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环境是先前配置lnmp+keepalived负载均衡的2台机器，IP分别是10.10.10.13和10.10.10.14.
1，登录系统
Last login: Sun Jul 24 23:36:55 2016 from 10.10.10.1
[root@hd3 ~]# netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 9471/php-fpm
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 9362/mysqld
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 11021/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1961/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 1821/cupsd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2115/master
tcp 0 0 :::22 :::* LISTEN 1961/sshd
tcp 0 0 ::1:631 :::* LISTEN 1821/cupsd
tcp 0 0 ::1:25 :::* LISTEN 2115/master
注：主从机器mysql版本一致，并都已经初始化表并设置了root口令。
2、修改主从服务器配置文件的2个字段
#vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin //启用二进制日志
server-id=1 //服务器唯一ID，默认是1，这里主的用的默认，从服务器改为2。之后
# service mysqld restart
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
3，在主服务器上建立帐户并授权slave:
#mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql>GRANT REPLICATION SLAVE ON *.* to ‘sync‘@‘%‘ identified by ‘123456‘;
查询master的状态，记录下 FILE 及 Position 的值
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 251 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
4，配置从服务器
# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.73-log Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql> change master to master_host=‘10.10.10.13‘,master_user=‘sync‘,master_password=‘123456‘,master_log_file=‘my
sql-bin.000002‘,master_log_pos=251;
Query OK, 0 rows affected (0.03 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.10.10.13
Master_User: mysync
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 251
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 251
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: 251
Relay_Log_Space: 407
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)
关键是Slave_IO及Slave_SQL进程一定要都YES
5，主从复制测试
先在主mysql上：
mysql> create database fuck;
Query OK, 1 row affected (0.03 sec)
mysql> use fuck;
Database changed
mysql>
mysql>
mysql> create table fuck(id int(3),name char(10));
Query OK, 0 rows affected (0.08 sec)
mysql>
mysql>
mysql> insert into fuck values(001,‘abcd‘);
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| fuck |
| mysql |
| test |
+--------------------+
4 rows in set (0.03 sec)
mysql>
再登录从mysql，主服务器上新增的数据都出来了
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| fuck |
| mysql |
| test |
+--------------------+
4 rows in set (0.02 sec)
mysql> use fuck;
Database changed
mysql> select * from fuck;
+------+------+
| id | name |
+------+------+
| 1 | abcd |
+------+------+
1 row in set (0.00 sec)
mysql>
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原文地址：http://www.cnblogs.com/iamqiu/p/5721283.html
