数据库主从

主库  ip：192.168.1.66
从库  ip:192.168.1.67

主机：
1）创建一个slave用户，并且赋予权限
grant replication slave,reload,super on *.* to 'slave'@'%' identified by '123456';
flush privileges;
2)更改配置文件（/etc/my.cnf 放在[mysqld]下面）

server-id               = 1    #主机标示，整数
log-bin                 = mysql-binlog   #确保此文件可写
read-only              =0  #主机，读写都可以
binlog-do-db         =1309phpb   #需要备份数据，多个写多行
binlog-ignore-db    =mysql #不需要备份的数据库，多个写多行


3)重启mysql
service  mysqld  restart
4)查看主库的状态
在mysql中：show  master  status\G

mysql> show  master  status\G;
*************************** 1. row ***************************
            File: mysql-binlog.000003
        Position: 271
    Binlog_Do_DB: 1309phpb
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)

ERROR:
No query specified


出现这样的提示，说明主库配置没有什么问题了


5）查看主库日志开始
mysql> show  master  status;
+---------------------+----------+--------------+------------------+
| File                | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000003 |      271 | 1309phpb     | mysql            |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)



&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
二)从库的配置

1）修改从库配置文件（vi  /etc/my.cnf）
server-id               = 2
log-bin                 = mysql-binlog
master-host     =192.168.1.66
master-user     =slave
master-pass     =123456
master-port     =3306
master-connect-retry=60 #如果从服务器发现主服务器断掉，重新连接的时间差(秒)
replicate-do-db =lvs #只复制某个库
replicate-ignore-db=mysql #不复制某个库


2)重启mysql服务

3）进入mysql 更改主库参数

change master to master_host='192.168.1.66',master_user='slave',master_password='123456',master_log_file='File字段的值',master_log_pos=Position 字段值;

查看主库日志开始
mysql>     show  master  status;
+---------------------+----------+--------------+------------------+
| File                | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000003 |      271 | 1309phpb     | mysql            |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

4）重启进程
start  slave

5)查看从库的的状态
show   slave  status\G

 show  slave  status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.51
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-binlog.000003
          Read_Master_Log_Pos: 271
               Relay_Log_File: localhost-relay-bin.000004
                Relay_Log_Pos: 419
        Relay_Master_Log_File: mysql-binlog.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 1309phpb
          Replicate_Ignore_DB: mysql
           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: 271
              Relay_Log_Space: 578
              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:
1 row in set (0.00 sec)


6)此时可以从主库添加数据，从库查询数据了