Mysql配置主从数据库

一、准备两台数据库服务器

master：192.168.9.119

slave：192.168.9.122

 

二、master配置

 找到数据库配置文件my.cnf

vi /etc/my.cnf

　　添加配置：

log-bin=mysql-bin
server-id=119

　　创建用于同步的账号并授权：

create user 'replicate'@'192.168.9.122' identified by 'slave';
grant replication slave on *.* to 'replicate'@'192.168.9.122';
flush privileges;

　　查看master状态，记录二进制文件名(mysql-bin.000012)和位置(120)：

show master status;

+------------------+----------+--------------+---------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                            | Executed_Gtid_Set |
+------------------+----------+--------------+---------------------------------------------+-------------------+
| mysql-bin.000012 |      120 | test         | mysql,information_schema,performance_schema |                   |
+------------------+----------+--------------+---------------------------------------------+-------------------+
1 row in set (0.00 sec)

　　

三、slave配置

找到数据库配置文件my.cnf，添加配置

server-id=122

　　重启mysql服务器

service mysql restart

　　执行同步SQL语句(需要主服务器主机名，登陆凭据，二进制文件的名称和位置)：

mysql> change master to
    -> master_host='192.168.9.119',
    -> master_user='replicate',
    -> master_password='slave',
    -> master_log_file='mysql-bin.000012',
    -> master_log_pos=120;

　　启动slave同步进程：

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

　　查看slave状态：

　　

mysql> show slave status G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.9.119
                  Master_User: replicate
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000012
          Read_Master_Log_Pos: 3374
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 3537
        Relay_Master_Log_File: mysql-bin.000012
             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: 3374
              Relay_Log_Space: 3714
              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: 119
                  Master_UUID: 59d3c4a8-1099-11e9-8f19-080027e17b36
             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 slave 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