shell 监控mysql状态

#!/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 -paaaaaa --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, !" > /var/log/mysqlerr
#mail -s "WARN! server: $MYSQLIP mysql is down" root@admin < /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
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