Configure multiple Mysql server instances with the Mysqld_multi implementation single system _mysql

This article is about using MySQL source to install MySQL and configure multiple instances with Mysqld_multi.

1, download the MySQL source installation version

To MySQL website to find the appropriate version of the download, this article is downloaded version 5.1

Copy Code code as follows:

Wget-c ftp://ftp.mirrorservice.org/sites/ftp.mysql.com/Downloads/MySQL-5.1/mysql-5.1.60.tar.gz

2, decompression installation

Copy Code code as follows:

Tar-zxv-f mysql-5.1.60.tar.gz

./configure--prefix=/usr/local/mysql--with-charset=utf8
--with-extra-charset=all--enable-thread-safe-client--enable-assembler
--with-readline--with-big-tables
--with-named-curses-libs=/usr/lib/libncursesw.so.5

Make && make install

3. Add Users and user groups

Copy Code code as follows:

Groupadd MySQL #添加mysql用户组
useradd-g MySQL MySQL #创建mysql用户并把它放到mysql组下
Chown-r Root:mysql/usr/local/mysql #修改mysql文件属性

4, Initialization Data directory

Copy Code code as follows:

#把用到的工具添加到/usr/bin Directory
Ln-s/usr/local/mysql/bin/mysqld_multi/usr/bin/mysqld_multi
Ln-s/usr/local/mysql/bin/mysql_install_db/usr/bin/mysql_install_db

#初始化四个数据目录
mysql_install_db--DATADIR=/USR/LOCAL/VAR/MYSQL1--user=mysql
mysql_install_db--DATADIR=/USR/LOCAL/VAR/MYSQL2--user=mysql
mysql_install_db--datadir=/usr/local/var/mysql3--user=mysql
mysql_install_db--datadir=/usr/local/var/mysql4--user=mysql

#修改属性
Chown-r MYSQL/USR/LOCAL/VAR/MYSQL1
Chown-r MYSQL/USR/LOCAL/VAR/MYSQL2
Chown-r Mysql/usr/local/var/mysql3
Chown-r MYSQL/USR/LOCAL/VAR/MYSQL4

5. Configure multiple instance startup scripts

Copy from MySQL source to/etc/init.d/directory

Copy Code code as follows:

Cp/usr/local/src/mysql-5.1.60/support-files/mysqld_multi.server/etc/init.d/mysqld_multi.server

#修改basedir和bindir为安装路径
Basedir=/usr/local/mysql
Bindir=/usr/local/mysql/bin

6. Configure multiple instance database configuration files

Use the Mysqld_multi tool to view the template method for this profile, which is: Mysqld_multi--example
Create a file in the/etc/directory/etc/mysqld_multi.cnf, glue the Mysqld_multi--example the resulting files, and modify the corresponding attributes, such as: Mysqld,mysqladmin,socket,port, Pid-file,datadir,user and so on.

Copy Code code as follows:

[Mysqld_multi]
Mysqld =/usr/local/mysql/bin/mysqld_safe
Mysqladmin =/usr/local/mysql/bin/mysqladmin
#user = MySQL
#password = My_password

[Mysqld1]
Socket =/usr/local/var/mysql1/mysql1.sock
Port = 3306
Pid-file =/usr/local/var/mysql1/mysql1.pid
DataDir =/USR/LOCAL/VAR/MYSQL1
#language =/usr/local/mysql/share/mysql/english
user = MySQL

[Mysqld2]
Socket =/usr/local/var/mysql2/mysql2.sock
Port = 3307
Pid-file =/usr/local/var/mysql2/mysql2.pid
DataDir =/usr/local/var/mysql2
#language =/usr/local/mysql/share/mysql/english
user = MySQL

[MYSQLD3]
Socket =/usr/local/var/mysql3/mysql3.sock
Port = 3308
Pid-file =/usr/local/var/mysql3/mysql3.pid
DataDir =/usr/local/var/mysql3
#language =/usr/local/mysql/share/mysql/english
user = MySQL

[Mysqld4]
Socket =/usr/local/var/mysql4/mysql4.sock
Port = 3309
Pid-file =/usr/local/var/mysql4/mysql4.pid
DataDir =/usr/local/var/mysql4
#language =/usr/local/mysql/share/mysql/english
user = MySQL

7. Start multi-instance database

Copy Code code as follows:

Add/usr/local/mysql/bin to the $PATH environment variable.
Export Path=/usr/local/mysql/bin: $PATH

#查看数据库状态
Mysqld_multi--defaults-extra-file=/etc/mysqld_multi.cnf
#结果都为没有运行
Reporting MySQL Servers
MySQL server from Group:mysqld1 isn't running
MySQL server from Group:mysqld2 isn't running
MySQL server from group:mysqld3 isn't running
MySQL server from GROUP:MYSQLD4 isn't running

#启动
Mysqld_multi--defaults-extra-file=/etc/mysqld_multi.cnf Start
#结果为
Reporting MySQL Servers
MySQL server from Group:mysqld1 isn't running
MySQL server from Group:mysqld2 isn't running
MySQL server from group:mysqld3 isn't running
MySQL server from GROUP:MYSQLD4 isn't running

#启动具体某一个实例可在start, after the stop plus specific data 1,2,3, etc.

8, view the results of the operation

Copy Code code as follows:

#查看相应端口是否已经被监听
Netstat-tunlp

#查看是否有活动进程
Ps-aux|grep MySQL

9, login to the corresponding database

Copy Code code as follows:

#进入端口为3306的数据库
Mysql-uroot-p-h127.0.0.1-p3306

#通过sock文件登录
Mysql-uroot-p-s/usr/local/var/mysql1/mysql1.sock

#查看socket文件
Mysql> show VARIABLES like ' socket ';

#查看pid文件
Mysql> show VARIABLES like '%pid% ';