MySQL多執行個體配置

MySQL多執行個體配置

實驗環境：RHEL6.4為迷你安裝，mysql安裝包為通用二進位安裝包，版本為mysql-5.6.26

1.建立mysql使用者

#useradd –M –s /sbin/nologin mysql

#yum –y install ncurses-devel libaio-devel

#安裝mysql的依賴包，否則下面無法初始化成功

2.軟體包解壓縮

# tar xf mysql-5.6.26-linux-glibc2.5-x86_64.tar.gz -C /usr/local

# mv /usr/local/mysql-5.6.26-linux-glibc2.5-x86_64/ /usr/local/mysql

3.建立目錄

# mkdir /data/{3306,3307}/data –pv

# mkdir /data/{3306,3307}/log –pv

# tree /data/ #查看分類樹

4. /data/3306中建立my.cnf

# cd /data/3306/

# vim my.cnf

[client]

port = 3306

socket = /data/3306/mysql.sock

[mysqld]

port=3306

socket = /data/3306/mysql.sock

pid-file = /data/3306/data/mysql.pid

basedir = /usr/local/mysql

datadir = /data/3306/data

server-id=1

#log-bin=mysql-bin

#log-bin-index= mysql-bin.index

# LOGGING

log_error=/data/3306/log/mysql-error.log

slow_query_log_file=/data/3306/log/mysql-slow.log

slow_query_log=1

5. /data/3307中建立my.cnf

# cd ../3307/

# vim my.cnf

[client]

port = 3307

socket = /data/3307/mysql.sock

[mysqld]

port=3307

socket = /data/3307/mysql.sock

pid-file = /data/3307/data/mysql.pid

basedir = /usr/local/mysql

datadir = /data/3307/data

server-id=2

#log-bin=mysql-bin

#log-bin-index= mysql-bin.index

# LOGGING

log_error=/data/3307/log/mysql-error.log

slow_query_log_file=/data/3307/log/mysql-slow.log

slow_query_log=1

 6. 在/data/3306中建立mysql開機檔案

# cd /data/3306/

# vim mysql

#!/bin/sh

[ -f /etc/init.d/functions ] && . /etc/init.d/functions

port=3306

mysql_user="root"

mysql_pwd=""

mysql_sock="/data/${port}/mysql.sock"

CmdPath="/usr/local/mysql/bin"

#startup function

usage(){

printf "Usage: /data/${port}/mysql {start|stop|restart}\n"

}

function_start_mysql()

{

if [ ! -e "$mysql_sock" ];then

/bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &

action "Starting MySQL..." /bin/true

else

printf "MySQL is running...\n"

exit

fi

}

#stop function

function_stop_mysql()

{

if [ ! -e "$mysql_sock" ];then

printf "MySQL is stopped...\n"

exit

else

action "Stoping MySQL..." /bin/true

${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown

fi

}

#restart function

function_restart_mysql()

{

function_stop_mysql &>/dev/null

sleep 2

function_start_mysql &>/dev/null

action "Restarting MySQL..." /bin/true

}

if [ $# -ne 1 ];then

usage

fi

case $1 in

start)

function_start_mysql

;;

stop)

function_stop_mysql

;;

restart)

function_restart_mysql

;;

*)

usage

esac

#chmod +x mysql

7、在/data/3307中建立mysql開機檔案

# cd /data/3307/

 # vim mysql

#!/bin/bash

[ -f /etc/init.d/functions ] && . /etc/init.d/functions

port=3307

mysql_user="root"

mysql_pwd=""

mysql_sock="/data/${port}/mysql.sock"

CmdPath="/usr/local/mysql/bin"

usage(){

printf "Usage: /data/${port}/mysql {start|stop|restart}\n"

}

#startup function

function_start_mysql()

{

if [ ! -e "$mysql_sock" ];then

/bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &

action "Starting MySQL..." /bin/true

else

printf "MySQL is running...\n"

exit

fi

}

#stop function

function_stop_mysql()

{

if [ ! -e "$mysql_sock" ];then

printf "MySQL is stopped...\n"

exit

else

action "Stoping MySQL..." /bin/true

${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown

fi

}

#restart function

function_restart_mysql()

{

function_stop_mysql &>/dev/null

sleep 2

function_start_mysql &>/dev/null

action "Restarting MySQL..." /bin/true

}

case $1 in

start)

function_start_mysql

;;

stop)

function_stop_mysql

;;

restart)

function_restart_mysql

;;

*)

usage

esac

#chmod +x mysql

8. 修改檔案擁有者和許可權

#chown -R mysql:mysql /data

9. 添加mysql啟動路徑 

 #echo 'export PATH=$PATH:/usr/local/mysql/bin' >>/etc/profile
  #source /etc/profile

10. 初始化資料庫 

 # cd /usr/local/mysql/scripts/

 #./mysql_install_db --defaults-file=/data/3306/my.cnf --user=mysql --basedir=/usr/local/mysql --datadir=/data/3306/data

 #./mysql_install_db --defaults-file=/data/3307/my.cnf --user=mysql --basedir=/usr/local/mysql --datadir=/data/3307/data

11. 啟動mysql

 #/data/3306/mysql start
#/data/3307/mysql start
#netstat -lntp | grep 330    #查看是否啟動進程

12. 登陸mysql

①# mysql -S /data/3306/mysql.sock #剛安裝完的mysql是沒有登陸密碼的

#如果不成功，檢查/data/3306/log目錄下的mysql-error.log日誌，逐一排除錯誤

如果登陸成功，下面就修改登入密碼

mysql> update mysql.user set password=password("123456") where user='root';
mysql> flush privileges;

不建議在shell環境下修改密碼，否則別人只要查看命令曆史就能看到密碼。當然你也可以是shell下進行，但是記得要清楚曆史命令記錄。

②同理，使用上面的方法修改3307的登陸密碼
# mysql -S /data/3307/mysql.sock

 mysql> update mysql.user set password=password("123456") where user='root';
mysql> flush privileges;

③要把上面更改後的密碼回寫到mysql的開機檔案中（否則每次啟動、關閉、重啟mysql都要輸入密碼）

# sed -i 's/mysql_pwd=\"\"/mysql_pwd=\"123456\"/g' /data/3306/mysql
#sed -i 's/mysql_pwd=\"\"/mysql_pwd=\"123456\"/g' /data/3307/mysql

也可以手動進行修改

#vim /data/3306/mysql

# vim /data/3307/mysql

13. 重啟mysql

#/data/3306/mysql restart

#/data/3307/mysql restart

#netstat -lntp | grep 330

14.知識點

進入mysql時，要記得加-S 指定mysql通訊端的路徑

# mysql –u root –p -S /data/3307/mysql.sock

下面的命令可以平滑關閉mysql

# mysqladmin -uroot -p123456 -S /data/3306/mysql.sock shutdown

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