Home Database Mysql Tutorial MYSQL主从数据库同步备份配置的方法_MySQL

MYSQL主从数据库同步备份配置的方法_MySQL

May 30, 2016 pm 05:10 PM

下文分步骤给大家介绍的非常详细,具体详情请看下文吧。

一、准备

用两台服务器做测试:

Master Server: 192.0.0.1/Linux/MYSQL 4.1.12
Slave Server: 192.0.0.2/Linux/MYSQL 4.1.18  

    做主从服务器的原则是,MYSQL版本要相同,如果不能满足,最起码从服务器的MYSQL的版本必须高于主服务器的MYSQL版本

二、配置master服务器

1. 登录Master服务器,编辑my.cnf

#vim /etc/my.cnf

在[mysqld]段添加以下内容:

log-bin=mysql-bin
server-id=1
binlog-do-db=extmail
binlog-ignore-db=mysql,test
Copy after login

解释:log-bin项是让Master服务器记录二进制日志这个是必须的;
server-id=master_id 其中master_id必须为1到232–1之间的一个正整数值;
binlog-do-db=database 是要记录日志的数据库;
binlog-ignore-db 是不要记录日志的数据库名,多个数据库中间用逗号(,)隔开;

2.从master服务器添加要从slave服务器访问master服务器的有权限的帐号,看下面命令就知道了:

mysql> grant replication slave on *.*
-> to 'abc'@'192.0.0.2' identified by '123';

格式:mysql> GRANT REPLICATION SLAVE ON *.*
-> TO '帐号'@'从服务器IP或主机名' IDENTIFIED BY '密码';

3. 重起Mysql

4. 备份master数据库数据

# mysqldump --master-data extmail > extmail_backup_20071120.sql

要加--master-data 选项,这里备份master服务器的数据,后面要导入slave服务器。

5. 察看Master状态

mysql> show master status;
+------------------+----------+--------------+------------------+
| File       | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 |    79 | extmail   | mysql,test    |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
Copy after login

三、配置slave服务器

1. 编辑my.cnf

# vim /etc/my.cnf

在[mysqld]段添加以下内容:

server-id=2
master-host=192.0.0.1
master-port=3306
master-user=abc
master-password=123
master-connect-retry=60

解释:

slave服务器的server-id不能与master相同,多台slave之间server-id也不能相同。
master-host 是 master服务器的主机名或者IP地址
master-user和master-password是前面我们在master上建用户名和密码
master-connect-retry 是如果从服务器发现主服务器断掉,重新连接的时间差

2. 把从主数据库服务器备份出来的数据库导入到从服务器中,也就是我们前面的extmail_backup_20071120.sql

# mysqladmin create extmail
# mysql extmail < extmail_backup_20071120.sql

3. 重起mysql服务器

4. 停止slave服务,设置主服务器的各种参数

mysql> slave stop;
mysql> change master to
-> MASTER_HOST='192.0.0.1',
-> MASTER_USER='abc',
-> MASTER_PASSWORD='123',
-> MASTER_LOG_FILE='mysql-bin.000002',
-> MASTER_LOG_POS=79;
mysql> slave start;
Copy after login

5. 查看主从服务器的状态

mysql> show processlist;

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