[K12OSN] Script for checking if servers are up.

[Dimitri Yioulos]

On Thursday 18 October 2007 3:29 pm, Dimitri Yioulos wrote:
> On Thursday 18 October 2007 2:11 pm, Doug Simpson wrote:
> > Thanks to all for the replies. I guess I should clarify what I am
> > attempting to do here.
> >
> > I looked at the programs and etc submitted by all of you and while they
> > are probably good at what they do, they don't do what I am wanting to do.
> > The references in the script I submitted are for reference only. IP
> > addresses are not actual and are actually the servers are on several
> > campuses, several LANs and some are even over a WAN. I can ping all of
> > the servers I want to use this for from the one I want to run the script
> > on.
> >
> > When I complete the script and get it running properly, the |mail -s "222
> > is
>
> down" me at here.there will be substituted with something like:
> > |festival --tts and festival has a hard time speaking IP addresses. The
> > | script will audibly announce the name of the server that is down.
> >
> > This script will be run from a linux server that is on all the time, and
> > the script will run in the background whether anyone is logged in or
> > not.If a server goes down (ie a ping test fails) it will audibly say
> > something like "Please check Room tewnty seven's server. It appears to be
> > down." No one must be logged in and watching the script run. It just does
> > it's thing silently until it detects a down server. If the script runs
> > continuously in a loop, it will keep repeating the message every trip
> > through the script until the problem is corrected.
> >
> > Kinda funny, but I find the audible messages are GREAT for monitoring
> > things. If all is well, he's quiet. If there are problems, he lets you
> > know about it. I have done similar things with simple cron jobs, but the
> > script will be better in this instance, I think.
> >
> > Doug Simpson
> > Technology Specialist
> > De Queen Public Schools
> > De Queen, AR
> > simpsond at leopards.k12.ar.us
> >
> > >>> "David Hopkins" <dahopkins429 at gmail.com> 10/18/2007 12:43 PM >>>
> >
> > That is what I would try, but are all your servers on the same
> > 192.168subnet? If they have 2 NIC's, shouldn't you be using the other
> > interfaces IP
> > address instead of the one used for the thin clients?
> >
> > On 10/18/07, Huck <dhuckaby at paasda.org> wrote:
> > > double-replying..
> > >
> > > $list = 192.168.0.222,192.168.0.223
> > >
> > > for $x in $list
> > > do
> > > sleep 30
> > > if ping -i 3 -c 3 $x
> > > then continue
> > > else
> > > echo "$x down!" | mail -s "222 down" veewee777 at alltel.net
> > > break
> > > fi
> > > done
> > >
> > >
> > >
> > >
> > > something like that?
> > >
> > > Doug Simpson wrote:
> > > > I am trying to make a script that will ping servers and if they are
> > >
> > > down, send a message. If they are up it won't send a message.
> > >
> > > > The problem I am having is if there are more than one, it won't work.
> > > >
> > > > Here is a sample of my script:
> > > > **********sample begins below*************
> > > > while (true)
> > > > do
> > > > sleep 30
> > > > if ping -i 3 -c 3 192.168.0.222
> > > > then
> > > > continue
> > > > else
> > > > echo "192.168.0.222 down!" | mail -s "222 down" veewee77 at alltel.net
> > > > break
> > > > fi
> > > > done
> > > > **********sample ends above***************
> > > >
> > > >
> > > > If I add a second (or more) to it, it fails to work properly.
> > > > **********broken sample begins below********
> > > > while (true)
> > > > do
> > > > sleep 30
> > > > if ping -i 3 -c 3 192.168.0.222
> > > > then
> > > > continue
> > > > else
> > > > echo "192.168.0.222 down!" | mail -s "222 down" me at here.there
> > > > break
> > > > fi
> > > > if ping -i 3 -c 3 192.168.0.223
> > > > then
> > > > continue
> > > > else
> > > > echo "192.168.0.223 down!" |mail -s "223 down" me at here.there
> > > > done
> > > > ***********broken sample ends above**************
> > > >
> > > > Obviously a bogus email address, but it is for reference.
> > > >  Any ideas?
> > > >
> > > > Doug
> > > >
> > > > Doug Simpson
> > > > Technology Specialist
> > > > De Queen Public Schools
> > > > De Queen, AR
> > > > simpsond at leopards.k12.ar.us
>
> <CLIP>
>
>   #!/bin/bash
>   cat hostlist |  while read line
>   do
>   pingcount=$(ping -c 1 $line |grep received|awk -F',' '{print $2}'|
> awk '{print $1}')
>   if [ $pingcount -eq 0 ]; then
>   echo "$line is unreachable. Please check, and reboot, if necessary"|
> mail -s "$line unreachable" myaddress at mydomain.com
>   fi
>   done
>
> "hostlist can be the ip addresses or hostnames of your servers.
>
> Dimitri

addendum: This should be cronned.

Dimitri

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.