mysql多实例配置

多实例MYSQL

优点:分开便于管理,使用多配置文件方式
缺点:争夺资源

#1.创建多个数据目录 自定义目录
[root@db01 ~]# mkdir /data/{3307,3308,3309} -p
[root@db01 data]# tree /data
    /data
    ├── 3307
    ├── 3308
    └── 3309
#2.准备多个配置文件
[root@db01 data]# vim /data/3307/my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/data/3307/data
port=3307
socket=/data/3307/mysql.sock
log-error=/data/3307/data/mysql.err
log-bin=/data/3307/data/mysql-bin
server_id=7

-------------------------------------------

[root@db01 data]# vim /data/3308/my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/data/3308/data
port=3308
socket=/data/3308/mysql.sock
log-error=/data/3308/data/mysql.err
log-bin=/data/3308/data/mysql-bin
server_id=8

--------------------------------------------
[root@db01 data]# vim /data/3309/my.cnf 
[mysqld]
basedir=/usr/local/mysql
datadir=/data/3309/data
port=3309
socket=/data/3309/mysql.sock
log-error=/data/3309/data/mysql.err
log-bin=/data/3309/data/mysql-bin
server_id=9

---------------------------------------------

[root@db01 data]# tree /data/
    /data/
    ├── 3307
    │   └── my.cnf
    ├── 3308
    │   └── my.cnf
    └── 3309
        └── my.cnf
#3.初始化多套数据目录

3307:
[root@db01 scripts]# ./mysql_install_db --defaults-file=/data/3307/my.cnf --user=mysql --basedir=/usr/local/mysql --datadir=/data/3307/data

3308:
[root@db01 scripts]# ./mysql_install_db --defaults-file=/data/3308/my.cnf --user=mysql --basedir=/usr/local/mysql --datadir=/data/3308/data

3309:
[root@db01 scripts]# ./mysql_install_db --defaults-file=/data/3309/my.cnf --user=mysql --basedir=/usr/local/mysql --datadir=/data/3309/data

#4.授权
[root@db01 scripts]# chown -R mysql.mysql /data

#5.启动MySQL多实例
[root@db01 scripts]# mysqld_safe --defaults-file=/data/3307/my.cnf &
[root@db01 scripts]# mysqld_safe --defaults-file=/data/3308/my.cnf &
[root@db01 scripts]# mysqld_safe --defaults-file=/data/3309/my.cnf &

#6.检查端口
[root@db01 scripts]# netstat -lntup|grep 330
tcp6       0      0 :::3307                 :::*                    LISTEN      25550/mysqld        
tcp6       0      0 :::3308                 :::*                    LISTEN      25722/mysqld        
tcp6       0      0 :::3309                 :::*                    LISTEN      25894/mysqld     

#7.设置多实例密码
[root@db01 scripts]# mysqladmin -uroot -S /data/3307/mysql.sock password '3307'
[root@db01 scripts]# mysqladmin -uroot -S /data/3308/mysql.sock password '3308'
[root@db01 scripts]# mysqladmin -uroot -S /data/3309/mysql.sock password '3309'

#8.验证库连接( 查看server_id )
[root@db01 scripts]# mysql -uroot -p3307 -S /data/3307/mysql.sock -e "show variables like 'server_id';"Warning: Using a password on the command line interface can be insecure.
        +---------------+-------+
        | Variable_name | Value |
        +---------------+-------+
        | server_id     | 7     |
        +---------------+-------+

[root@db01 scripts]# mysql -uroot -p3308 -S /data/3308/mysql.sock -e "show variables like 'server_id';"Warning: Using a password on the command line interface can be insecure.
        +---------------+-------+
        | Variable_name | Value |
        +---------------+-------+
        | server_id     | 8     |
        +---------------+-------+

[root@db01 scripts]# mysql -uroot -p3309 -S /data/3309/mysql.sock -e "show variables like 'server_id';"Warning: Using a password on the command line interface can be insecure.
        +---------------+-------+
        | Variable_name | Value |
        +---------------+-------+
        | server_id     | 9     |
        +---------------+-------+
连接的小技巧:
[root@db01 scripts]# vim /usr/bin/mysql3309
mysql -uroot -p3309 -S /data/3309/mysql.sock

[root@db01 scripts]# vim /usr/bin/mysql3308
mysql -uroot -p3308 -S /data/3308/mysql.sock

[root@db01 scripts]# vim /usr/bin/mysql3307
mysql -uroot -p3307 -S /data/3307/mysql.sock

[root@db01 scripts]# chmod +x /usr/bin/mysql*

连接:[root@db01 scripts]# mysql3309