[SATLUG] program or cron job to ping internal devices & email
cd_satl at futuretechsolutions.com
Wed Jan 16 14:35:50 CST 2008
Tom Weeks wrote:
> On Wednesday 16 January 2008 11:07:48 Bruce Dubbs wrote:
>> twistedpickles wrote:
>>> Does know or have a program or cron job that can ping network devices and
>>> if down send out an email?
>> You can try some variation of:
>> function pingit
>> echo -n "Pinging $1 "
>> s=`ping -w$2 -q $1`
>> echo $s | grep duplicate > /dev/null && field=-f20
>> loss=`echo $s|cut -d" " $field`
>> echo "-- $loss packet loss ($3)"
>> if [ $# -eq 0 ]; then timeout=10; else timeout=$1; fi
>> pingit 172.24.0.3 $timeout phobos0
>> pingit 172.24.0.5 $timeout venus0
>> pingit 172.21.0.3 $timeout deimos0
>> Note that there are a couple variations of the ping program. You want
>> the one from iputils: http://www.linux-foundation.org/en/Net:Iputils
> I wrote something similar to this back in the day when I was graphing my ISPs
> uptime (provided network availability).
> Matt.. one way of easily doing this yourself too is to rely on ping's exit
> status in bash of $?. After doing a couple of "ping -c 1 $target", and echo
> (or save) $?, it will=0 if the ping was successful, or >=1 if it did not
> reach the destination.
> Like this if successful:
> STATUS=$(ping -c 1 xcssa.org >/dev/null 2>&1;echo $? )
> echo $STATUS
> or this if unsuccessful:
> STATUS=$(ping -c 1 xxx >/dev/null 2>&1;echo $? )
> echo $STATUS
> Based on this, and a little more scripting and time delays (sleep 30s) and
> fileredirection (like "echo $STATUS >> ping-status_$(date +%Y-%m-%d)" ) you
> can easily come up with a system to monitor systems.
> However... if you're really not wanting to write something like this.. then
> what they others were suggestions about both clientless (and client based)
> monitoring systems like bbrother, nagios, etc are also good, ready to go
I've also done something similar with a rather ugly little perl script
that I used when I was on an unstable DSL connection. If it could not
ping out, it would call a program to power cycle the DSL modem, but
could be made to do almost anything. If interested, I could look for
it, and pass it along.
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