同时运行两个mysql实例

1. 修改/etc/mysql/my.cnf

加入

[mysqld_multi]

mysqld = /usr/bin/mysqld_safe

mysqladmin = /usr/bin/mysqladmin

user = multi_admin

password = multipass

把原来的[mysqld]改成[mysqld001]，并加入[mysqld002]，分别配置两个实例，主要是下面这些设置要不同：

pid-file

socket

port

datadir

2. 设置用户

$ mysql -u root -S /var/run/mysqld/mysqld.sock -p

> GRANT SHUTDOWN ON *.* TO 'multi_admin'@'localhost' IDENTIFIED BY 'multipass';

$ mysql -u root -S /var/run/mysqld/mysqld2.sock -p

> GRANT SHUTDOWN ON *.* TO 'multi_admin'@'localhost' IDENTIFIED BY 'multipass';

3. 测试启动停止命令

$ mysqld_multi --no-log --config-file=/etc/mysql/my.cnf start 001,002

$ mysqld_multi --no-log --config-file=/etc/mysql/my.cnf stop 001,002

$ mysqld_multi --no-log --config-file=/etc/mysql/my.cnf report 001,002

4. 新建启动脚本 /etc/init.d/mysql-multi替换原来的启动脚本/etc/init.d/mysql

5. 修改/etc/phpmyadmin/config.inc.php，配置如何连接这两个服务器

$i = 0;

$i++;

$cfg['Servers'][$i]['host'] = 'localhost';

$cfg['Servers'][$i]['socket'] = '/var/run/mysqld/mysqld.sock';

$cfg['Servers'][$i]['connect_type'] = 'socket';

$cfg['Servers'][$i]['verbose'] = 'localhost:3306';

$i++;

$cfg['Servers'][$i]['host'] = 'localhost';

$cfg['Servers'][$i]['socket'] = '/var/run/mysqld/mysqld2.sock';

$cfg['Servers'][$i]['connect_type'] = 'socket';

$cfg['Servers'][$i]['verbose'] = 'localhost:3307';