MySQL启动脚本改装，支持多配置文件

 

相信很多童鞋都不止维护一个MySQL实例，MySQL自带的启动脚本不太好使，所以改装了一下，把指定的配置文件名传入即可

使用示例：

Usage: mysqld  {start|stop|restart|reload|force-reload|status} [ config name. "my.cnf" example "my" (default my) ]  [ MySQL server options ]

/etc/init.d/mysqld start my_3307
/etc/init.d/mysqld stop my_3307

 只要把mysql的配置文件名作为参数传入即可，配置文件名的后辍支持 .cnf和.cfg
修改MySQL的安装目录所在位置，如果安装在/usr/local/mysql的话，不用修改

mysqld文件第46行

basedir=
修改为：
basedir="你的MySQL根目录"

 在第48行加入默认配置文件

config_file='/etc/my.cnf'

 查找“mode=$1”
在下一行加入

server=$2

 在[ $# -ge 1 ] && shift的上一行加入，这个不能少了，否则会把传进来的第二个参数作为mysqld自身参数，会出错。

[ $# -ge 2 ] && shift && shift

 在任何位置加入下面的函数，注意：不要在函数内加。
该函数作用是查找mysql的配置文件位置，可以根据自己的需求加入

get_cnf_file() {
	cfg_name=$1
	if [ -n $cfg_name ];then
		cfg_file="/etc/$cfg_name.cnf"
		cfg_file2="/etc/$cfg_name.cfg"
		cfg_file3="$basedir/$cfg_name.cnf"
		cfg_file4="$basedir/$cfg_name.cfg"
		cfg_file5="$basedir/etc/$cfg_name.cnf"
		cfg_file6="$basedir/etc/$cfg_name.cfg"
		if [ -f $cfg_file ];then
			config_file=$cfg_file
		elif [ -f $cfg_file2 ];then
			config_file=$cfg_file2
		elif [ -f $cfg_file3 ];then
			config_file=$cfg_file3
		elif [ -f $cfg_file4 ];then
			config_file=$cfg_file4
		elif [ -f $cfg_file5 ];then
			config_file=$cfg_file5
		elif [ -f $cfg_file6 ];then
			config_file=$cfg_file6
		fi
	fi
}

 查找“parse_server_arguments"的函数调用，在之前加入

if [ -n $server ]
then
	get_cnf_file $server
	extra_args="-c $config_file"
	lock_file_path="$lockdir/$server"
fi

 最后，在 "start" 分支里修改

$bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
为：
if [ -n $server ];then
   $bindir/mysqld_safe --defaults-file="$config_file" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
else
   $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
fi

修改后 完整mysqld脚本代码 (红色的是被改过

#!/bin/sh
# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
# This file is public domain and comes with NO WARRANTY of any kind
####################
##  Modify by skyoo61@gmail.com
##  2012-03-26
####################
# MySQL daemon start/stop script.

# Usually this is put in /etc/init.d (at least on machines SYSV R4 based
# systems) and linked to /etc/rc3.d/S99mysql and /etc/rc0.d/K01mysql.
# When this is done the mysql server will be started when the machine is
# started and shut down when the systems goes down.

# Comments to support chkconfig on RedHat Linux
# chkconfig: 2345 64 36
# description: A very fast and reliable SQL database engine.

# Comments to support LSB init script conventions
### BEGIN INIT INFO
# Provides: mysql
# Required-Start: $local_fs $network $remote_fs
# Should-Start: ypbind nscd ldap ntpd xntpd
# Required-Stop: $local_fs $network $remote_fs
# Default-Start:  2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start and stop MySQL
# Description: MySQL is a very fast and reliable SQL database engine.
### END INIT INFO

# If you install MySQL on some other places than /usr/local/mysql, then you
# have to do one of the following things for this script to work:
#
# - Run this script from within the MySQL installation directory
# - Create a /etc/my.cnf file with the following information:
#   [mysqld]
#   basedir=<path-to-mysql-installation-directory>
# - Add the above to any other configuration file (for example ~/.my.ini)
#   and copy my_print_defaults to /usr/bin
# - Add the path to the mysql-installation-directory to the basedir variable
#   below.
#
# If you want to affect other MySQL variables, you should make your changes
# in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files.

# If you change base dir, you must also change datadir. These may get
# overwritten by settings in the MySQL configuration files.

basedir=
datadir=
config_file='/etc/my.cnf'

# Default value, in seconds, afterwhich the script should timeout waiting
# for server start. 
# Value here is overriden by value in my.cnf. 
# 0 means don't wait at all
# Negative numbers mean to wait indefinitely
service_startup_timeout=900

# Lock directory for RedHat / SuSE.
lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"

# The following variables are only set for letting mysql.server find things.

# Set some defaults
mysqld_pid_file_path=
if test -z "$basedir"
then
  basedir=/usr/local/mysql
  bindir=/usr/local/mysql/bin
if test -z "$datadir"
  then
    datadir=/data/mysql
  fi
  sbindir=/usr/local/mysql/bin
  libexecdir=/usr/local/mysql/bin
else
  bindir="$basedir/bin"
if test -z "$datadir"
  then
    datadir="$basedir/data"
  fi
  sbindir="$basedir/sbin"
  libexecdir="$basedir/libexec"
fi

# datadir_set is used to determine if datadir was set (and so should be
# *not* set inside of the --basedir= handler.)
datadir_set=

#
# Use LSB init script functions for printing messages, if possible
#
lsb_functions="/lib/lsb/init-functions"
if test -f $lsb_functions ; then
  . $lsb_functions
else
  log_success_msg()
  {
    echo " SUCCESS! $@"
  }
  log_failure_msg()
  {
    echo " ERROR! $@"
  }
fi

PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"
export PATH

mode=$1    # start or stop
server=$2    # default my, config file name not suffix, default suffix ".cnf"

[ $# -ge 2 ] && shift && shift
[ $# -ge 1 ] && shift


other_args="$*"   # uncommon, but needed when called from an RPM upgrade action
           # Expected: "--skip-networking --skip-grant-tables"
           # They are not checked here, intentionally, as it is the resposibility
           # of the "spec" file author to give correct arguments only.

case `echo "testing\c"`,`echo -n testing` in
    *c*,-n*) echo_n=   echo_c=     ;;
    *c*,*)   echo_n=-n echo_c=     ;;
    *)       echo_n=   echo_c='\c' ;;
esac

parse_server_arguments() {
for arg do
case "$arg" in
      --basedir=*)  basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`
                    bindir="$basedir/bin"
if test -z "$datadir_set"; then
              datadir="$basedir/data"
            fi
            sbindir="$basedir/sbin"
            libexecdir="$basedir/libexec"
        ;;
      --datadir=*)  datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`
            datadir_set=1
    ;;
      --pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --port=*) port=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --log-error=*) log_error_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --server-id=*) server_id=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --socket=*) socket=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
    esac
  done
}

wait_for_pid () {
  verb="$1"           # created | removed
  p
      exit 1
    ;;
esac

exit 0