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2844 Views 3 Replies Latest reply: Jan 24, 2012 2:26 PM by jcurry RSS
David Sloboda Rank: White Belt
David Sloboda
64 posts since
Nov 29, 2007
Currently Being Moderated

Jan 19, 2012 2:35 PM

How to pull Datasource from nagios style script and zencommand?

Zenoss 3.2.1 on RHEL5

 

I have a nagios-style command in libexec that works great.  Command output is in the format:

    Datasource|Datapoint=integer

and the threshold detects on Datapoint.  So far, so good.

 

[zenoss@bby1ems05 ~]$ /opt/zenoss/libexec/lsload-query-command.py

ERROR: kel-lx62 has low free swap, only [2232M] |result=2

[zenoss@bby1ems05 ~]$

 

The challenge I have is that this particular command can produce useful detail in Datasource.

I would like to put that detail into the evt.message

It would help staff who get the alert and who are not Zenoss administrators.

 

[zenoss@bby1ems05 libexec]$ ./lsload-query-command.py

ERROR: kel-lx19 has low free swap, only [7792M]ERROR: kel-lx25 has low free swap, only [4M]ERROR: kel-lx52 has low free swap, only [0M] |result=2

[zenoss@bby1ems05 libexec]$

 

I've searched the forum and these posts, and Jane Curry's event management paper

docs/DOC-2514

docs/DOC-3909

thread/15493

 

I suspect Datasource is thrown away.  I would like to confirm that somehow.


If that part of the output is thrown away, does anyone have any suggestions on how to find that data using an event transform? 

 

Thanks,

David Sloboda

Tags: zencommand, 3.2.1
  • jcurry ZenossMaster
    jcurry
    1,021 posts since
    Apr 15, 2008
    Currently Being Moderated
    1. Jan 24, 2012 1:09 PM (in response to David Sloboda)
    Re: How to pull Datasource from nagios style script and zencommand?

    If the exit status of your script is anything other than 0 (OK), then the text from the datasource is all provided in the event's summary field.  If you wanted to then extract parts of that, you could use an event transform to do stuff.

    Cheers,

    Jane

  • David Sloboda Rank: White Belt
    David Sloboda
    64 posts since
    Nov 29, 2007
    Currently Being Moderated
    2. Jan 24, 2012 1:30 PM (in response to jcurry)
    Re: How to pull Datasource from nagios style script and zencommand?

    Thanks for the reply.

     

    When you say "the exit status of your script is anything other than 0"

    I assume "exit status" is the same thing as the "result" variable I am (successfully) using for the threshold

    as in

    [zenoss@bby1ems05 libexec]$ ./lsload-query-command.py

       ERROR: kel-lx79 has low free swap, only [0M] |result=2

    [zenoss@bby1ems05 libexec]$

     

    I've got it to produce what I want by forcing a sub command in the event transform for the Event Class as follows:

     

    import re

    # see docs/DOC-2554

    match = re.search('threshold of number-two exceeded', evt.message)

    if match:

        evt.summary="At least one LSF execution host has very low free swap"

        cmd = "ssh -q adminhost /path/to/python/Zenoss/lsload-query.py -t 1"

        import os

        status = str(os.popen(cmd).read())

        evt.message =  status + "\n" + evt.message + "\n"

     

     

    I will experiment more with evt.summary and see if I can get what I am looking for without the sub command.

     

    Thank you,

    David

  • jcurry ZenossMaster
    jcurry
    1,021 posts since
    Apr 15, 2008
    Currently Being Moderated
    3. Jan 24, 2012 2:26 PM (in response to David Sloboda)
    Re: How to pull Datasource from nagios style script and zencommand?

    No - exit status is not the same as your result variable.  Here is my little test command:

     

    #!/bin/sh

     

    # Nagios return codes

    STATE_OK=0

    STATE_WARNING=1

    STATE_CRITICAL=2

    STATE_UNKNOWN=3

    #

    exitstatus=$STATE_OK

     

    # Nagios format echos information and status followed by pipe |

    #  followed by <var name>=<value> tuples

    # Note that Zenoss datapoints must match these var names exactly

    #

    echo "This is a test - status OK | timevar=1s sizevar=2B percentvar=10% countervar=123c"

    exit $exitstatus

     

    If $exitStatus is anything other than 0 then you get an event whose summary is

    This is a test - status OK

    ie everything upto the pipe symbol.  In addition, you get the timevar, sizevar, percentvar and countervar datapoints.

     

    Cheers,

    Jane

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