mysql多实例配置

在实际的开发过程中，可能会需要在一台服务器上部署多个MYSQL实例，那建议使用MYSQL官方的解决方案 mysqld_multi

1.修改my.cnf

如一个定义两个实例的参考配置：

[mysqld_multi] mysqld = /usr/local/mysql/bin/mysqld_safe mysqladmin = /usr/local/mysql/bin/mysqladmin user = your_user password = your_password [mysqld1] datadir = /data/db/my1 #连接 port = 3306 socket = /tmp/mysql3306.sock #binlog log-bin=/data/db/mylog1/mysql-bin binlog_format=mixed binlog_cache_size = 32M expire_logs_days = 30 [mysqld2] datadir = /data/db/my2 #连接 port = 3307 socket = /tmp/mysql3307.sock #binlog log-bin=/data/db/mylog2/mysql-bin binlog_format=mixed binlog_cache_size = 32M expire_logs_days = 3 

 

2.创建数据目录

mkdir -p /data/db/my21 mkdir -p /data/db/my2 chown mysql.mysql /data/db/my1 -R chown mysql.mysql /data/db/my2 -R 

3.初始化DB

/usr/local/mysql/scripts/mysql_install_db --datadir=/data/db/my1/ -uroot (mysql_install_db也是MYSQL官方自带工具) /usr/local/mysql/scripts/mysql_install_db --datadir=/data/db/my2/ -uroot chown mysql.mysql /data/db/my1/ -R chown mysql.mysql /data/db/my2/ -R 

4. 安装工具

cp /usr/local/mysql/bin/my_print_defaults /usr/bin/ 
cp /usr/local/mysql/bin/mysqld_multi /usr/bin/ 

5.创建、授权用户

CREATE USER "your_user"@"192.168.45.127%" IDENTIFIED BY 'your_password'; GRANT ALL PRIVILEGES ON *.* TO "your_user"@"192.168.1.%"; flush privileges; 

 

至此，mysql多实例配置已经完毕。我们看到多个不同的MYSQL实例是共用my.cnf的。多实例命令行管理：

1.mysql启动

mysqld_multi start 1 启动实例1 mysqld_multi start 1-2 启动实例1,2

2.mysql重启

mysqld_multi restart 1 重启实例1 mysqld_multi restart 1-2 重启实例1,2 

3.mysql关闭

mysqld_multi stop 1 关闭实例1 mysqld_multi stop 1-2 关闭实例1,2 

4.命令行登陆实例2

mysql -u your_user -p your_password -P3307 -S /tmp/mysql3307.sock