切换-5.7-GTID复制切换成传统复制

mysql5.7 gtid和传统复制在线切换,5.7.6 之后不用重启可以直接在线切换

基本环境

	Master	Slave
MySQL版本	MySQL-5.7.16-X86_64	MySQL-5.7.16-X86_64
IP	192.168.56.156	192.168.56.157
Port	3306	3306

gtid_mode 几种状态的说明：

off : 不产生GTID,基于binlog+position ,slave也不能接受GTID的日志

off_permissive : 不产生GTID,但作为slave可以识别到GTID事物，也可以识别非GTID事物

on_permissive : 产生GTID事物，Slave可以处理GTID事物和非GTID事物

on : 产生GTID事物，slave只接受GTID事物

1.停止slave

mysql>stop slave;

2. 查看slave状态,记录master_log_file和position信息。

mysql> show slave status \G;

*************************** 1. row ***************************

Slave_IO_State:

Master_Host: 192.168.56.156

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000001

Read_Master_Log_Pos: 428

Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 641

Relay_Master_Log_File: mysql-bin.000001

Slave_IO_Running: No

Slave_SQL_Running: No

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: 428

Relay_Log_Space: 842

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: 0

Last_SQL_Error:

Replicate_Ignore_Server_Ids:

Master_Server_Id: 1563306

Master_UUID: 4dc90770-e120-11e6-9fd7-000c29355816

Master_Info_File: mysql.slave_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:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set: 4dc90770-e120-11e6-9fd7-000c29355816:1

Executed_Gtid_Set: 4dc90770-e120-11e6-9fd7-000c29355816:1

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row in set (0.00 sec)

3.根据上面记录的信息 change master

change master to master_log_file=‘mysql-bin.000001‘,master_log_pos=428,master_auto_position=0;

参数解释：

master_log_file = Relay_Master_Log_File: mysql-bin.000001

master_log_pos = Exec_Master_Log_Pos: 428

master_auto_position=0 禁用: master_auto_position

mysql>start slave;

mysql> show slave status \G;

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.56.156

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000001

Read_Master_Log_Pos: 428

Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 320

Relay_Master_Log_File: mysql-bin.000001

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: 428

Relay_Log_Space: 561

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: 1563306

Master_UUID: 4dc90770-e120-11e6-9fd7-000c29355816

Master_Info_File: mysql.slave_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:

Executed_Gtid_Set: 4dc90770-e120-11e6-9fd7-000c29355816:1

Auto_Position: 0

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row in set (0.00 sec)

数据测试

略。

4. 更改gtid模式(master和slave都执行)

4.1 master 和 slave都要修改

mysql> set @@global.gtid_mode=on_permissive;

mysql> show variables like ‘gtid_mode‘;

+---------------+---------------+

| Variable_name | Value |

+---------------+---------------+

| gtid_mode | ON_PERMISSIVE |

+---------------+---------------+

on_permissive 产生GTID事物，Slave可以处理GTID事物和非GTID事物

可以在主库上insert数据,show master查看信息。（步骤略）

4.2 master和slave都要修改

mysql> set @@global.gtid_mode=off_permissive;

mysql> show variables like ‘gtid_mode‘;

+---------------+----------------+

| Variable_name | Value |

+---------------+----------------+

| gtid_mode | OFF_PERMISSIVE |

+---------------+----------------+

off_permissive 不产生GTID,但作为slave可以识别到GTID事物，也可以识别非GTID事物

可以测试一下 insert into 一条数据, show master status;(具体步骤略)

4.3 master和slave端都要修改

mysql>set @@global.gtid_mode=off;

mysql>show variables like ‘gtid_mode‘;

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| gtid_mode | OFF |

+---------------+-------+

1 row in set (0.01 sec)

OFF ：不产生GTID,基于binlog+position ,slave也不能接受GTID的日志

5.查看更改是否有效

5.1先记录slave的相关信息

mysql> show slave status\G;

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.56.156

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000004

Read_Master_Log_Pos: 194

Relay_Log_File: relay-bin.000008

Relay_Log_Pos: 407

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: 194

Relay_Log_Space: 695

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: 1563306

Master_UUID: 4dc90770-e120-11e6-9fd7-000c29355816

Master_Info_File: mysql.slave_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: 4dc90770-e120-11e6-9fd7-000c29355816:2-4

Executed_Gtid_Set: 4dc90770-e120-11e6-9fd7-000c29355816:1-4

Auto_Position: 0

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row in set (0.00 sec)

在master做一些数据操作：

略。

如果看到pos的信息变化了，而gtid的信息没有变。说明现在已经转换成了传统复制。

mysql> show slave status \G;

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.56.156

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000004

Read_Master_Log_Pos: 469

Relay_Log_File: relay-bin.000008

Relay_Log_Pos: 682

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: 469

Relay_Log_Space: 970

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: 1563306

Master_UUID: 4dc90770-e120-11e6-9fd7-000c29355816

Master_Info_File: mysql.slave_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: 4dc90770-e120-11e6-9fd7-000c29355816:2-4

Executed_Gtid_Set: 4dc90770-e120-11e6-9fd7-000c29355816:1-4

Auto_Position: 0

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row in set (0.00 sec)

6.最后一步：修改配置文件my.conf

[mysqld]

gtid_mode=off

enforce_gtid_consistency=off

时间： 2024-10-09 14:00:47

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