安装mysql

初始化两个数据库目录

mysql_install_db --datadir=/usr/local/var/mysql1 --user=mysql

mysql_install_db --datadir=/usr/local/var/mysql2 --user=mysql

修改数据库目录属性

chown -R mysql /usr/local/var/mysql1

chown -R mysql /usr/local/var/mysql2

制作多实例启动服务

cp  /usr/share/mysql/mysqld_multi.server /etc/init.d/mysqld_multi.server

创建配置文件

vi /etc/mysql/mysqld_multi.cnf

[mysqld_multi]

mysqld  = /usr/bin/mysqld_safe

mysqladmin  = /usr/bin/mysqladmin

[mysqld3306]

port            = 3306

socket          = /var/run/mysqld/mysqld3306.sock

pid-file        =/var/run/mysqld/mysqld3306.pid

datadir         = /usr/local/var/mysql1

user            =mysql

[mysqld3307]

port            = 3307

socket          = /var/run/mysqld/mysqld3307.sock

pid-file        =/var/run/mysqld/mysqld3307.pid

datadir         = /usr/local/var/mysql2

user            =mysql

启动多实例

启动全部实例

mysqld_multi --defaults-file=/etc/mysql/mysqld_multi.cnf start

启动指定实例

mysqld_multi --defaults-file=/etc/mysql/mysqld_multi.cnf start 3306

关闭

关闭全部实例

mysqld_multi --defaults-file=/etc/mysql/mysqld_multi.cnf stop

关掉指定实例

mysqld_multi --defaults-file=/etc/mysql/mysqld_multi.cnf stop 3306

连接

mysql -uroot -S /var/run/mysqld/mysqld3306.sock

mysql -uroot -S /var/run/mysqld/mysqld3307.sock