Centos6.3下单系统多mysql实例配置

   最近因为单位项目扩充,需要在原线上数据库服务器上加装一个mysql实例(实际上就是从新编译安装一个非3306的自定义端口,不同目录的mysql),研究了一天,终于顺利搞定,这里把配置步骤发给大家,供大家学习使用.

注:本文档做了两个MYSQL实例,多个实例方法以此类推

LINUX操作系统:centOS6.3 64bit(安装了系统默认开发包)

实例一:

MYSQL版本:mysql-5.0.56

PORT:3306

系统目录:/usr/local/mysql3306

实例二:

MYSQL版本:mysql-5.1.72

PORT:3307

系统目录:/usr/local/mysql3307

一.安装开发包(使用默认CENTOS更新源):

# yum -y install wget gcc-c++ ncurses ncurses-devel cmake make perl bison openssl openssl-devel gcc* libxml2 libxml2-devel curl-devel libjpeg* libpng* freetype*

二.关闭iptables和SELINUX

# service iptables stop

# setenforce 0

# vi /etc/sysconfig/selinux

---------------

SELINUX=disabled

---------------

三.安装mysql数据库实例

1.下载编译包：

# su -

# mkdir ~/src

# cd src

# wget http://mysql.cdpa.nsysu.edu.tw/Downloads/MySQL-5.1/mysql-5.1.73.tar.gz

# wget http://down1.chinaunix.net/distfiles/mysql-5.0.56.tar.gz

2.安装前的初始配置工作：

1).创建一个Mysql用户

# useradd mysql  

2).新建mysql下data和log子目录

# mkdir /usr/local/mysql{3306,3307}/data          

# mkdir /usr/local/mysql{3306,3307}/log

3).修改目录的所属者以及所属组权限          

# chown -R mysql:mysql /usr/local/mysql{3306,3307}/data/

# chown -R mysql:mysql /usr/local/mysql{3306,3307}/log/

# chmod 750 /usr/local/mysql{3306,3307}/data      

# chmod 750 /usr/local/mysql{3306,3307}/log  

4).创建mysql相关目录并配置权限

# mkdir -p /usr/local/mysql{3306,3307}/etc

# chown -R mysql.mysql /usr/local/mysql{3306,3307}/etc

# mkdir -p /var/run/mysqld{3306,3307}

# chown -R mysql.mysql /var/run/mysqld{3306,3307}

# mkdir -p /var/lib/mysqld{3306,3307}

# chown -R mysql.mysql /var/lib/mysqld{3306,3307}

# cp /etc/my.cnf /usr/local/mysql{3306,3307}/etc

3.解包编译安装

编译实例一:

# cd ~/src

# tar -zxvf mysql-5.0.56.tar.gz    

# cd mysql-5.0.56  

./configure --prefix=/usr/local/mysql3306 --with-mysqld-user=mysql --sysconfdir=/usr/local/mysql3306/etc  --localstatedir=/usr/local/mysql3306/data --with-tcp-port=3306 -enable-assembler --with-mysqld-ldflags=-all-static --with-charset=utf8 --with-extra-charsets=gbk -with-extra-charsets=all --with-plugins=csv,innobase,myisam,heap --with-unix-socket-path=/tmp/mysql3306.sock

# make

# make install

编译实例二:

# cd ~/src

# tar -zxvf mysql-5.1.71.tar.gz    

# cd mysql-5.1.71

./configure --prefix=/usr/local/mysql3307 --with-mysqld-user=mysql --sysconfdir=/usr/local/mysql3307/etc  --localstatedir=/usr/local/mysql3307/data --with-tcp-port=3307 -enable-assembler --with-mysqld-ldflags=-all-static --with-charset=utf8 --with-extra-charsets=gbk -with-extra-charsets=all --with-plugins=csv,innobase,myisam,heap --with-unix-socket-path=/tmp/mysql3307.sock

# make

# make install

4.编写mysql配置项：

实例一:

# vi /usr/local/mysql3306/etc/my.cnf

-------------------------------------------------------

[mysqld]

datadir=/usr/local/mysql3306/data

socket=/tmp/mysql3306.sock

user=mysql

port=3306

pid-file=/var/lib/mysqld3306/mysql.pid

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

max_connections= 16384

skip-name-resolve

skip-locking

key_buffer = 256M

max_allowed_packet = 32M

table_cache = 3072

thread_cache_size = 256

sort_buffer_size = 16M

read_buffer_size = 4M

read_rnd_buffer_size = 16M

net_buffer_length = 256M

thread_stack = 8M

query_cache_size = 128M

query_cache_limit = 2M

wait_timeout=7200

interactive_timeout=7200

#log

log-error=/usr/local/mysql3306/log/error.log

log=/usr/local/mysql3306/log/mysql.log

long_query_time=2

log-slow-queries= /usr/local/mysql3306/log/slowquery.log

log-bin= /usr/local/mysql3306/log/bin.log

expire_logs_days = 15

sync_binlog = 1

max_binlog_cache_size = 4294967295

local-infile=0

[mysqld_safe]

log-error=/var/log/mysqld3306.log

pid-file=/var/run/mysqld3306/mysqld.pid

-------------------------------------------------------

实例二:

# vi /usr/local/mysql3307/etc/my.cnf

-------------------------------------------------------

[mysqld]

datadir=/usr/local/mysql3307/data

socket=/tmp/mysql3307.sock

user=mysql

port=3307

pid-file=/var/lib/mysqld3307/mysql.pid

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

max_connections= 16384

skip-name-resolve

skip-locking

key_buffer = 256M

max_allowed_packet = 32M

table_cache = 3072

thread_cache_size = 256

sort_buffer_size = 16M

read_buffer_size = 4M

read_rnd_buffer_size = 16M

net_buffer_length = 256M

thread_stack = 8M

query_cache_size = 128M

query_cache_limit = 2M

wait_timeout=7200

interactive_timeout=7200

#log

log-error=/usr/local/mysql3307/log/error.log

log=/usr/local/mysql3307/log/mysql.log

long_query_time=2

log-slow-queries= /usr/local/mysql3307/log/slowquery.log

log-bin= /usr/local/mysql3307/log/bin.log

expire_logs_days = 15

sync_binlog = 1

max_binlog_cache_size = 4294967295

local-infile=0

[mysqld_safe]

log-error=/var/log/mysqld3307.log

pid-file=/var/run/mysqld3307/mysqld.pid

-------------------------------------------------------

5.将mysql的库文件路径加入系统的库文件搜索路径中

方法一：直接做软链接

# ln -s /usr/local/mysql3306/lib/mysql /usr/lib/mysql

方法二：利用ldconfig导入系统库

# echo "/usr/local/mysql3306/lib" >> /etc/ld.so.conf.d/mysql.conf

# ldconfig

6.输出mysql的头文件到系统头文件

# ln -s /usr/local/mysql3306/include/mysql /usr/include/mysql

注: 此处只需将一个mysql实例的库文件添加到系统库,无需多次添加

7.进入相应实例的安装路径,初始化各自配置脚本

实例一:

# cd /usr/local/mysql3306

# scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql3306/data

实例二:

# cd /usr/local/mysql3307

# scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql3307/data

8.复制mysql启动脚本到系统服务目录,并更改脚本配置

# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld3306

# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld3307

实例一:

# vi /etc/init.d/mysqld3006

搜索如下行,红色标注的为添加的参数:

---------------------------------------------

basedir=/usr/local/mysql3306

datadir=/usr/local/mysql3306/data

conf=/usr/local/mysql3306/etc/my.cnf

$bindir/mysqld_safe --defaults-file=$conf --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

--------------------------------------------

实例二:

# vi /etc/init.d/mysqld3007

搜索如下行,红色标注的为添加的参数:

---------------------------------------------

basedir=/usr/local/mysql3307

datadir=/usr/local/mysql3307/data

conf=/usr/local/mysql3307/etc/my.cnf

$bindir/mysqld_safe --defaults-file=$conf --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

--------------------------------------------

9.系统启动项相关配置

实例一:

# chkconfig --add mysqld3306  #添加开机启动服务

# chkconfig --level 35 mysqld3306 on  #设置mysql启动

实例二:

# chkconfig --add mysqld3307  

# chkconfig --level 35 mysqld3307 on

10.启动mysql

实例一:

# service mysqld3306 start  

实例二:

# service mysqld3307 start  

11 添加mysql命令集到系统全局变量

注:如果系统之前未安装mysql客户端,可以将编译好的mysql命令集导入系统全局变量

以后就可以直接使用mysql命令集,而不需要使用绝对路径访问.

# echo "PATH=$PATH:/usr/local/mysql3306/bin;export PATH" >> /etc/profile

# source /etc/profile

12. 设置初始账户,并登陆后台:

实例一:

# /usr/local/mysql3306/bin/mysqladmin -u root password 123456   #设置超级管理员密码

# /usr/local/mysql3306/bin/mysql -P3306 -S/tmp/mysql3306.sock -uroot -p123456 #连接数据库

实例二:

# /usr/local/mysql3307/bin/mysqladmin -u root password 123456   #设置超级管理员密码

# /usr/local/mysql3307/bin/mysql -P3307 -S/tmp/mysql3307.sock -uroot -p123456 #连接数据库

注: 因为加了mysql环境变量,以后系统后台可以直接使用mysql命令登录,这里使用绝对路径是为了规范操作

# mysql -P3307 -S/tmp/mysql3307.sock -uroot -p123456

13.端口测试:

大功告成.....O(∩_∩)O~