mysql数据库主从复制添加第N个从库_程序开发

mysql数据库主从复制添加第N个从库

admin

2023-05-29 15:21:13

0次

添加mysql从库

mysql主从复制服务器 1主 1从，现在要添加一个mysql从服务器，要求主库不能停止服务，以前由于不是线上的服务器，可以在主服务器上执行 flush tables with read lock 语句(锁表,只读)，所有的表只能读不能写，然后再拷贝主库数据到新的从库服务器上，并保持数据一致性，现在只能换一种方法了，思路新从库2拷贝老的从库1的数据！

从库1的操作

mysql> show slave status\G ;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.2.115
                  Master_User: rep1
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 19725129
               Relay_Log_File: web-relay-bin.000002
                Relay_Log_Pos: 283
        Relay_Master_Log_File: mysql-bin.000001
             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: 19725129
              Relay_Log_Space: 454
              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: 8bb53f82-bc15-11e6-9d52-000c2974e60c
             Master_Info_File: /usr/local/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the sla                                                                                                 ve I/O thread to update it
           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
1 row in set (0.00 sec)

ERROR:
No query specified

打包数据传送到从库2

cd /usr/local/mysql/data

tar -zcvf zabbix.tar.gz zabbix/

scp zabbix.tar.gz root@(从库2ip):/usr/local/mysql/daba/

从库2的操作

给改server-id 与从库1 和主库不一样

将传送来的数据放到指定库的位置

tar -zxvf zabbix.tar.gz

mysql > change master to master_host='192.168.2.115',master_user='rep1',master_password='password',master_log_file='mysql-bin.000001',master_log_pos=19725129;

mysql > starat slave ;

mysql > show slave status\G

现在已经好了

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