mysql 多实例配置

1、下载MySQL源码安装版本

 
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

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 
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
 

cp /usr/local/mysql/share/mysql/my-medium.cnf /usr/local/mysql/var/my.cnf
      //手动创建/usr/local/mysql/var目录  
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld  
chkconfig --add mysqld  
chkconfig --level 2345 mysqld on  
chown mysql:mysql -R /usr/local/mysql/  
service mysqld start  
ln -s /usr/local/mysql/bin/mysql /sbin/mysql 
ln -s /usr/local/mysql/bin/mysqladmin /sbin/mysqladmin  

设定mysql密码
mysqladmin -uroot password "123456"

 

3、添加用户和用户组

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 
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
 
basedir = /usr/local/mysql
datadir =/opt/data；

 

#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  

/usr/local/mysql/scripts/mysql_install_db --defaults-file=/data/mysql_data_3326/my.cnf --user=mysql --datadir=/data/mysql_data_3326/  --basedir=/usr/local/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

cd
cp ./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。

 
[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

 
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

#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

 
#进入端口为3306的数据库  
mysql -uroot -p -h127.0.0.1 -P3306  

mysql -uroot -p --protocol=tcp --port=3306 -h127.0.0.1

 
#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%'; 

 

帐号密码修改
use mysql
update user set password=password<"root"> where user='root';