#!/bin/bash
##
#Program: 此脚本利用curl工具下载网站首页的头部信息来侦测是否发生502错误
#
#Contact：http://www.ninthday.net
##
 
# 设定需要监控的网站的URL #
site="http://www.ninthday.net"
# 定义发送/接收通知邮件的邮箱与收/发信人名称 #
receiver_email="*****@126.com"
sender_email="root@ninthday.net"
recevier="******"
sender="root"
# 定义发送邮件的函数 #
function run_502(){
    sendmail -t <
To: $receiver
Subject: VPS has encountered a 502 error!
-------------------------------------------------------------------
The VPS has encountered a 502 error! Please restart the related services.
-------------------------------------------------------------------
EOF
}
 
# 开始检测 #
stat=`curl -I $site | head -1 | cut -d ' ' -f2`
if [ $stat == "502" ]; then
    run_502
fi
exit 0

*/10 * * * * sh /usr/local/nginx/conf/detect502.sh