MySQL 主从复制（二）_（mysqldump）

1. 主库数据生成镜像并上传到从库 

mysqldump --all-databases -uroot -p >dbdump.db

sftp -oPort=22 root@10.0.0.204
sftp> put dbdump.db 

2. 从库配置唯一server-id，并删除从库的auto.cnf文件，重启mysql，生成新的UUID

vim /etc/my.cnf
[mysqld]
server_id=4
rm -rf /data/3306/auto.cnf
/etc/init.d/mysqld restart

3. 从库应用主库的数据镜像

mysql> source dbdump.db;

4. 从库指定主库的日志信息和链接信息

mysql> show master status;
+---------------+----------+--------------+------------------+-------------------+
| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000005 |      471 |              |                  |                   |
+---------------+----------+--------------+------------------+-------------------+

CHANGE MASTER TO 
  MASTER_HOST='10.0.0.201', 
  MASTER_PORT=3306, 
  MASTER_USER='repl', 
  MASTER_PASSWORD='mysql', 
  MASTER_LOG_FILE='binlog.000005', 
  MASTER_LOG_POS=471;

mysql> stop slave;
mysql> reset slave all;

mysql> CHANGE MASTER TO 
    ->   MASTER_HOST='10.0.0.201', 
    ->   MASTER_PORT=3306, 
    ->   MASTER_USER='repl', 
    ->   MASTER_PASSWORD='mysql', 
    ->   MASTER_LOG_FILE='binlog.000005', 
    ->   MASTER_LOG_POS=471;

5. 查看主备库复制是否正常：

mysql> start slave;

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.0.0.201
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000006
          Read_Master_Log_Pos: 441
               Relay_Log_File: slave2-relay-bin.000003
                Relay_Log_Pos: 649
        Relay_Master_Log_File: binlog.000006
             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: 441
              Relay_Log_Space: 1022
              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: 6
                  Master_UUID: c74e4b27-d5f6-11ea-bbe0-000c29396a9d
             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: 
                Auto_Position: 0
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
       Master_public_key_path: 
        Get_master_public_key: 0