MySQL主从同步遇到问题解决方案

1、停止Slave数据库

mysql> stop slave;

2、对Master数据库锁表

mysql> FLUSH TABLES WITH READ LOCK;
mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+-----------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                             |
+------------------+----------+--------------+------------------+-----------------------------------------------+
| mysql-bin.000003 | 79163465 |              |                  | 40cdbb7e-44b8-11e6-92f8-00163e000af0:1-134905 |
+------------------+----------+--------------+------------------+-----------------------------------------------+

3、导出Master数据库数据

$> mysqldump -uroot -p -h 172.31.76.147 --all-databases --triggers --routines --events --master-data > all.sql

4、导入数据库到Slave数据库

$> mysql -uroot -p
mysql> source all.sql
mysql> change master to master_host='172.31.5.106',master_user='slave',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=79163465;

mysql> START SLAVE;
mysql> SHOW SLAVE STATUS\G
mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.31.76.147
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 307
               Relay_Log_File: mysql-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000003
             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: 307
              Relay_Log_Space: 527
              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: 6c0f317c-8bcd-11e8-be49-028c605d1146
             Master_Info_File: /db/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)


注意Slave_IO_Running和Slave_SQL_Running状态都为，如下所示，才表示主从配置成功：
Slave_IO_Running: Yes，Slave_SQL_Running: Yes

MySQL主从同步遇到问题解决方案

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