使用mysqld_multi實現(xiàn)單系統(tǒng)中配置多個MySQL服務器實例

更新時間：2014年09月10日 15:54:13 投稿：junjie

這篇文章主要介紹了使用mysqld_multi實現(xiàn)單系統(tǒng)中配置多個MySQL服務器實例,mysqld_multi可用于在一臺物理服務器運行多個Mysql服務,mysqld_multi是管理多個mysqld的服務進程,這些服務進程程序不同的unix socket或是監(jiān)聽于不同的端口,需要的朋友可以參考下

本文講利用MySQL源碼安裝MySQL并用mysqld_multi配置多實例。

1、下載MySQL源碼安裝版本

到MySQL官網(wǎng)查找到相應版本下載，本文下載的是5.1版本

復制代碼代碼如下:

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

2、解壓安裝

復制代碼代碼如下:

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、添加用戶和用戶組

復制代碼代碼如下:

groupadd mysql #添加mysql用戶組  

useradd -g mysql mysql #創(chuàng)建mysql用戶并把它放到mysql組下  

chown -R root:mysql /usr/local/mysql #修改mysql文件屬性  

4、初始化數(shù)據(jù)目錄

復制代碼代碼如下:

#把用到的工具添加到/usr/bin目錄  

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  

#初始化四個數(shù)據(jù)目錄  

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  

#修改屬性  

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、配置多實例啟動腳本

從MySQL的源碼中把復制到/etc/init.d/目錄下

復制代碼代碼如下:

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

#修改basedir和bindir為安裝路徑  

basedir=/usr/local/mysql  

bindir=/usr/local/mysql/bin

6、配置多實例數(shù)據(jù)庫配置文件

用mysqld_multi工具查看該配置文件的模板方法，命令為：mysqld_multi --example
在/etc/目錄下創(chuàng)建創(chuàng)建文件/etc/mysqld_multi.cnf，把mysqld_multi --example產(chǎn)生的文件粘進去，修改相應屬性，如：mysqld,mysqladmin,socket,port,pid-file,datadir,user等。

復制代碼代碼如下:

[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、啟動多實例數(shù)據(jù)庫

復制代碼代碼如下:

將/usr/local/mysql/bin加到$PATH環(huán)境變量里  

export PATH=/usr/local/mysql/bin:$PATH  

#查看數(shù)據(jù)庫狀態(tài)  

mysqld_multi --defaults-extra-file=/etc/mysqld_multi.cnf report  

#結(jié)果都為沒有運行  

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  

#啟動  

mysqld_multi --defaults-extra-file=/etc/mysqld_multi.cnf start  

#結(jié)果為  

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  

#啟動具體某一個實例可在start、stop后面加上具體數(shù)據(jù)1,2,3等

8、查看運行結(jié)果

復制代碼代碼如下:

#查看相應端口是否已經(jīng)被監(jiān)聽  

netstat -tunlp  

#查看是否有活動進程  

ps -aux|grep mysql

9、登錄相應數(shù)據(jù)庫

復制代碼代碼如下:

#進入端口為3306的數(shù)據(jù)庫  

mysql -uroot -p -h127.0.0.1 -P3306  

#通過sock文件登錄  

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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