[hobbit] Alert if a list of devices that are not related are all down?

Tue Oct 6 00:37:00 CEST 2009

I created the page with all the printers on it.

#----------------------------------------------------------------------
#               PowerWatch - Watch multiple printers per building
#               Requires some scripting see Email archive 5Oct2009
#----------------------------------------------------------------------
page PW <h4>Power Watch</h4>
group-compress <h4>Building E&F</h4>
128.170.70.7    Printer007
128.170.70.151  Printer151
128.170.70.14   Printer014
128.170.70.4    Printer004
128.170.70.33   Printer033
128.170.70.142  Printer142
128.170.70.156  Printer156
group-compress <h4>Building C</h4>
128.170.70.10   Printer010
128.170.70.170  Printer170
128.170.70.97   Printer097
group-compress <h4>Building D</h4>
128.170.70.126  Printer126
128.170.70.38   Printer038
128.170.70.70   Printer070
128.170.70.87   Printer087
128.170.70.116  Printer116
group-compress <h4>Building R</h4>
128.170.70.227  Printer227
128.170.70.228  Printer228

I tried the command but there was no output.  I tried it with and without 'lastchange'.

What are BB and BBDISP set to.
When I echo them they are empty.

$BB $BBDISP "hobbitdboard page=PW color=red,green fields=hostname,color,lastchange"
-bash: hobbitdboard page=PW color=red,green fields=hostname,color,lastchange: command not found

[root at monitor1 ~]# su - xymon
[xymon at monitor1 ~]$ echo $BB

[xymon at monitor1 ~]$ echo $BBDISP

[xymon at monitor1 ~]$

Thanks
Tom

-----Original Message-----
From: Henrik "StÃ¸rner [mailto:henrik at hswn.dk] 
Sent: Monday, October 05, 2009 3:28 PM
To: hobbit at hswn.dk
Subject: Re: [hobbit] Alert if a list of devices that are not related are all down?

In <2B2CEF0E4EE10B449E5D9BB95E6DA0E8FD11A0 at MAIL2.csw.l-3com.com> d.tom.schmitt at L-3com.com writes:

>I would like to have XYMON:
>         E.G.  All printers are down at the same time - ALERT
>               All printers just came back up at the same time - NOTIFY/ALERT

>I need to watch multiple printers in a building to see if they are ALL
>down (or come up) at the same time.

>This is the makings of a POWER OUTAGE EVENT for that building since the
>printers are not attached to a UPS.

>If all down, Possible Power Outage

Assuming you have some way of easily identifying your printers
- e.g. they are all on the same webpage in the Xymon display, or
they have some sort of standard name - then you can use the
'hobbitdboard' command to check the status of all of them at 
once.

E.g. if you have all the printers on a page called "printers",
then this would tell you if they were all down:

   #!/bin/sh

   # Grab "conn" status of all systems on "printers" page
   # Only pick the red and green ones, so we ignore those that
   # have been disabled.
   $BB $BBDISP "hobbitdboard page=printers color=red,green test=conn fields=hostname,color" >/tmp/printstatus.$$
   PRINTERCOUNT=`wc -l /tmp/printstatus.$$`
   DOWNCOUNT=`grep '^|red$' /tmp/printstatus.$$ | wc -l`

   if test $PRINTERCOUNT = $DOWNCOUNT
   then
      echo "All printers down!"
   fi

What I would do is feed the information from this script back into
Xymon as a new status - one that shows red if all printers are down,
and green if at least one of them is up. Then you can trigger the
alert from this status, instead of mucking about with the alert
scripts for each of the printers. So you could modify the script
above to become a Xymon server-side extension:

   #!/bin/sh

   # ... beginning is the same ...

   if test $PRINTERCOUNT = $DOWNCOUNT
   then
       # All printers are down
       $BB $BBDISP "status whitehouse.power red `date`
                    Possible power-loss at 1600 Pennsylvania Av"
   else
       # At least one printer is up
       $BB $BBDISP "status whitehouse.power green `date`
                   Power OK"
   fi

And then setup an alert that goes off when the "power" status for
host "whitehouse" goes red.

You'd run the script from hobbitlaunch.cfg every so often, e.g.
to run it every 5 minutes add 
   [powercheck]
       CMD $BBHOME/ext/powercheck.sh
       INTERVAL 5m
to hobbitlaunch.cfg

If you must check if the change for each printer happened "recently"
(e.g. within the past 5 minutes which is the default network test
frequency), then you can add "lastchange" to the list of the fields
retrieved in the hobbitdboard command. That will give you the Unix
timestamp when the status last changed; you can then have the script
compare that to the current timestamp and do whatever appropriate if
the change happened more or less recently. (The GNU 'date' utility 
can give you the current timestamp with "date +%s").

Hope this gives you some inspiration to put this together.

Regards,
Henrik

-- 
Henrik Storner

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