mysql全备+ 主从设置

2018-11-08  本文已影响0人  繁华丶凋零

mysql A 已有数据
mysql B 空的

想要主从,先保持两边的有一样的数据 ;

备份A :mysqldump -uroot -p'XXXXXXX' -f --all-databases > all.sql
其中 -f 为跳过sql报错继续备份(很有必要),--all-databases 就是直接备份所有了

把all.sql 传到B
mysql> source /home/ubuntu/all.sql (进入数据库执行)
自己检查一下数据是否大差不差。

主从:

主:
配置文件:
server-id = 1
log-bin = /var/log/mysql/mysql-bin.log
改完配置需重启

给从机授权:

mysql>  grant all privileges on *.* to 'root'@'从机ip'  identified by 'xxxxx';
mysql> flush privileges;
mysql> show master status ;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 |  5795045 |              |                  |
+------------------+----------+--------------+------------------+


从机:
配置文件:
server-id   =   2
改完重启

认主:
mysql>slave stop;
mysql> change master to master_host='主机ip', master_user='root', master_password='xxxxx', master_log_file='mysql-bin.000002', master_log_pos=5795045  ;
Query OK, 0 rows affected (0.00 sec)
mysql>slave start;
Query OK, 0 rows affected (0.00 sec)



到这里就配置完成了
可查看状态:  
mysql> show slave status\G ; 
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: xxxxxxx
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 5834567
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 39775
        Relay_Master_Log_File: mysql-bin.000002
             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: 5834567
              Relay_Log_Space: 39932
              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
1 row in set (0.00 sec)

ERROR: 
No query specified

两个yes证明是好的,,如果操作没错,,基本都会是好的。

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