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mysql主从同步快速设置方法

Jun 07, 2016 pm 06:03 PM

记录一个比较简便的mysql的主从同步设置步骤,方便日后使用。

安装环境
centos 5.4
mysql 5.1.xx 采用rpm直接安装
xtrabackup 1.2.22 采用rpm直接安装
代码如下:
[mysqld]
server-id = 1
log-bin
innodb_flush_log_at_trx_commit=1
sync_binlog=1
datadir=/var/lib/mysql
character-set-server=utf8
init_connect='SET NAMES utf8'

设定了默认字符集为utf8,可以按实际情况取舍这段配置。

2. Slave:/etc/my.cnf
代码如下:
[mysqld]
server-id=2
datadir=/var/lib/mysql
character-set-server=utf8
init_connect='SET NAMES utf8'

3. Master:在master数据库设置用来同步的slave用户权限
代码如下:
GRANT REPLICATION SLAVE ON *.*
TO ''@''
IDENTIFIED BY '';

4. Master:导出数据到slave
采用xtrabackup来备份mysql,好处是在master的锁表时间很短,在实际的生产环境也可以使用,并且xtrabackup会自动记录同步日志文件的位置。
代码如下:
sudo innobackupex-1.5.1 --stream=tar /tmp/ | ssh "mkdir /tmp/db; tar xfi - -C /tmp/db/"

这个步骤会把master的数据包括表结构整个导出并压缩复制给slave,同时解压到slave的/tmp/db目录下。

5. Slave:导入数据到slave
代码如下:
innobackupex-1.5.1 --apply-log /tmp/db
innobackupex-1.5.1 --copy-back /tmp/db
chown -R mysql.mysql /var/lib/mysql/*

6. Slave:开始同步数据
查看/var/lib/mysql/xtrabackup_binlog_info,获得日志文件以及position。
代码如下:
CHANGE MASTER TO
MASTER_HOST='',
MASTER_USER='',
MASTER_PASSWORD='',
MASTER_LOG_FILE='',
MASTER_LOG_POS=;
START SLAVE;

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