mysql 配置主从

1、选择2个ip，1个为主，1个为从：

   例：

  
主：192.168.12.76  从：192.168.12.77

2、在192.168.12.76的my.cnf 配置master,添加如下：(红色为添加的内容)

#vi my.cnf

[mysqld]

basedir=/export/servers/mysql

datadir=/export/servers/mysql/data

log-error=/export/servers/mysql/mysql_error.log

pid-file=/export/servers/mysql/mysql.pid

user=mysql

tmpdir=/tmp
log-bin=master-bin

log-bin-index=master-bin.index

server-id=1

   

在192.168.12.77的my.cnf 配置slave,添加如下：（红色为添加内容）

#vi my.cnf

[mysqld]

basedir=/export/servers/mysql

datadir=/export/servers/mysql/data

log-error=/export/servers/mysql/mysql_error.log

pid-file=/export/servers/mysql/mysql.pid

user=mysql

tmpdir=/tmp
server-id=2

relay-log-index=slave-relay-bin.index

relay-log=slave-relay-bin

3、重启两台服务器的mysql:

    
#./mysql restart

4、在主服务器上建立账户并授权slave：

   mysql>use mysql;

   mysql> create user
master;

   mysql>grant replication
slave on *.* to master identified by
'123456';      
(GRANT REPLICATION SLAVE ON *.* to 'master'@'%' identified by
'q123456';)

5、查询master状态：

    show master
status;

   
+------------------+----------+--------------+------------------+

    |
File            
| Position | Binlog_Do_DB | Binlog_Ignore_DB |

   
+------------------+----------+--------------+------------------+

    |
mysql-bin.000004
|     308
|             
|                 
|

   
+------------------+----------+--------------+------------------+

6、配置从服务器slave：

    mysql>use
mysql;

    mysql>
change master to
master_host='192.168.12.76',master_port=3306,master_user='master',master_password='123456',master_log_file='mysql-bin.000004',master_log_pos=308;

   
mysql>flush privileges;

   
mysql>show slave status\G

   
mysql>slave start;

      
Slave_IO_Running:
Yes      
//此状态必须YES

      
Slave_SQL_Running:
Yes      
//此状态必须YES

      
Read_Master_Log_Pos:
600       
//#同步读取二进制日志的位置，大于等于>=Exec_Master_Log_Pos

 7、在主库上创建一个数据库，在从库查看是否存在，存在为ok。