shell监控脚本-监控web server

cat chk_web.sh

#!/bin/bash

#

#script_name:chk_web.sh

#check web server 80 port

#

#last update 20130320 by dongnan

#bbs# http://bbs.ywwd.net/ 
#blog# http://dngood.blog.51cto.com 
#

#curl -IL http://10.0.100.75/check.html 2>&1 | grep '200'

#HTTP/1.1 200 OK

#别忘了在你的web服务器创建一个check.html

#variables

curl=/usr/bin/curl

usleep=/bin/usleep

echo=/bin/echo

sh_dir=/root/sh/

crondir=${sh_dir}crontab

check_count=5        #故障后检查次数

fault_count=4        #故障次数大于(等于),则认为不可用

options='--connect-timeout 1 -IL -A "check_www"'

source ${sh_dir}CONFIG

hosts="$LINUX_WEB_HOSTS"

#main

test -e "${crondir}/log" || mkdir -p "${crondir}/log"

#主循环遍历机器

for HOST in $hosts ;do

flag_file=$crondir/log/"$HOST".web

log=$crondir/log/web_error.log

#curl真

if $curl $options http://"$HOST"/check.html 2>&1 | grep '200' > /dev/null;then

#flag真,解除报警

if [ -f $flag_file ];then

#sms

#for mobile in $MOBILES; do

#$echo "cdn_www ok" | /usr/local/bin/gammu --sendsms TEXT "$mobile" -unicode

#$echo "cdn_www_index.html ok"

#done

#email

for mail in $MAILS;do

echo "$HOST 80 port ok" | mail -s "$HOST 80 port ok" $mail

done

#delete flag

test -e "$flag_file" && rm -f "$flag_file"

fi

#curl假

else

#flag真，跳出循环(已报警)

test -e $flag_file && continue

check_failed=0

#

for((i=1;i<="$check_count";i++));do

check_date=$(date '+ %F %T')

#curl 值取反

if ! $curl $options http://"$HOST"/check.html 2>&1 | grep '200' > /dev/null;then

#变量加1

((check_failed++))

#error.log

$echo "$(/bin/date +'%F %T') $HOST $check_failed fault" >> "$log"

#使用微妙或者秒

$usleep 300000 || sleep 1

fi

done

#大(等)于fault_count发送报警

if [ "$check_failed" -ge "$fault_count" ];then

#sms

#for mobile in $MOBILES;do

#$echo "www_cdn_index.html error" | /usr/local/bin/gammu --sendsms TEXT "$mobile" -unicode

#/bin/date +'%F %T' && $echo "www_cdn_index.html error"

#done

#mail

for mail in $MAILS;do

echo "$HOST 80 port error" | mail -s "$HOST 80 port error" $mail

done

#log

echo "$check_date $HOST web error" >> $log

#flag

$echo "cdn_www_index.html error" > "$flag_file"

fi

#主if结束

fi

#主循环结束

done