主从同步，监控从库运行状态脚本

注意：本文出自 “阿飞”的博客 ，如果要转载本文章，请与作者联系！

并注明来源:http://blog.csdn.net/faye0412/article/details/7884301

再贡献一份监控MYSQL主从同步配置中监控从库运行状态的脚本。

代码如下：

#!/bin/bash 
#Check MySQL Slave's Runnning Status
#Crontab time 00:10

MYSQLPORT=`netstat -na|grep "LISTEN"|grep "3306"|awk -F[:" "]+ '{print $5}'`
MYSQLIP=`ifconfig eth0|grep "inet addr" | awk -F[:" "]+ '{print $4}'`
STATUS=$(/usr/bin/mysql -uroot -p11111 -S /var/lib/mysql/mysql.sock -e "show slave status\G" | grep -i "running")
IO_env=`echo $STATUS | grep IO | awk  ' {print $2}'`
SQL_env=`echo $STATUS | grep SQL | awk  '{print $2}'`
DATA=`date +"%y-%m-%d %H:%M:%S"`

function checkMysqlStatus(){
	if [ "$MYSQLPORT" == "3306" ]
	then
		/usr/bin/mysql -uroot -p11111 --connect_timeout=5 -e "show databases;" &>/dev/null 2>&1
		if [ $? -ne 0 ]
		then
			echo "Server: $MYSQLIP mysql is down, please try to restart mysql by manual!" > /var/log/mysqlerr
			mail -s "WARN! server: $MYSQLIP  mysql is down." [email protected] < /var/log/mysqlerr
		else
			echo "mysql is running..."
		fi
	else
		mail -s "WARN!Server: $MYSQLIP mysql is down." [email protected]
	fi
}
 
checkMysqlStatus

if [ "$IO_env" = "Yes" -a "$SQL_env" = "Yes" ]
then
  echo "MySQL Slave is running!"
else
  echo "####### $DATA #########">> /data/mysql/mysql_slave_status.log
  echo "MySQL Slave is not running!" >>    /data/mysql/mysql_slave_status.log
  echo "MySQL Slave is not running!" | mail -s "WARN! $MYSQLIP MySQL Slave is not running." [email protected]
fi

建议每十分钟运行一次
*/10 * * * * root /bin/sh /root/mysql_slave_status.sh

原理：

1）监控MYSQL的运行状态；
2）Slave机器的IO和SQL状态都必须为YES，缺一不可；

注意，请结合自身的实际环境使用。

本文脚本参考自抚琴煮酒（http://andrewyu.blog.51cto.com）的脚本修改实现，在这里非常感谢抚琴煮酒的分享。