mysql script to implement automatic monitoring and synchronization

MySQL越来越被更多企业接受，随着企业发展，MySQL存储数据日益膨胀，MySQL的性能分析、监控预警、容量扩展议题越来越多。“工欲善其 事，必先利其器”，那么我们如何在进行MySQL性能分析、监控预警、容量扩展问题上得到更好的解决方案，就要利用各种工具来对MySQL各种指标进行分析。本篇内容我们就讲解自动监控从MySQL同步的脚本。

脚本设计思路：

1、此脚本应该能适应各种各样不同的内外网环境，即IP不同的环境;

2、让脚本也顺便监控下MySQL是否正常运行;

3、Slave机器的IO和SQL状态都必须为YES，缺一不可，这里用到了多重条件判断-a。

#!/bin/bash
#check MySQL_Slave Status
#crontab time 00:10
Mail-list=
MysqlUser=
MysqlPass=
MYSQLPORT=`netstat -na|grep "LISTEN"|grep "3306"|awk -F[:" "]+ '{print $5}'`
MYSQLIP=`ifconfig eth0|grep "inet addr" | awk -F[:" "]+ '{print $4}'`
STATUS=$(/usr/local/mysql/bin/mysql -u $MysqlUser -$MysqlPass -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 $2}'`
if [ "$MYSQLPORT" == "3306" ]
then
echo "mysql is running"
else
/bin/mail -s "warning!server: $MYSQLIP mysql is down" $Mail-list
fi
if [ "$IO_env" = "Yes" -a "$SQL_env" = "Yes" ]
then
echo "Slave is running!"
else
echo "####### $date #########" >> /tmp/check_mysql_slave.log
echo "Slave is not running!" >> /tmp/check_mysql_slave.log
echo "Slave is not running!"
#mail -s "warn! $MySQLIP_replicate_error" $Mail-list << /tmp/check_mysql_slave.log
echo "`cat /tmp/check_mysql_slave.log`" |mail -s "Warning...slave is not running!!" $Mail-list
fi

使用方式：

用crontab设置定期运行，建议每十分钟运行一次

*/10 * * * * /root/mysql-slave-status.sh

记得在每台MySQL从机上分配一个jiankong的用户，权限大些也没关系，只限定在本地运行，如下所示：

grant all privileges on *.* to "jiankong"@"127.0.0.1" identified by "jiankong1*0*1";

grant all privileges on *.* to "jiankong"@"localhost" identified by "jiankong1*0*1";

以上内容就是自动监控从MySQL同步的脚本，希望大家能有所领会。

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