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下文内容主要给大家带来mysql主从复制命令执行过程,这里所讲到的知识,与书籍略有不同,都是亿速云专业技术人员在与用户接触过程中,总结出来的,具有一定的经验分享价值,希望给广大读者带来帮助。
我这里用docker镜像生成的两个容器,所以会导致主从复制失败:主从的uuid(UUID 是 通用唯一识别码)相同 。
mysql> stop slave;
Query OK, 0 rows affected (0.01 sec)
mysql> CHANGE MASTER TO MASTER_HOST='172.18.0.201',
-> MASTER_PORT=3306,
-> MASTER_USER='rep',
-> MASTER_PASSWORD='123',
-> MASTER_LOG_FILE='binlog.000003',
-> MASTER_LOG_POS=404;
Query OK, 0 rows affected, 2 warnings (0.05 sec)
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 172.18.0.201
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: binlog.000003
Read_Master_Log_Pos: 404
Relay_Log_File: mysqld-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: binlog.000003
Slave_IO_Running: No
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: 404
Relay_Log_Space: 120
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: 1593
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL s erver UUIDs; these UUIDs must be different for replication to work.
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID:
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 the slave I/O thread to update it
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp: 190614 11:55:05
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
ERROR:
No query specified
mysql>
slave:
[root@e915630786b3 log]# cat /var/lib/mysql
mysql/ mysql-files/
[root@e915630786b3 log]# cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=c9db6142-8bfd-11e9-b3b7-0242ac110002
master:
[root@3b7cfc77f2b8 /]# cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=c9db6142-8bfd-11e9-b3b7-0242ac110002
slave:
[root@e915630786b3 log]# rm -rf /var/lib/mysql/auto.cnf
[root@e915630786b3 log]# systemctl restart mysql
[root@e915630786b3 log]# cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=c6f8e6d0-8e9b-11e9-84c9-0242ac1200ca
重新执行一遍主从复制命令即可。
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