[K12OSN] Script for checking if servers are up.

[Doug Simpson]

I don't have it setup where I can ping the servers by name. I need to beable to ping them by IP but send the name instead of IP.

Interesting script!

Doug

Doug Simpson
Technology Specialist
De Queen Public Schools
De Queen, AR
simpsond at leopards.k12.ar.us

>>> Dimitri Yioulos <dyioulos at firstbhph.com> 10/18/2007 2:29 PM >>>
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

I don't have it setup where I can ping the servers by name. I need to beable to ping them by IP but send the name instead of IP.

Interesting script!

Doug