#教程# 监控MYSQL进程有故障则自动重启脚本

监控MYSQL进程的脚本，故障则重启，如无法启动则Email通知;

监控 MYSQL 进程的脚本，故障则重启，如无法启动则 Email 通知;

功能：

监控 MYSQL 进程，故障则重启，如无法启动则 Email 通知

#!/bin/bash

#/usr/bin/nmap localhost | grep 3306

#lsof -i:3306

MYSQLPORT=`netstat -na|grep "LISTEN"|grep "3306"|awk -F[:" "]+ '{print $5}'`

function checkMysqlStatus(){

/usr/bin/mysql -uroot -p11111 --connect_timeout=5 -e "show databases;" &>/dev/null 2>&1

if [ $? -ne 0 ]

then

restartMysqlService

if [ "$MYSQLPORT" == "3306" ];then

echo "mysql restart successful......"

else

echo "mysql restart failure......"

echo "Server: $MYSQLIP mysql is down,please try to restart mysql by manual!" > /var/log/mysqlerr

#mail -s "WARN! server: $MYSQLIP mysql is down" info@yunloc.com < /var/log/mysqlerr

fi

else

echo "mysql is running..."

fi

}

function restartMysqlService(){

echo "try to restart the mysql service......"

/bin/ps aux |grep mysql |grep -v grep | awk '{print $2}' | xargs kill -9

service mysql start

}

if [ "$MYSQLPORT" == "3306" ]

then

checkMysqlStatus

else

restartMysqlService

fi

把脚本保存为 mysql_status.sh，这里建议每十分钟运行一次

*/10 * * * * /root/mysql_status.sh

具体原理：

先检测 MYSQL 的 3306 端口是否正常；

使用帐号连接数据库并执行 show databases 命令；

如以上两点都能正常工作则表示数据库运行正常。