Mysql多实例配置

Mysql多实例配置

1.什么是多实例?

在linux系统中代表:多个进程+多个线程+多个预分配内存结构

一般用来测试环境中,测试主从,高可用等。

多实例配置方案:(多个数据库管理系统)

    端口port分开
 
    配置文件分开
 
    socket分开
 
    日志分开
 
    多serverid
 
    都可以使用mysql用户
 
    #总结,初始化多次数据库
2.多实例实战
#1.创建多个数据目录
[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

 #### 在5.7版本中 mysqld --initialize-insecure 进行初始化

#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.关闭多实例
[root@db01 scripts]# mysqladmin -S /data/3307/mysql.sock shutdown
[root@db01 scripts]# mysqladmin -S /data/3308/mysql.sock shutdown
[root@db01 scripts]# mysqladmin -S /data/3309/mysql.sock shutdown
 
#7.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     
		
#8.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'

#9.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

posted @ 2019-07-11 10:09  Beua  阅读(2512)  评论(0编辑  收藏  举报