Mysql主主同步-配置数据同步

Mysql主主同步数据

 

一、环境
192.168.1.1  MysqlA
192.168.1.2    MysqlB

二,安装配置
1.安装mysql省略,MysqlA和MysqlB版本保持一致就可以了!
2.配置mysql

1)在两台机器上给对方授权
MysqlA
GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO [email protected] IDENTIFIED BY 'ICE02FREE03';

MysqlB
GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO [email protected] IDENTIFIED BY 'ICE02FREE03';

flush privileges;

2)配置主配置文件

在MysqlA上

[mysqld]
server-id = 10
log-bin = mysql-bin
log-slave-updates
auto-increment-increment = 2
auto-increment-offset = 1
#要同步的库名
replicate-do-db = test

在MysqlB上

[mysqld]
server-id = 20
log-bin = mysql-bin
log-slave-updates
auto-increment-increment = 2
auto-increment-offset = 2
#要同步的库名
replicate-do-db = test

注:二库都只有server-id不同和auto-increment-offset不同:
    auto-increment-offset是用来设定数据库中自动增长的起点的,回为这两能服务器都设定了一次自动增长值2,所以它们的起点必须得不同,这样才能避免两台服务器数据同步时出现主键冲突
    replicate-do-db 指定同步的数据库,我们只在两台服务器间同步test数据库
另:auto-increment-increment的值应设为整个结构中服务器的总数,本案例用到两台服务器,所以值设为2

配置完成后,重启两台数据库
service mysqld restart

3)同步两台数据库

首先先在两台数据库上创建要同步的数据库
create database test;

分别在两台数据库中,执行下命令,查看potion,以及binlog。
MysqlA上面执行
mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |   157485 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

MysqlB上面执行
mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 |    10465 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)


##在 MysqlA 上
stop slave;
CHANGE MASTER TO master_host='192.168.1.2', master_user='backmysql', master_password='ICE02FREE03', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=10465;
start slave;

##在 MysqlB 上
stop slave;
CHANGE MASTER TO master_host='192.168.1.1', master_user='backmysql', master_password='ICE02FREE03', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=157485;
start slave;

##分别查看两台数据库的slave状态。

mysql> show slave status\G;

Slave_IO_Running: Yes
Slave_SQL_Running: Yes

##都为yes就ok了

4)验证mysql主主

###好了现在我们来验证吧

在MysqlA的mysqldb数据库中创建表

create table test (name varchar(15) not null,city varchar(15) not null,birth date not null);

在MysqlB的mysqldb数据库中能够查看到该表

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| test           |
+----------------+
1 row in set (0.00 sec)

在MysqlB中向表test插入数据

insert into test values ("lequ","shanghai","2012-10-10");

在MysqlA中查看表test

mysql> select * from test;
+------+----------+------------+
| name | city     | birth      |
+------+----------+------------+
| lequ | shanghai | 2012-10-10 |
+------+----------+------------+
1 row in set (0.00 sec)

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