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目的:
1.监控mysql服务器的状态
2.当发现mysql down机就自动重启mysql服务
3.重启mysql不成功,发邮件给管理员警告mysql down机
#vi /usr/local/sbin/check_mysql.sh
#!/bin/sh cat << EOF +--------------------------------------------------------------------------+ | === Welcome to LinuxTone=== | |-------------------------http://www.linuxtone.org------------------------ | +--------------------------------------------------------------------------+ EOF PORT=`netstat -na|grep "LISTEN"|grep "3306"|awk -F[:" "]+ '{print $5}'` MYSQLIP=`ifconfig eth0|awk '/inet/{print $2}'|cut -c 6-` while [ `whoami` == "root" ] do if [ "$PORT" == "3306" ];then echo "mysql is running......" else echo "restart mysql" /etc/init.d/mysqld restart if [ "$PORT" == "3306" ];then echo "mysql restart successful......" else echo "mysql restart failure......" echo "server: $MYSQLIP mysql is down,please try to restart mysql!" > /var/log/mymsg mail -s "warn!server: $MYSQLIP mysql is down" hamgua\@gmail.com < /var/log/mymsg fi fi break done
赋予check_mysql.sh可执行的权限
#chmod u+x /usr/local/sbin/check_mysql.sh
加入crontab,让系统五分钟检测一次mysql状态
#crontab -l
*/5 * * * * /usr/local/sbin/check_mysql.sh > /dev/null 2>&1
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