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