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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

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

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、把my2sql 二进制文件复制到mysql8的容器中
 docker cp /usr/local/bin/my2sql  mysql8:/usr/local/bin

#2、进入容器
docker exec -it mysql8  bash
chmod +x /usr/local/bin/my2sql

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

mysql> show variables like 'binlog_format';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| binlog_format | ROW   |
+---------------+-------+
1 row in set (0.00 sec)

mysql> show master status;
+----------+----------+--------------+------------------+--------------------------------------------+
| File     | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                            |
+----------+----------+--------------+------------------+----------------------------------------------+
| 1.000001 |     1021 |              |                  | ecd66956-f106-11ec-bb85-0242ac110005:1-19718 |
+----------+----------+--------------+------------------+----------------------------------------------+
1 row in set (0.00 sec)

mysql> flush logs;
Query OK, 0 rows affected (0.71 sec)

mysql> show master status;
+----------+----------+--------------+------------------+----------------------------------------------+
| File     | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                            |
+----------+----------+--------------+------------------+----------------------------------------------+
| 1.000002 |      193 |              |                  | ecd66956-f106-11ec-bb85-0242ac110005:1-19718 |
+----------+----------+--------------+------------------+----------------------------------------------+
1 row in set (0.00 sec)

mysql> show variables like 'innodb_log_group_home_dir';
+---------------------------+-------+
| Variable_name             | Value |
+---------------------------+-------+
| innodb_log_group_home_dir | ./    |
+---------------------------+-------+
1 row in set (0.01 sec)

mysql> show variables like '%datadir%';
+---------------+-----------------+
| Variable_name | Value           |
+---------------+-----------------+
| datadir       | /var/lib/mysql/ |
+---------------+-----------------+
1 row in set (0.00 sec)

step2：查询测试表：

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

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

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

-- 删除5万行数据
mysql> delete from sbtest.sbtest1 where id<50000; 【这里删除了49999行数据】
Query OK, 49999 rows affected (7.72 sec)

--再次看测试表的检验值
mysql> checksum table sbtest.sbtest1;
+----------------+------------+
| Table          | Checksum   |
+----------------+------------+
| sbtest.sbtest1 | 1629663751 |
+----------------+------------+
1 row in set (0.04 sec)

step3：解析binglog文件

#解析binglog文件
[email protected]:/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
[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}
[2022/07/28 10:26:42] [info] events.go:60 start thread 1 to generate redo/rollback sql
[2022/07/28 10:26:42] [info] binlogsyncer.go:360 begin to sync binlog from position (1.000002, 4)
[2022/07/28 10:26:42] [info] stats_process.go:166 start thread to analyze statistics from binlog
[2022/07/28 10:26:42] [info] events.go:210 start thread to write redo/rollback sql into file
[2022/07/28 10:26:42] [info] events.go:60 start thread 2 to generate redo/rollback sql
[2022/07/28 10:26:42] [info] repl.go:16 start to get binlog from mysql
[2022/07/28 10:26:42] [info] binlogsyncer.go:777 rotate to (1.000002, 4)
[2022/07/28 10:26:50] [info] repl.go:84 deadline exceeded.
[2022/07/28 10:26:50] [info] repl.go:18 finish getting binlog from mysql
[2022/07/28 10:26:50] [info] stats_process.go:266 exit thread to analyze statistics from binlog
[2022/07/28 10:26:50] [info] events.go:185 exit thread 1 to generate redo/rollback sql
[2022/07/28 10:26:50] [info] events.go:185 exit thread 2 to generate redo/rollback sql
[2022/07/28 10:26:50] [info] events.go:274 finish writing redo/forward sql into file
[2022/07/28 10:26:50] [info] events.go:277 exit thread to write redo/rollback sql into file
[email protected]:/tmp# ls -lrt
total 2392
-rw-r--r-- 1 root root     261 Jul 28 10:26 biglong_trx.txt
-rw-r--r-- 1 root root 2438845 Jul 28 10:26 forward.2.sql
-rw-r--r-- 1 root root     288 Jul 28 10:26 binlog_status.txt

step4：查看解析后的sql：

--文件binlog_status.txt和biglong_trx.txt是事务的统计信息
[email protected]:/tmp# cat binlog_status.txt 
binlog            starttime           stoptime            startpos   stoppos    inserts  updates  deletes  database        table               
1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 341        9536267    0        0        49999    sbtest          sbtest1             
[email protected]:/tmp# cat biglong_trx.txt
binlog            starttime           stoptime            startpos   stoppos    rows     duration   tables
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)]

--文件forward.2.sql是binlog解析之后的sql
[email protected]:/tmp#  more -10 forward.2.sql 
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=1;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=2;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=3;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=4;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=5;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=6;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=7;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=8;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=9;
DELETE FROM `sbtest`.`sbtest1` WHERE `id`=10;
--More--(0%)

3.2 使用my2sql工具快速闪回

step1：生成闪回sql文件

[email protected]:/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/
[2022/07/28 10:42:55] [info] events.go:60 start thread 1 to generate redo/rollback sql
[2022/07/28 10:42:55] [info] events.go:210 start thread to write redo/rollback sql into file
[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}
[2022/07/28 10:42:55] [info] events.go:60 start thread 2 to generate redo/rollback sql
[2022/07/28 10:42:55] [info] stats_process.go:166 start thread to analyze statistics from binlog
[2022/07/28 10:42:55] [info] binlogsyncer.go:360 begin to sync binlog from position (1.000002, 4)
[2022/07/28 10:42:55] [info] repl.go:16 start to get binlog from mysql
[2022/07/28 10:42:55] [info] binlogsyncer.go:777 rotate to (1.000002, 4)
[2022/07/28 10:43:00] [info] repl.go:84 deadline exceeded.
[2022/07/28 10:43:00] [info] repl.go:18 finish getting binlog from mysql
[2022/07/28 10:43:00] [info] stats_process.go:266 exit thread to analyze statistics from binlog
[2022/07/28 10:43:00] [info] events.go:185 exit thread 1 to generate redo/rollback sql
[2022/07/28 10:43:00] [info] events.go:185 exit thread 2 to generate redo/rollback sql
[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
[2022/07/28 10:43:00] [info] rollback_process.go:15 start thread 1 to revert rollback sql files
[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
[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
[2022/07/28 10:43:00] [info] rollback_process.go:25 exit thread 1 to revert rollback sql files
[2022/07/28 10:43:00] [info] events.go:272 finish reverting content order of tmp files
[2022/07/28 10:43:00] [info] events.go:277 exit thread to write redo/rollback sql into file

step2：查看生成的闪回文件：

[email protected]:/tmp/flashback# ls -lrt
total 12596
-rw-r--r-- 1 root root      261 Jul 28 10:42 biglong_trx.txt
-rw-r--r-- 1 root root      288 Jul 28 10:43 binlog_status.txt
-rw-r--r-- 1 root root 12888636 Jul 28 10:43 rollback.2.sql

[email protected]:/tmp/flashback# cat  biglong_trx.txt
binlog            starttime           stoptime            startpos   stoppos    rows     duration   tables
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)]

[email protected]:/tmp/flashback# cat binlog_status.txt
binlog            starttime           stoptime            startpos   stoppos    inserts  updates  deletes  database        table               
1.000002          2022-07-28_10:24:06 2022-07-28_10:24:06 341        9536267    0        0        49999    sbtest          sbtest1

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

step3：应用rollback文件进行数据恢复

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

step4：最后检查恢复情况

mysql> select count(*) from sbtest.sbtest1;
+----------+
| count(*) |
+----------+
|   100000 |
+----------+
1 row in set (0.01 sec)

mysql> checksum table sbtest.sbtest1;
+----------------+------------+
| Table          | Checksum   |
+----------------+------------+
| sbtest.sbtest1 | 4167997150 |
+----------------+------------+
1 row in set (0.08 sec)

4. 遇到的问题

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

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

解决

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

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

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

解决

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

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

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/280695.html

my2sql工具之快速入门

my2sql工具之快速入门

1. 什么是my2sql？

2. 如何快速部署my2sql工具

方式一 go编译

方式二 已编译好的二进制文件

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

step2：查询测试表：

step3：解析binglog文件

step4：查看解析后的sql：

3.2 使用my2sql工具快速闪回

step1：生成闪回sql文件

step2：查看生成的闪回文件：

step3：应用rollback文件进行数据恢复

step4：最后检查恢复情况

4. 遇到的问题

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

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

5. 使用限制

6.总结

参考文档

相关推荐

发表回复

方式二已编译好的二进制文件