今天应朋友要求做个mysqld_multi 配置MySQL多实例 ,这东西我也没有接触过,所以在百度搜到了一博客文章,对着上面做了下实验,成功完成。
博客出处:http://chenzehe.iteye.com/blog/1266260
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
- 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
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
4、初始化数据目录:
- #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
- 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。
- [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
- 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
- #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%';