web服务器php、mysql的健康状态检测

有时候php业务的网站突然无法访问，我们会去查找原因，首先会判断是不是web服务器挂了，然后再去查询是不是数据库挂了，这里提供一个脚本自动去检测是web服务器和数据库服务器，去确定到底是哪个服务器挂掉，并自动去启动相对应的服务！# vi check.sh#!/bin/shcd /usr/local/sbin
test -e "checkweb.php" && rm -rf checkweb.php
test -e "checkdb.php" && rm -f checkdb.php
test -e "wget-log" && rm -f wget-log
test -e "wget-log.1" && rm -f wget-log.1wget -b "http://127.0.0.1/checkweb.php" > /dev/null 2>&1
wget -b "http://127.0.0.1/checkdb.php" > /dev/null 2>&1
sleep 2checkweb=`cat checkweb.php`
checkdb=`cat checkdb.php`if
[ "$checkweb" == "ok" ] ;then
echo "`date +%d/%m/%Y:%H:%M:%S` - - Webserver successfully!"
if
[ "$checkdb" == "ok" ] ;then
echo "`date +%d/%m/%Y:%H:%M:%S` - - Mysql connected successfully!"
echo " "
echo "-------------------------------------------------------------"
elif
[ "$checkdb" != "ok" ] ;then
/etc/init.d/mysqld restart
echo "`date +%d/%m/%Y:%H:%M:%S` - - Mysql connected bad!restart successful!"
curl "http://sms.api.bz/fetion.php?username=150********&password=******&sendto=150********&message=php连接数据库失败，数据库重启成功！"
echo " "
echo "-------------------------------------------------------------"
fi
exit 0
elif
[ "$checkweb" != "ok" ] ;then
killall -9 nginx
/usr/local/nginx/sbin/nginx
/usr/local/php-fcgi/sbin/php-fpm restart
echo "`date +%d/%m/%Y:%H:%M:%S` - - Webserver is down!restart successfully!"
wget -b "http://127.0.0.1/checkdb.php" > /dev/null 2>&1
sleep 2
checkdb2=`cat checkdb.php`
if
[ "$checkdb2" == "ok" ] ;then
echo "`date +%d/%m/%Y:%H:%M:%S` - - Mysql connected successfully!"
curl "http://sms.api.bz/fetion.php?username=150********&password=******&sendto=150********&message=php服务器down机，重启成功！"
echo " "
echo "-------------------------------------------------------------"
elif
[ "$checkdb2" != "ok" ] ;then
/etc/init.d/mysqld restart
echo "`date +%d/%m/%Y:%H:%M:%S` - - Mysql connected bad!restart successful!"
curl "http://sms.api.bz/fetion.php?username=150********&password=******&sendto=150********&message=php服务器，mysql服务器down机，重启成功！"
echo " "
echo "-------------------------------------------------------------"
fi
exit 0ficheckweb.php内容:<?php
echo "ok";
?>;checkdb.php内容：<?php
//测试php数据库链接状态的脚本
$mysql_user = "dbuser";
$mysql_password = "dbpwd";$link = mysql_connect("localhost",$mysql_user,$mysql_password) or die("bad");
print ("ok");
mysql_close($link);
?>
#crontab -e*/2 * * * * /usr/local/sbin/check.sh >> /var/log/check.log本文出自 “技术成就成就梦想” 博客，请务必保留此出处http://lin128.blog.51cto.com/407924/290021