MySQL GTID 主从错误

错误

搭建主从出现以下错误

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Last_IO_Error: The replication receiver thread cannot start because the master has GTID_MODE = OFF and this server has GTID_MODE = ON.

原因

MySQL主从的 Master 和 Slave 必须同时开启或者关闭 enforce-gtid-consistency 和 gtid-mode 功能，即要保持一致。

主节点

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mysql> show variables like '%GTID_MODE%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode     | OFF   |
+---------------+-------+
1 row in set (0.01 sec)

关闭状态

从节点

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

开启状态

解决

开启主节点的 GTID

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


mysql>
mysql>
mysql>  set global gtid_mode=ON;
ERROR 1788 (HY000): The value of @@GLOBAL.GTID_MODE can only be changed one step at a time: OFF <-> OFF_PERMISSIVE <-> ON_PERMISSIVE <-> ON. Also note that this value must be stepped up or down simultaneously on all servers. See the Manual for instructions.
mysql>

在更改GTID_MODE时不可直接跳跃更改，否则会提示报错

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


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


mysql> SET @@GLOBAL.GTID_MODE = OFF_PERMISSIVE;
Query OK, 0 rows affected (0.02 sec)


mysql> SET @@GLOBAL.GTID_MODE = on_permissive;
Query OK, 0 rows affected (0.01 sec)


mysql>  set global gtid_mode=ON;
Query OK, 0 rows affected (0.01 sec)

查看

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mysql> show variables like '%gtid_mode%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| gtid_mode     | ON    |
+---------------+-------+
1 row in set (0.01 sec)

主节点已开启

重新搭建

从库取消主从

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


mysql> reset slave all;
Query OK, 0 rows affected (0.03 sec)

主库查看日志和位点

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mysql> show master status\G
*************************** 1. row ***************************
             File: binlog.000028
         Position: 157
     Binlog_Do_DB:
 Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)

记住 file 文件 和 position 位点

从库搭建

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mysql> CHANGE MASTER TO MASTER_HOST='127.0.0.1', MASTER_USER='root', MASTER_PASSWORD='123456',MASTER_PORT=3306, MASTER_LOG_FILE='binlog.000028', MASTER_LOG_POS=157;
Query OK, 0 rows affected, 1 warning (0.03 sec)


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

查看

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mysql> show slave status\G

发现 Slave_IO_Running 和 Slave_SQL_Running均为 yes。主从同步正常