[CentOS] Recommendation On Ping And Alert Tool

Thu Sep 22 20:11:10 UTC 2005
William A. Mahaffey III <wam at HiWAAY.net>

CentOS mailing list wrote:

> Kennedy Clark wrote:
>
>> A bit off topic, but I keep looking for an answer to this question 
>> and coming up with nothing... so I thought I would go to the gurus. :-)
>>  
>> Can anyone recommend a good package for pinging other devices and 
>> sending an email/alert when they go down?  I'm aware of all kinds of 
>> more complex things with GUIs and a zillion other bells and whistles 
>> we aren't looking for, but we just want a simple tool (could be 
>> daemon or something run from cron) that runs every 1 - 5 minutes and 
>> alerts us when stuff disappears.  Would need some basic logic like 
>> only sending one email/alert when something goes down (vs sending an 
>> email every 1-5 minutes until it comes back up). :-)  We need to 
>> avoid a requirement for an X-windows GUI, but a web-GUI would 
>> probably be fine (a GUI-less command-line thing would probably be best).
>
>
> Bash. Here is what I use for monitoring my website
>
> #!/bin/bash
>
> URL="http://www.911networks.com"
> EMAIL="artsi at fartsi.com"
>
> lynx -dump "$URL" > /dev/null
> if [ $? -ne 0 ]; then
>     echo "`date "+%F %T"` - $URL is down" | mail -s "$URL is down" $EMAIL
> fi
>
> Watch for the wraps and make it executable [chmod 7xx]
>
>

This is the sort of thing I was going to suggest. You could go 1 better 
& have it resubmit itself periodically w/ at(1). Maybe get it to do some 
argument parsing so you could pass in the URL, EMAIL, then invoke plural 
instances for however many things you want to monitor ....

-- 
	William A. Mahaffey III
---------------------------------------------------------------------
	Remember, ignorance is bliss, but
	willful ignorance is LIBERALISM !!!!