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服务器名 IP 系统 MySQL
odd.example.com 192.168.1.116 rhel-5.8 5.5.16
even.example.com 192.168.1.115 rhel-5.8 5.5.16

假设要同步的库是 db_rocky
㈠ 创建同步用户
在 ODD上

mysql> grant replication slave on *.* to 'water'@'192.168.1.115' identified by 'cdio2010';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

在 EVEN 上

mysql> grant replication slave on *.* to 'water'@'192.168.1.116' identified by 'cdio2010';
Query OK, 0 rows affected (0.11 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

㈡ 修改 /etc/my.cnf 配置文件,为其添加以下内容:
在 ODD 上

[mysqld]
binlog-do-db=db_rocky #需要记录进制日志的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项
binlog-ignore-db=mysql #不需要记录进制日志的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项
replicate-do-db=db_rocky #需要进行同步的数据库.如果有多个数据库可用逗号分隔,或者使用多个replicate-do-db选项
replicate-ignore-db=mysql,information_schema #不需要同步的数据库.如果有多个数据库可用逗号分隔,或者使用多个replicate-ignore-db选项
#同步参数:
#保证slave挂在任何一台master上都会接收到另一个master的写入信息
log-slave-updates
sync_binlog=1
auto_increment_offset=1
auto_increment_increment=2
slave-skip-errors=all #过滤掉一些没啥大问题的错误

在 EVEN 上

[mysqld]
server-id=2 #设置一个不同的id、注意这里在my.cnf里面有个默认值是 1 、把默认值改掉、而不能新增一个server-id
binlog-do-db=db_rocky #需要记录二进制日志的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项
binlog-ignore-db=mysql #不需要记录进制日志的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-ignore-db选项
#需要同步的数据库
replicate-do-db=db_rocky #需要进行同步的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项
replicate-ignore-db=mysql,information_schema #不需要同步的数据库.如果有多个数据库可用逗号分隔,或者使用多个binlog-do-db选项
#同步参数:
#保证slave挂在任何一台master上都会接收到另一个master的写入信息
log-slave-updates
sync_binlog=1
auto_increment_offset=2
auto_increment_increment=2
slave-skip-errors=all #过滤掉一些没啥大问题的错误

㈢ 分别重启服务器ODD EVEN 上的mysql服务
㈣ 分别在服务器ODD、EVEN 上查看做为主服务器状态
在ODD

mysql> flush tables with read lock;#防止进入新的数据
Query OK, 0 rows affected (0.00 sec)
mysql> show master status/G;
*************************** 1. row ***************************
File: mysql-bin.000007
Position: 438
Binlog_Do_DB: db_rocky
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)

在EVEN

mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status/G;
*************************** 1. row ***************************
File: mysql-bin.000008
Position: 107
Binlog_Do_DB: db_rocky
Binlog_Ignore_DB: mysql
1 row in set (0.01 sec)

㈤ 分别在服务器ODD、EVEN上用change master语句指定同步位置 :
在ODD

mysql> change master to master_host='192.168.1.115',master_user='water',master_password='cdio2010',
-> master_log_file='mysql-bin.000008',master_log_pos=107;
Query OK, 0 rows affected (0.05 sec)

在EVEN

mysql> change master to master_host='192.168.1.116',master_user='water',master_password='cdio2010',
-> master_log_file='mysql-bin.000007',master_log_pos=438;
Query OK, 0 rows affected (0.15 sec)

注:master_log_file,master_log_pos由上面主服务器查出的状态值中确定
master_log_file对应File,master_log_pos对应Position
在ODD EVEN上

mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)

㈥ 分别在服务器ODD、EVEN上启动从服务器线程

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

分别在服务器ODD、EVEN上查看从服务器状态 :

ODD上
mysql> show slave status/G;
*************************** 1. row ***************************
主要关注以下 2 个参数:
...
...
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
...
...
EVEN上:
mysql> show slave status/G;
*************************** 1. row ***************************
主要关注以下 2 个参数:
...
...
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
...
...

㈦ 测试

EVEN 上
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| db_rocky |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
mysql> use db_rocky;
Database changed
mysql> show tables;
Empty set (0.00 sec)
mysql> create table water (id int);
Query OK, 0 rows affected (0.04 sec)
mysql> insert into water values(1);
Query OK, 1 row affected (0.01 sec)
mysql> commit;
Query OK, 0 rows affected (0.00 sec)
在 ODD 上
mysql> show tables;
+--------------------+
| Tables_in_db_rocky |
+--------------------+
| t_rocky |
| water |
+--------------------+
2 rows in set (0.00 sec)
mysql> select * from water;
+------+
| id |
+------+
| 1 |
+------+
1 row in set (0.00 sec)
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