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." admin@yourdomain.com < /var/log/mysqlerr  
            else  
                echo "mysql is running..."  
            fi  
        else  
            mail -s "WARN!Server: $MYSQLIP mysql is down." admin@yourdomain.com  
        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." admin@126.com  
    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。