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MySQL5.7.19 - 在线变更复制方式 - 从日志 - 到事务

来源：SegmentFault 2023-01-27 14:23:13 0浏览收藏

有志者，事竟成！如果你在学习数据库，那么本文《MySQL5.7.19 - 在线变更复制方式 - 从日志 - 到事务》，就很适合你！文章讲解的知识点主要包括MySQL、日志、事务、复制、gtid，若是你对本文感兴趣，或者是想搞懂其中某个知识点，就请你继续往下看吧~

【提前说明】

Master和Slave需并行操作，即Master和Slave的第一步都完成后，才能执行第二步；
每一步，先执行Master还是先执行Slave，没有要求；

【Master - Lebron - 192.168.1.122】

检查Master版本是否大于5.7.6

mysql> show variables like 'version';
+---------------+------------+
| Variable_name | Value      |
+---------------+------------+
| version       | 5.7.19-log |
+---------------+------------+
1 row in set (0.00 sec)

检查Master的gtid_mode是否为off

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

第一步

mysql> set @@global.enforce_gtid_consistency=warn;
Query OK, 0 rows affected (0.00 sec)

退出mysql，查看错误日志，确保没有错误

mysql> quit
Bye
[root@lebron sysconfig]# tail -f /var/log/mysqld.log
Version: '5.7.19-log'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Server (GPL)
2017-12-10T15:29:40.557075Z 0 [Note] Executing 'SELECT * FROM INFORMATION_SCHEMA.TABLES;' to get a list of tables using the deprecated partition engine. You may use the startup option '--disable-partition-engine-check' to skip this check. 
2017-12-10T15:29:40.557077Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-12-10T15:29:40.564129Z 0 [Note] End of list of non-natively partitioned tables
2017-12-10T15:29:41.171276Z 3 [Note] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO)
2017-12-10T17:20:10.601941Z 6 [Warning] IP address '192.168.1.123' could not be resolved: Name or service not known
2017-12-10T17:34:27.796701Z 10 [Note] Start binlog_dump to master_thread_id(10) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T17:39:27.813157Z 11 [Note] While initializing dump thread for slave with UUID <a41e6957-dc02-11e7-a9aa-0800271c6805>, found a zombie dump thread with the same UUID. Master is killing the zombie dump thread(10).
2017-12-10T17:39:27.813305Z 11 [Note] Start binlog_dump to master_thread_id(11) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T19:01:14.798790Z 12 [Note] Changed ENFORCE_GTID_CONSISTENCY from OFF to WARN.</a41e6957-dc02-11e7-a9aa-0800271c6805>

第二步

mysql> set @@global.enforce_gtid_consistency=on;
Query OK, 0 rows affected (0.00 sec)

第三步

mysql> set @@global.gtid_mode=off_permissive;
Query OK, 0 rows affected (0.02 sec)

退出mysql，查看错误日志，确保没有错误

mysql> quit
Bye
[root@lebron sysconfig]# tail -f /var/log/mysqld.log
2017-12-10T15:29:40.557077Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-12-10T15:29:40.564129Z 0 [Note] End of list of non-natively partitioned tables
2017-12-10T15:29:41.171276Z 3 [Note] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO)
2017-12-10T17:20:10.601941Z 6 [Warning] IP address '192.168.1.123' could not be resolved: Name or service not known
2017-12-10T17:34:27.796701Z 10 [Note] Start binlog_dump to master_thread_id(10) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T17:39:27.813157Z 11 [Note] While initializing dump thread for slave with UUID <a41e6957-dc02-11e7-a9aa-0800271c6805>, found a zombie dump thread with the same UUID. Master is killing the zombie dump thread(10).
2017-12-10T17:39:27.813305Z 11 [Note] Start binlog_dump to master_thread_id(11) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T19:01:14.798790Z 12 [Note] Changed ENFORCE_GTID_CONSISTENCY from OFF to WARN.
2017-12-10T19:05:50.369256Z 13 [Note] Changed ENFORCE_GTID_CONSISTENCY from WARN to ON.
2017-12-10T19:09:01.626528Z 13 [Note] Changed GTID_MODE from OFF to OFF_PERMISSIVE.</a41e6957-dc02-11e7-a9aa-0800271c6805>

第四步

mysql> set @@global.gtid_mode=on_permissive;
Query OK, 0 rows affected (0.02 sec)

查看设置结果

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

第五步 - Master无操作，Slave上确认基于日志的复制是否都已完成

第六步

mysql> set @@global.gtid_mode=on;
Query OK, 0 rows affected (0.02 sec)

第七 ~ 十步 - Master上无操作

【Slave - Kyrie - 192.168.1.123】

检查Slave版本是否大于5.7.6

mysql> show variables like 'version';
+---------------+------------+
| Variable_name | Value      |
+---------------+------------+
| version       | 5.7.19-log |
+---------------+------------+
1 row in set (0.00 sec)

检查Slave的gtid_mode是否为off

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

第一步

mysql> set @@global.enforce_gtid_consistency=warn;
Query OK, 0 rows affected (0.00 sec)

第二步

mysql> set @@global.enforce_gtid_consistency=on;
Query OK, 0 rows affected (0.00 sec)

第三步

mysql> set @@global.gtid_mode=off_permissive;
Query OK, 0 rows affected (0.02 sec)

退出mysql，查看错误日志，确保没有错误

mysql> quit
Bye
[root@lebron sysconfig]# tail -f /var/log/mysqld.log
2017-12-10T15:29:40.557077Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-12-10T15:29:40.564129Z 0 [Note] End of list of non-natively partitioned tables
2017-12-10T15:29:41.171276Z 3 [Note] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO)
2017-12-10T17:20:10.601941Z 6 [Warning] IP address '192.168.1.123' could not be resolved: Name or service not known
2017-12-10T17:34:27.796701Z 10 [Note] Start binlog_dump to master_thread_id(10) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T17:39:27.813157Z 11 [Note] While initializing dump thread for slave with UUID <a41e6957-dc02-11e7-a9aa-0800271c6805>, found a zombie dump thread with the same UUID. Master is killing the zombie dump thread(10).
2017-12-10T17:39:27.813305Z 11 [Note] Start binlog_dump to master_thread_id(11) slave_server(100), pos(mysql-bin.000001, 154)
2017-12-10T19:01:14.798790Z 12 [Note] Changed ENFORCE_GTID_CONSISTENCY from OFF to WARN.
2017-12-10T19:05:50.369256Z 13 [Note] Changed ENFORCE_GTID_CONSISTENCY from WARN to ON.
2017-12-10T19:09:01.626528Z 13 [Note] Changed GTID_MODE from OFF to OFF_PERMISSIVE.</a41e6957-dc02-11e7-a9aa-0800271c6805>

第四步

mysql> set @@global.gtid_mode=on_permissive;
Query OK, 0 rows affected (0.02 sec)

查看设置结果

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

第五步 - 检查Master的数据是否都同步到Slave上了，Empty表示都同步了

匿名复制，即所有非gtid的复制，即基于日志的复制;
如果结果非空，要等到结果为空才能继续操作;

mysql> show status like 'ongoing_anonymouse_transaction_count';
Empty set (0.00 sec)

第六步

mysql> set @@global.gtid_mode=on;
Query OK, 0 rows affected (0.02 sec)

第七步

mysql> stop slave;
Query OK, 0 rows affected (0.01 sec)

第八步

mysql> change master to master_auto_position=1;
Query OK, 0 rows affected (0.01 sec)

第九步

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

第十步

当主从间发生同步后，Retrieved_Gtid_Set & Executed_Gtid_Set才有值；

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.122
                  Master_User: lxl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000004
          Read_Master_Log_Pos: 420
               Relay_Log_File: lebron-relay-bin.000002
                Relay_Log_Pos: 633
        Relay_Master_Log_File: mysql-bin.000004
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 420
              Relay_Log_Space: 841
              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: a41e6957-dc02-11e7-a9aa-0800271c6804
             Master_Info_File: /var/lib/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: a41e6957-dc02-11e7-a9aa-0800271c6804:1
            Executed_Gtid_Set: a41e6957-dc02-11e7-a9aa-0800271c6804:1
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)

ERROR: 
No query specified