此脚本首先判断mysql服务器是否运行，如果正常，继续判断主从，否则发邮件告警,只发一次。

判断主从状态是判断IO和SQL线程是否都为yes，如果不是则发邮件通知，只发一次。

复制代码 代码如下:

#!/bin/bash

#define mysql variable

mysql_user="root"

mysql_pass="123456"

email_addr="slave@jb51.net"

mysql_status=`netstat -nl | awk 'NR>2{if ($4 ~ /.*:3306/) {print "Yes";exit 0}}'`

if [ "$mysql_status" == "Yes" ];then

slave_status=`mysql -u${mysql_user} -p${mysql_pass} -e"show slave statusG" | grep "Running" | awk '{if ($2 != "Yes") {print "No";exit 1}}'`

if [ "$slave_status" == "No" ];then

echo "slave is not working!"

[ ! -f "/tmp/slave" ] && echo "Slave is not working!" | mail -s "Warn!MySQL Slave is not working" ${email_addr}

touch /tmp/slave

else

echo "slave is working."

[ -f "/tmp/slave" ] && rm -f /tmp/slave

fi

[ -f "/tmp/mysql_down" ] && rm -f /tmp/mysql_down

else

[ ! -f "/tmp/mysql_down" ] && echo "Mysql Server is down!" | mail -s "Warn!MySQL server is down!" ${email_addr}

touch /tmp/mysql_down

fi