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20道shell第7题

　
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企业实战题7：
开发mysql多实例启动脚本：
已知mysql多实例启动命令为：mysqld_safe–defaults-file=/data/3306/my.cnf &
停止命令为：mysqladmin -u root -poldboy123 -S /data/3306/mysql.sockshutdown
请完成mysql多实例启动启动脚本的编写
要求：用函数，case语句、if语句等实现。

 

答案：

[root@clc-server ~]# cat shell7.sh 
#!/bin/bash
######################
#this scripts is created by clc 
#######################
# chkconfig: 2345 69 39
# description:manager multiplemysqld server.
. /etc/init.d/functions
port=3306
mysql_user=root
mysql_pwd="oldboy123"
cmd_path="/application/mysql/bin"
mysql_sock="/data/$port/mysql.sock"

function mysql_start(){
if [ ! -e $mysql_sock ]
 then
 $cmd_path/mysqld_safe --defaults-file=/data/${port}/my.cnf &>/dev/null &
 val=$?
 if [ $val -eq 0 ]
 then
 action "Start MySQL..." /bin/true
 else
 action "Start MySQL..." /bin/false
 fi
 else
 echo "MySQL is started ...."
 exit 2
fi

} 

function mysql_stop(){
if [ ! -e $mysql_sock ]
 then
 echo "MySQL is stopped..."
 exit 2
 else
 $cmd_path/mysqladmin -u${mysql_user} -p${mysql_pwd} -S $mysql_sock shutdown
 if [ $? -eq 0 ]
 then 
 action "Stop MySQL..." /bin/true
 else
 action "Stop MySQL..." /bin/false
 fi
fi
}

function mysql_status(){
if [ ! -e $mysql_sock ]
 then
 echo "MySQL is not running!!!"
 else
 echo "MySQL is running!!!"
fi
}

case $1 in
start)
mysql_start
;;
stop)
mysql_stop
;;
status)
mysql_status
;;
restart)
mysql_stop
sleep 2
mysql_start
;;
*)
printf "Usage: /data/${port}/mysql {start|stop|restart|status}\n"
esac


[root@clc-server ~]#

 

别人的答案：

[root@shell scripts]# vi mysqld1.sh
#!/bin/bash
# chkconfig: 2345 65 37
# description: manager multiplemysqld server.
 
# Warning: This script uses the/etc/init.d/functions system function.
#          System  kernel version isCentOS6.6,2.6.32-504.el6.x86_64.
#          I'm not sure whether other systemscan be used normally.
# Source function library.
. /etc/init.d/functions
 
 
Port=$2
datadir=/data/$2
Path="/application/mysql"
CmdPath="$Path/bin"
MysqlCmd="$CmdPath/mysqld_safe"
prog=mysqld
Port=$2
datadir=/data/$2
pidfile=${PIDFILE-$datadir/mysqld.pid}
lockfile=${LOCKFILE-/var/lock/subsys/mysqld$Port}
MysqlConf="$datadir/my.cnf"
RETVAL=0
 
Usage1(){
        echo -e "\033[33m USAGE: $0 {startport|stop port|status port|restart port} \033[0m"
        exit 6
}
 
Usage2(){
        echo -e "\033[33m MySQL DaemonProgram Need Configuration File,like $datadir/my.cnf \033[0m"
        exit 6
}
 
[ -n "$Port" -a  -z "`echo"${Port//[0-9]/}"`" ] || Usage1
 
start(){
        [ -x $MysqlCmd ] || exit 5
        [ -f $MysqlConf ] || Usage2
        echo -n $"Starting $prog: "
        daemon --pidfile=${pidfile}"$MysqlCmd --defaults-file=$MysqlConf &>/dev/null &"
        sleep 1
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && touch${lockfile}
        return $RETVAL
}
 
stop(){
        echo -n $"Stopping $prog: "
        killproc -p $pidfile
        retval=$?
        echo
        [ $retval -eq 0 ] && rm -f${lockfile}
        return $retval
}
 
restart() {
        stop
        sleep 1
        start
}
 
rh_status() {
        status -p $pidfile
}
 
rh_status_q() {
        rh_status >/dev/null 2>&1
}
 
case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    status)
        rh_status
        ;;
    *)
        Usage1
        exit 2
esac

 

 

原文链接：20道shell第7题，转载请注明来源！

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