在配置Mysql主从备份时 从数据库的状态一直是Error,状态图如下
原因：从数据库读取日志文件位置问题，没有与主数据的位置相对应；
解决方式：查看主数据库的状态
更改从数据库读取日志的文件和位置
mysql> CHANGE MASTER TO MASTER_LOG_FILE='master_log.000005',MASTER_LOG_POS=154;
Query OK, 0 rows affected (0.00 sec)
mysql> change master to master_host='192.168.8.7',master_user='myslave',master_password='123456',master_log_file='master_log.000005';
Query OK, 0 rows affected, 3 warnings (0.00 sec)
然后主从关系生效：
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.8.7
Master_User: myslave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: master_log.000005
Read_Master_Log_Pos: 154
Relay_Log_File: node03-relay-bin.000004
Relay_Log_Pos: 321
Relay_Master_Log_File: master_log.000005
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: 154
Relay_Log_Space: 904
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: cb10f6cf-d1f7-11e8-a480-000c29563c0d
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:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
