本文讲利用MySQL源码安装MySQL并用mysqld_multi配置多实例。

1、下载MySQL源码安装版本

到MySQL官网查找到相应版本下载,本文下载的是5.1版本

复制代码 代码如下:wget -c
ftp://ftp.mirrorservice.org/sites/ftp.mysql.com/Downloads/MySQL-5.1/mysql-5.1.60.tar.gz

2、解压安装

复制代码 代码如下: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、添加用户和用户组

复制代码 代码如下: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、初始化数据目录

复制代码
代码如下:#把用到的工具添加到/usr/bin目录 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、配置多实例启动脚本

从MySQL的源码中把复制到/etc/init.d/目录下

复制代码 代码如下: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、配置多实例数据库配置文件

用mysqld_multi工具查看该配置文件的模板方法,命令为:mysqld_multi
–example在/etc/目录下创建创建文件/etc/mysqld_multi.cnf,把mysqld_multi
–example产生的文件粘进去,修改相应属性,如:mysqld,mysqladmin,socket,port,pid-file,datadir,user等。复制代码 代码如下:[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、启动多实例数据库

复制代码
代码如下:将/usr/local/mysql/bin加到$PATH环境变量里 export
PATH=/usr/local/mysql/bin:$PATH #查看数据库状态 mysqld_multi
–defaults-extra-file=/etc/mysqld_multi.cnf report #结果都为没有运行
Reporting MySQL servers MySQL server from group: mysqld1 is not running
MySQL server from group: mysqld2 is not running MySQL server from group:
mysqld3 is not running MySQL server from group: mysqld4 is not running
#启动 mysqld_multi –defaults-extra-file=/etc/mysqld_multi.cnf start
#结果为 Reporting MySQL servers MySQL server from group: mysqld1 is not
running MySQL server from group: mysqld2 is not running MySQL server
from group: mysqld3 is not running MySQL server from group: mysqld4 is
not running #启动具体某一个实例可在start、stop后面加上具体数据1,2,3等

8、查看运行结果

复制代码
代码如下:#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、登录相应数据库

复制代码
代码如下:#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%’;

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