环境：
mysql> select version(); +------------+ | version() | +------------+ | 5.1.73-log | +------------+ 1 row in set (0.00 sec)
[root@10-4-14-168 ~]# cat /etc/redhat-release CentOS release 6.5 (Final)
1：已经事先购买了两台云主机
10.4.14.168 101.69.178.208 [联通] Master
10.4.5.9 101.69.178.219 [联通] Slave
2：分别安装MySQL
#yum install mysql-server –enablerepo=remi
#yum install mysql-devel
3：查看MySQL安装情况
[root@10-4-14-168 ~]# rpm -qa | grep mysql*
mysql-5.1.73-3.el6_5.x86_64
mysql-libs-5.1.73-3.el6_5.x86_64
mysql-server-5.1.73-3.el6_5.x86_64
mysql-devel-5.1.73-3.el6_5.x86_64
mysql-libs-5.1.73-3.el6_5.x86_64
mysql-server-5.1.73-3.el6_5.x86_64
mysql-devel-5.1.73-3.el6_5.x86_64
4：启动MySQL
service mysqld start
5：登陆MySQL并且修改密码并且删除空用户
mysql> UPDATE mysql.user SET password = PASSWORD('ge0513.mysql')
-> WHERE user = 'root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
mysql> SELECT user,host,password FROM mysql.user;
+------+-------------+-------------------------------------------+
| user | host | password |
+------+-------------+-------------------------------------------+
| root | localhost | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |
| root | 10-4-14-168 | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |
| root | 127.0.0.1 | *7AE39BE5035D5C32361400FF7DEDD757AA76896A |
| | localhost | |
| | 10-4-14-168 | |
+------+-------------+-------------------------------------------+
5 rows in set (0.00 sec)
mysql> DROP user ''@localhost;
Query OK, 0 rows affected (0.00 sec)
mysql> DROP user ''@'10-4-14-168';
Query OK, 0 rows affected (0.00 sec)
6 ：主库需改配置文件，在/etc/my.cnf中添加
port = 3306 log_bin = /var/lib/mysql/mysql-binlog server-id = 1 //只要主从不一样就行 binlog_do_db = test//要做同步的数据库名字，可以是多个数据库，之间用分号分割。
从库的配置文件中添加
server-id = 2 master-host = 10.4.14.168 master-user = gechong master-password = gechong master-port = 3306 master-connect-retry = 5 replicate-do-db = test
分别重启服务，登陆数据库。
7：主库上创建复制用户
GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO gechong@'%' IDENTIFIED BY 'gechong';
8：在主库上执行
mysql> show master status; +---------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +---------------+----------+--------------+------------------+ | binlog.000003 | 412 | | | +---------------+----------+--------------+------------------+ 1 row in set (0.00 sec)
从库上执行
mysql> show slave statusG
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.4.14.168
Master_User: gechong
Master_Port: 3306
Connect_Retry: 5
Master_Log_File: mysql-binlog.000001
Read_Master_Log_Pos: 325
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 473
Relay_Master_Log_File: mysql-binlog.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test
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: 325
Relay_Log_Space: 629
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)
可以看到：Slave_IO_Running | Slave_SQL_Running两个值都是YES，说明配置成功了。可以在主库的test库里执行DML或者DDL验证下。
如果同步不成功：
1：停掉从库 mysql> slave stop 2：主库上找到日志和位置 mysql> show master status; 3：手动同步 mysql> change master to > master_host='master_ip', > master_user='gechong', > master_password='gechong', > master_port=3306, > master_log_file='mysql-bin.000020', > master_log_pos=135617781; 1 row in set (0.00 sec) 4：启动从库 mysql> slave start; 1 row in set (0.00 sec)
如果有异常需要跳过：
>slave stop; >SET GLOBAL sql_slave_skip_counter = 1; >slave start;
主从搭建一般步骤：
