MySQL系列之一键安装脚本----单实例/多实例

      最近在搞MySQL，由于经常测试一些东西。因此，就写了一个一键安装脚本。

脚本用途：

用于在CentOS/RHEL 6.x系统上快速部署出Mysql的单实例或者多实例环境

脚本说明：

该脚本运行情况良好

针对脚本中，每一步命令执行的正误判断以及提醒非常醒目，可协助执行者快速定位错误源

脚本诸多内容都以声明变量，增加了脚本的灵活性和扩展性

脚本以做模块化处理，对应功能对应函数，方便SA快速更改和了解该脚本

该脚本使用注意事项：

1、能够通公网或者mysql源码包已经放置到/usr/local/src目录下

2、本脚本运行环境要求yum源已经配好

3、注意使用的mysql版本，为了稳定期间，本脚本暂稳定支持5.5以后的mysql源码包。本脚本默认使用5.6.16版本的源码包。如果你需要使用其它版本，请更改MYSQL_SOFT变量以及源码包的下载路径

4、mysql安装默认位置为/usr/local/mysql，如需更改请自行修改INSTALL_PATH变量

5、由于我基本每条命令都有做注释，因此其它一些参数的修改，请自己研究，此处不再啰嗦

6、系统环境要求CentOS/RHEL 6.x版本

以下为脚本内容：

#!/bin/bash

#

# The script used in CentOS/RHEL 6. X system automatically deploy mysql single instance and multiple instances of the environment

# Written by sunsky

# Mail : nolinux@126.com

# QQ   : 274546888

# Date : 2014-7-19 14:23:00

#

. /etc/init.d/functions

tac () {

if [ $? == 0 ];then

action '' /bin/true

else

action '' /bin/false

fi

}

pre_instance () {

echo '  -- Add MySQL User<1>'

useradd -r -u 306 mysql;tac

echo '  -- Install Some Packages<1>'

yum install wget make cmake gcc gcc-c++ ncurses ncurses-devel perl -y &> /dev/null;tac

echo '  -- Downloading MySQL<2>' 

cd /usr/local/src;tac

#wget http://cdn.mysql.com/Downloads/MySQL-5.6/${MYSQL_SOFT}.tar.gz;tac

echo '  -- Unpack the source code package<2>'

tar -zxf /usr/local/src/${MYSQL_SOFT}.tar.gz -C /usr/local/src/;tac

cd /usr/local/src/${MYSQL_SOFT};tac

echo '  -- Install MySQL<3>'

cmake -DCMAKE_INSTALL_PREFIX=$INSTALL_PATH -DINSTALL_DATADIR=$DATA_DIR -DDEFAULT_CHARSET=utf8 -DWITH_EXTRA_CHARSETS=all -DMYSQL_USER=mysql -DDEFAULT_COLLATION=utf8_general_ci &> /dev/null;tac

make &>/dev/null;tac

make install &> /dev/null;tac

echo '  -- Change the directory owner and group<1>'

chown -R mysql.mysql /usr/local/mysql;tac

echo '  -- Create my.cnf<1>'

echo |cp /usr/local/src/${MYSQL_SOFT}/support-files/my-default.cnf /etc/my.cnf ;tac

echo '  -- Create Mysqld Scripts<2>'

echo |cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld;tac

chmod +x /etc/init.d/mysqld;tac

#echo '  -- Start Mysqld Service Test<1>'

#sleep 3

#/etc/init.d/mysqld start > /dev/null;tac

#echo '  -- View MySQL Database Status<1>'

#/etc/init.d/mysqld status | grep "SUCCESS" > /dev/null;tac

#if [ $? == 0 ];then action '  -- MySQL Install Done!' /bin/true;else action '  -- MySQL Install Failed!' false;fi

#action '  -- MySQL Command Global Path<2>'

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

#sleep 1

#source /etc/profile;tac

}

single_instance () {

echo '   -- Initialized MySQL database, the default port 3306<1>'

$INIT_DB --datadir=$DATA_DIR &> /dev/null;tac 

echo '   -- Start Mysqld Service Test<1>'

/etc/init.d/mysqld start > /dev/null;tac

echo '   -- View MySQL Database Status<1>'

/etc/init.d/mysqld status | grep "SUCCESS" > /dev/null;tac

if [ $? == 0 ];then action '   -- MySQL Install Done!' /bin/true;else action '   -- MySQL Install Failed!' false;fi

action '   -- MySQL Command Global Path<2>'

echo 'export PATH=/usr/local/mysql/bin/:$PATH' >> /etc/profile;tac

sleep 1

source /etc/profile;tac

}

single_of_multiple () {

action '    -- Add Mysqld_Multi User<2>'

user="mysql";tac

password="sunsky";tac

action '    -- Stop MySQL Database<1>'

/etc/init.d/mysqld stop &> /dev/null;tac

action "    -- Mysqld_multi Configure<2>"

sed -i 's/^[^#]/#/g' /etc/my.cnf;tac

cat > /etc/my.cnf << EOF

[mysqld_multi] 

mysqld = /usr/local/mysql/bin/mysqld_safe

mysqladmin = /usr/local/mysql/bin/mysqladmin

user = $user 

password = $password 

[mysqld3306]

server-id = 1

port = 3306

socket = /tmp/mysql3306.sock

pid-file = /tmp/mysql3306.pid

basedir = /usr/local/mysql

datadir = /usr/local/mysql/data

key_buffer_size = 16k

max_allowed_packet = 1M

table_open_cache = 4

sort_buffer_size = 64K

read_buffer_size = 256K

read_rnd_buffer_size = 256K

net_buffer_length = 2K

thread_stack = 128K

EOF

tac

echo '    -- prepare my_default_print<1>'

echo | cp /usr/local/mysql/bin/my_print_defaults /usr/bin/;tac

sleep 1

action "    -- Initialize multiple instance of the 3306 instance<1>"

echo '    -- Start multiple instances of the 3306 instance<1>'

$MULTI_DB 3306;tac

sleep 5

action "    -- Examples of 3306 authorized users<1>"

$MYSQL_DB -S /tmp/mysql3306.sock -e "grant shutdown on *.* to '$user'@'%' identified by '$password';";tac

action "    -- Instance 3306 has user and password to shutdown<1>"

}

multiple_instances () {

user="mysql"

password="sunsky"

for port in $*;do

 netstat -lntp | grep $port &> /dev/null

 if [ $? -eq 0 ];then

  action "    -- Instance $port is running<1>" 

 else

  cat /etc/my.cnf | grep mysqld${port} > /dev/null

  if [ $? -eq 0 ];then

   echo "    -- $port instance is already exists,please input other port number!"

   $MULTI_DB $port && action "   -- Instance $port open to complete" /bin/true || action "   -- Instance $port open failed" /bin/false

  else

cat >> /etc/my.cnf << EOF

[mysqld${port}]

server-id = $[${port}%3305]

port = ${port}

socket = /tmp/mysql${port}.sock

pid-file = /tmp/mysql${port}.pid

basedir = /usr/local/mysql

datadir = /usr/local/mysql/data${port}

key_buffer_size = 16k

max_allowed_packet = 1M

table_open_cache = 4

sort_buffer_size = 64K

read_buffer_size = 256K

read_rnd_buffer_size = 256K

net_buffer_length = 2K

thread_stack = 128K

EOF

echo "    -- Create $port Instance Datadir<2>"

  mkdir -p ${DATA_DIR}${port};tac

  chown -R mysql.mysql ${DATA_DIR}${port};tac

echo "    -- Initialize multiple instance of the $port instance<1>"

  $INIT_DB --datadir=${DATA_DIR}${port} &> /dev/null ;tac 

echo "    -- Start multiple instances of the $port instance<1>"

  $MULTI_DB $port && action "    -- Instance $port open to complete" || action "    -- Instance $port open failed";tac

echo "    -- Examples of $port authorized users"

  sleep 3

  $MYSQL_DB -S /tmp/mysql${port}.sock -e "grant shutdown on *.* to '$user'@'localhost' identified by '$password';"&& action "    -- Instance $port has user and password to shutdown" /bin/true|| action "    -- Instance $port has user and password to shutdown" /bin/false

 fi

fi

done

}

# MySQL Install Path 

INSTALL_PATH='/usr/local/mysql'

# MySQL DATA_DR

DATA_DIR="$INSTALL_PATH/data"

# MySQL Command Path

INSTALL_DB="$INSTALL_PATH/scripts/mysql_install_db"

MYSQL_DB="$INSTALL_PATH/bin/mysql"

MYSQL_MULTI="$INSTALL_PATH/bin/mysqld_multi"

INIT_DB="$INSTALL_DB --user=mysql --basedir=$INSTALL_PATH --defaults-file=/etc/my.cnf"

MULTI_DB="$MYSQL_MULTI --defaults-file=/etc/my.cnf start"

MYSQL_SOFT='mysql-5.6.16'

case $# in

0)

cat << EOF

The system administrator, hello!

This is a key to install mysql single instance and multiple instances of the script

You can use the name in the script with the upper slogans, to define several instances installed!

Example:

[root@sunsky ~]# bash auto_install_mysql_instance.Sh 3306 3307

Install two mysql instance, port Numbers 3306 and 3307 respectively.

If you are familiar with shell, are free to change the script!If you are not familiar with, please do not change!

EOF

;;

1)

echo '> Now begin to single instance database initialization'

echo '>> STEP ONE : Prepare the MySQL Environment'

pre_instance

echo '>>> STEP TWO : Install the MySQL single instance'

single_instance

echo '>>>> SETP THREE : MySQL single instance installation is complete!';;

*)

echo '> Now start multi-instance database initialization'

echo '>> STEP ONE : Prepare the MySQL Environment'

pre_instance

single_instance

echo '>>> STEP TWO : Install the MySQL single of multiple instance'

single_of_multiple

echo '>>>> STEP THREE : Install the MySQL others of multiple instance'

multiple_instances $*

echo '>>>>> SETP FOUR : MySQL multiple instance installation is complete'

;;

esac

以上就是脚本的内容，该脚本主体为5个函数組，分别是tac、pre_instance、single_instance、single_of_multiple和multiple_instances。

tac负责做脚本中命令执行的正误判断，方便定位错误源

pre_instance负责准备mysql安装的环境，比如用户创建、相关工具安装、mysql源码包准备、mysql软件安装等

single_instance负责初始化单实例数据库

single_of_multiple负责多实例环境下，对纯单实例的实例做修改

multiple_instances负责创建多实例环境

脚本中间声明了若干变量，这里不做介绍!

下面一个case语句用来调度执行我们整个脚本。如果你直接执行脚本，什么都不跟的话，默认会显示出帮助信息。

帮助信息如下：

wKiom1PKr7-yQ5yJAAI_JZ0lIVg872.jpg

下面我列举，正常安装单实例

wKioL1PKsHvgOi10AAKHaviAtBk955.jpg

正常多实例安装

wKiom1PKr3njKWdLAAH4PxM6vzg755.jpg

wKioL1PKsJXw6IlxAAKH2LRmaWo672.jpg

希望该脚本能对大家有所帮助！

如果发现脚本里面有什么欠妥当的地方，请及时告知我！谢谢！

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