关于replicate_do_db和replicate_ignore_db的坑
介绍
MySQL5.7官方文档关于相关参数的介绍：https://dev.mysql.com/doc/refman/5.7/en/change-replication-filter.html
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在5.7版本支持动态修改，之前的版本需要重启数据库：
STOP SLAVE SQL_THREAD;
CHANGE REPLICATION FILTER REPLICATE_IGNORE_DB=(demo);
START SLAVE SQL_THREAD;
问题描述
在主库执行语句，如果不使用use db;
创建新表的语句不会在从库执行，进而导致主从错误
场景复现
从库配置：
replicate-ignore-db = test
replicate-do-db = abc
主库操作：
22:29:04test>use test;
Database changed
22:30:26test>create table abc.t0417(id int,name varchar(20));
Query OK, 0 rows affected (0.08 sec)
22:31:37abc>use test;
Database changed
22:32:05test>insert into abc.t0417 values(1,'a');
Query OK, 1 row affected (0.02 sec)
从库状态,SQL线程出现报错：
22:31:07abc>show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.136.128
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000015
Read_Master_Log_Pos: 8478
Relay_Log_File: cptest-relay-bin.000007
Relay_Log_Pos: 1292
Relay_Master_Log_File: mysql-bin.000015
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB: abc
Replicate_Ignore_DB: test
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1146
Last_Error: Error executing row event: 'Table 'abc.t0417' doesn't exist'
Skip_Counter: 0
Exec_Master_Log_Pos: 8235
Relay_Log_Space: 1709
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1146
Last_SQL_Error: Error executing row event: 'Table 'abc.t0417' doesn't exist'
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 4ac80f6d-8063-11e7-9d63-000c291d913c
Master_Info_File: /data/mysql/mysql3309/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp: 180416 22:32:20
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 4ac80f6d-8063-11e7-9d63-000c291d913c:3609-3630
Executed_Gtid_Set: 4ac80f6d-8063-11e7-9d63-000c291d913c:1:3609-3629,
a1c747e9-4170-11e8-883f-000c29c6b279:1
Auto_Position: 0
1 row in set (0.00 sec)
解决问题
更改从库配置：
#replicate-ignore-db = test
#replicate-do-db = abc
replicate_wild_do_table = abc.%
replicate_wild_ignore_table = test.%
主库操作:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 65
Server version: 5.6.35-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
caopeng@192.168.136.128 00:39:16(none)>use test;
Database changed
caopeng@192.168.136.128 00:39:32test>create table abc.test0417(id int,name varchar(20));
Query OK, 0 rows affected (0.17 sec)
caopeng@192.168.136.128 00:40:25test>insert into abc.test0417 values(1,'b');
Query OK, 1 row affected (0.11 sec)
从库状态：
root@localhost 00:39:06(none)>show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.136.128
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000015
Read_Master_Log_Pos: 9644
Relay_Log_File: cptest-relay-bin.000010
Relay_Log_Pos: 771
Relay_Master_Log_File: mysql-bin.000015
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table: abc.%
Replicate_Wild_Ignore_Table: test.%
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 9644
Relay_Log_Space: 945
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 4ac80f6d-8063-11e7-9d63-000c291d913c
Master_Info_File: /data/mysql/mysql3309/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 4ac80f6d-8063-11e7-9d63-000c291d913c:3609-3635
Executed_Gtid_Set: 4ac80f6d-8063-11e7-9d63-000c291d913c:1:3609-3635,
a1c747e9-4170-11e8-883f-000c29c6b279:1-6
Auto_Position: 0
1 row in set (0.00 sec)
root@localhost 00:40:54(none)>select * from abc.test0417;
+------+------+
| id | name |
+------+------+
| 1 | b |
+------+------+
1 row in set (0.00 sec)
总结
- 使用replicate_do_db和replicate_ignore_db两个参数时在主库操作需要使用use db;然后再进行其他操作
- 推荐使用replicate_wild_do_table，
replicate_wild_ignore_table
网站题目：关于replicate_do_db和replicate_ignore_db的坑
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