in set (0.00 sec)

复制代码

1. --查看测试表行数
2. mysql> select count(*) from sbtest.sbtest1;
3. +----------+
4. | count(*) |
5. +----------+
6. |   100000 |
7. +----------+
8. 1 row in set (0.00 sec)

复制代码

1. --查看测试表的检验值
2. mysql> checksum table sbtest.sbtest1;
3. +----------------+------------+
4. | Table          | Checksum   |
5. +----------------+------------+
6. | sbtest.sbtest1 | 4167997150 |
7. +----------------+------------+
8. 1 row in set (0.09 sec)

复制代码

1. -- 删除5万行数据
2. mysql> delete from sbtest.sbtest1 where id<50000; 【这里删除了49999行数据】
3. Query OK, 49999 rows affected (7.72 sec)
5. --再次看测试表的检验值
6. mysql> checksum table sbtest.sbtest1;
7. +----------------+------------+
8. | Table          | Checksum   |
9. +----------------+------------+
10. | sbtest.sbtest1 | 1629663751 |
11. +----------------+------------+
12. 1 row in set (0.04 sec)

复制代码

step3：解析binglog文件

1. #解析binglog文件
2. root@29b86217f7d4:/tmp# my2sql  -user root -password ****** -host 127.0.0.1 -port 3306 -databases sbtest -tables sbtest1 -mode repl -work-type 2sql -start-file 1.000002 -output-dir /tmp
3. [2022/07/28 10:26:42] [info] binlogsyncer.go:144 create BinlogSyncer with config {1113306 mysql 127.0.0.1 3306 root   utf8 false false <nil> false UTC false 0 0s 0s 0 false false 0}
4. [2022/07/28 10:26:42] [info] events.go:60 start thread 1 to generate redo/rollback sql
5. [2022/07/28 10:26:42] [info] binlogsyncer.go:360 begin to sync binlog from position (1.000002, 4)
6. [2022/07/28 10:26:42] [info] stats_process.go:166 start thread to analyze statistics from binlog
7. [2022/07/28 10:26:42] [info] events.go:210 start thread to write redo/rollback sql into file
8. [2022/07/28 10:26:42] [info] events.go:60 start thread 2 to generate redo/rollback sql
9. [2022/07/28 10:26:42] [info] repl.go:16 start to get binlog from mysql
10. [2022/07/28 10:26:42] [info] binlogsyncer.go:777 rotate to (1.000002, 4)
11. [2022/07/28 10:26:50] [info] repl.go:84 deadline exceeded.
12. [2022/07/28 10:26:50] [info] repl.go:18 finish getting binlog from mysql
13. [2022/07/28 10:26:50] [info] stats_process.go:266 exit thread to analyze statistics from binlog
14. [2022/07/28 10:26:50] [info] events.go:185 exit thread 1 to generate redo/rollback sql
15. [2022/07/28 10:26:50] [info] events.go:185 exit thread 2 to generate redo/rollback sql
16. [2022/07/28 10:26:50] [info] events.go:274 finish writing redo/forward sql into file
17. [2022/07/28 10:26:50] [info] events.go:277 exit thread to write redo/rollback sql into file
18. root@29b86217f7d4:/tmp# ls -lrt
19. total 2392
20. -rw-r--r-- 1 root root     261 Jul 28 10:26 biglong_trx.txt
21. -rw-r--r-- 1 root root 2438845 Jul 28 10:26 forward.2.sql
22. -rw-r--r-- 1 root root     288 Jul 28 10:26 binlog_status.txt

复制代码

step4：查看解析后的sql：

1. --文件binlog_status.txt和biglong_trx.txt是事务的统计信息
2. root@29b86217f7d4:/tmp# cat binlog_status.txt
3. binlog            starttime           stoptime            startpos   stoppos    inserts  updates  deletes  database        table               
4. 1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 341        9536267    0        0        49999    sbtest          sbtest1            
5. root@29b86217f7d4:/tmp# cat biglong_trx.txt
6. binlog            starttime           stoptime            startpos   stoppos    rows     duration   tables
7. 1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 269        9536294    49999    0          [sbtest.sbtest1(inserts=0, updates=0, deletes=49999)]

复制代码

1. --文件forward.2.sql是binlog解析之后的sql
2. root@29b86217f7d4:/tmp#  more -10 forward.2.sql
3. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=1;
4. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=2;
5. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=3;
6. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=4;
7. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=5;
8. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=6;
9. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=7;
10. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=8;
11. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=9;
12. DELETE FROM `sbtest`.`sbtest1` WHERE `id`=10;
13. --More--(0%)

复制代码

3.2 使用my2sql工具快速闪回

step1：生成闪回sql文件

1. root@29b86217f7d4:/tmp# my2sql  -user root -password ****** -host 127.0.0.1 -port 3306 -databases sbtest -tables sbtest1 -mode repl -work-type rollback   -start-file 1.000002  -output-dir /tmp/flashback/
2. [2022/07/28 10:42:55] [info] events.go:60 start thread 1 to generate redo/rollback sql
3. [2022/07/28 10:42:55] [info] events.go:210 start thread to write redo/rollback sql into file
4. [2022/07/28 10:42:55] [info] binlogsyncer.go:144 create BinlogSyncer with config {1113306 mysql 127.0.0.1 3306 root   utf8 false false <nil> false UTC false 0 0s 0s 0 false false 0}
5. [2022/07/28 10:42:55] [info] events.go:60 start thread 2 to generate redo/rollback sql
6. [2022/07/28 10:42:55] [info] stats_process.go:166 start thread to analyze statistics from binlog
7. [2022/07/28 10:42:55] [info] binlogsyncer.go:360 begin to sync binlog from position (1.000002, 4)
8. [2022/07/28 10:42:55] [info] repl.go:16 start to get binlog from mysql
9. [2022/07/28 10:42:55] [info] binlogsyncer.go:777 rotate to (1.000002, 4)
10. [2022/07/28 10:43:00] [info] repl.go:84 deadline exceeded.
11. [2022/07/28 10:43:00] [info] repl.go:18 finish getting binlog from mysql
12. [2022/07/28 10:43:00] [info] stats_process.go:266 exit thread to analyze statistics from binlog
13. [2022/07/28 10:43:00] [info] events.go:185 exit thread 1 to generate redo/rollback sql
14. [2022/07/28 10:43:00] [info] events.go:185 exit thread 2 to generate redo/rollback sql
15. [2022/07/28 10:43:00] [info] events.go:259 finish writing rollback sql into tmp files, start to revert content order of tmp files
16. [2022/07/28 10:43:00] [info] rollback_process.go:15 start thread 1 to revert rollback sql files
17. [2022/07/28 10:43:00] [info] rollback_process.go:41 start to revert tmp file /tmp/flashback/.rollback.2.sql into /tmp/flashback/rollback.2.sql
18. [2022/07/28 10:43:00] [info] rollback_process.go:156 finish reverting tmp file /tmp/flashback/.rollback.2.sql into /tmp/flashback/rollback.2.sql
19. [2022/07/28 10:43:00] [info] rollback_process.go:25 exit thread 1 to revert rollback sql files
20. [2022/07/28 10:43:00] [info] events.go:272 finish reverting content order of tmp files
21. [2022/07/28 10:43:00] [info] events.go:277 exit thread to write redo/rollback sql into file

复制代码

step2：查看生成的闪回文件：

1. root@29b86217f7d4:/tmp/flashback# ls -lrt
2. total 12596
3. -rw-r--r-- 1 root root      261 Jul 28 10:42 biglong_trx.txt
4. -rw-r--r-- 1 root root      288 Jul 28 10:43 binlog_status.txt
5. -rw-r--r-- 1 root root 12888636 Jul 28 10:43 rollback.2.sql

复制代码

1. root@29b86217f7d4:/tmp/flashback# cat  biglong_trx.txt
2. binlog            starttime           stoptime            startpos   stoppos    rows     duration   tables
3. 1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 269        9536294    49999    0          [sbtest.sbtest1(inserts=0, updates=0, deletes=49999)]

复制代码

1. root@29b86217f7d4:/tmp/flashback# cat binlog_status.txt
2. binlog            starttime           stoptime            startpos   stoppos    inserts  updates  deletes  database        table               
3. 1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 341        9536267    0        0        49999    sbtest          sbtest1           

复制代码

1. root@29b86217f7d4:/tmp/flashback# more -10 rollback.2.sql
2. INSERT INTO `sbtest`.`sbtest1` (`id`,`k`,`c`,`pad`) VALUES (49999,33022,'82276829554-28600016482-71437056503-67189283057-49828408020-97469013057-54486869404-00631592142
3. -97314346455-10619483378','14496218158-82953408254-72982060504-31493955809-57788873512');
4. INSERT INTO `sbtest`.`sbtest1` (`id`,`k`,`c`,`pad`) VALUES (49998,50244,'96937339387-30971064351-79066739653-24906328840-02614118448-07131634761-96921531810-30574594369
5. -22852947139-53163560618','11061918782-99235282357-54725926348-09882016546-43656283296');
6. INSERT INTO `sbtest`.`sbtest1` (`id`,`k`,`c`,`pad`) VALUES (49997,49958,'23875561992-79383179714-31844019265-78678195929-11039506986-44432953782-19018620372-45679869851
7. -21838821757-54316746647','72021998255-21544610411-49097617755-83325624702-67496909817');
8. INSERT INTO `sbtest`.`sbtest1` (`id`,`k`,`c`,`pad`) VALUES (49996,49784,'64121185719-74243968401-44193775190-53796401184-56297492349-79981936074-03057285270-03714583251
9. -22209198873-10937378934','77159337465-83656217977-70877234699-71552982384-42185635425');
10. INSERT INTO `sbtest`.`sbtest1` (`id`,`k`,`c`,`pad`) VALUES (49995,49750,'32364537835-96169411677-52025383891-99856461851-54876781624-38035712955-18254695168-34412213489
11. -24174915574-41228645716','40846762001-49118260546-21871620253-63339659850-56585169893');
12. --More--(0%)

复制代码

step3：应用rollback文件进行数据恢复

1. mysql -uroot -p****** -P3306 -h127.0.0.1 sbtest < /tmp/flashback/rollback.2.sql

复制代码

step4：最后检查恢复情况

1. mysql> select count(*) from sbtest.sbtest1;
2. +----------+
3. | count(*) |
4. +----------+
5. |   100000 |
6. +----------+
7. 1 row in set (0.01 sec)

复制代码

1. mysql> checksum table sbtest.sbtest1;
2. +----------------+------------+
3. | Table          | Checksum   |
4. +----------------+------------+
5. | sbtest.sbtest1 | 4167997150 |
6. +----------------+------------+
7. 1 row in set (0.08 sec)

复制代码

4. 遇到的问题

问题1：Connect mysql failed this authentication plugin is not supported

1. my2sql  -user greatsql -password ****** -host 127.0.0.1 -port 3306  -mode repl -work-type 2sql -start-file binlog.000001
2. [2022/07/28 10:00:01] [fatal] context.go:575 Connect mysql failed this authentication plugin is not supported

复制代码

解决

1. #修改
2. ALTER USER 'username'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
3. FLUSH PRIVILEGES;

复制代码

问题2：Connect mysql failed this user requires mysql native password authentication.

1. my2sql  -user greatsql  -password ****** 127.0.0.1 -port 3306 -mode repl -work-type 2sql -start-file binlog.000001
2. [2022/07/28 09:35:08] [fatal] context.go:575 Connect mysql failed this user requires mysql native password authentication.

复制代码

解决

1. #mysql配置文件中增加以下配置项并重启
2. default_authentication_plugin=mysql_native_password

复制代码

5. 使用限制

• 使用回滚/闪回功能时，binlog格式必须为row,且binlog_row_image=full， DML统计以及大事务分析不受影响。
  
• 只能回滚DML， 不能回滚DDL。
  
• 支持指定-tl时区来解释binlog中time/datetime字段的内容。开始时间-start-datetime与结束时间-stop-datetime也会使用此指定的时区， 但注意此开始与结束时间针对的是binlog event header中保存的unix timestamp。结果中的额外的datetime时间信息都是binlog event header中的unix timestamp。
  
• 此工具是伪装成从库拉取binlog，需要连接数据库的用户有SELECT, REPLICATION SLAVE, REPLICATION CLIENT权限。
  
• MySQL8.0版本需要在配置文件中加入default_authentication_plugin =mysql_native_password，用户密码认证必须是mysql_native_password才能解析。
  

6.总结

my2sql除了可以用来做binlog的解析、闪回，还提供主从切换后新master丢数据的修复、大事务和长事务的分析、主从延迟分析等，后面有空继续分享my2sql在事务方面的应用，大家也可以自己动手实践一下。
参考文档

https://github.com/liuhr/my2sql/blob/master/README.md

Enjoy GreatSQL
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！

---

欢迎光临 ToB企服应用市场:ToB评测及商务社交产业平台 (https://dis.qidao123.com/)

Powered by Discuz! X3.4