Nagios 3.0b5 - ePN and perl caching [SEC=UNCLASSIFIED]

[Stanley.Hopcroft at Dest.gov.au]

Dear Larry, 

There are debugging hooks in p1.pl that would be useful to enable. 

If you are interested in helping deal with this problem please would you


1 Back up your original copy of p1.pl (path is specified in nagios.cfg
IIRC) 

2 Change the DEBUG_LEVEL to 

use constant  DEBUG_LEVEL             => LEAVE_MSG | CACHE_DUMP ; 

3 Change the DEBUG_LOG_PATH to something appropriate for your system eg 

use constant    DEBUG_LOG_PATH => '/tmp/' ; 

4 Make p1.pl still compiles (perl -c p1.pl should be nag free; $? == 0) 

5 Restart Nagios 

(IIRC, all this is documented in POD format in p1.pl, so perldoc p1.pl
should show 

... blah blah 

      Extra logging is given by setting DEBUG_LEVEL to include 

       LEAVE_MSG 

       1 opens an extra output stream in the path given by the value of 
       DEBUG_LOG_PATH 

       2 logs messages describing the success or otherwise of the plugin
com- 
       pilation and the result of the plugin run. 

       An example of such messages are 

        Fri Apr 22 11:54:21 2005 eval_file: successfully compiled
"/usr/local/nagios/libexec/check_bass ". 
        Fri Apr 22 11:54:21 2005 run_package:
"/usr/local/nagios/libexec/check_bass " returning ("0", "BASS
Transaction completed Ok.

        "). 
        Fri Apr 22 11:55:02 2005 eval_file: successfully compiled
"/usr/local/nagios/libexec/check_ad -D production.prod -S".

        Fri Apr 22 11:55:02 2005 run_package:
"/usr/local/nagios/libexec/check_ad -D foo.dom -S" returning ("0", "Ok.
Expected 2 domain controllers [foo1 foo2] for "foo.dom.prod" domain from
"1.1.2.3" DNS, found 8 [foo1 foo2 ..]

        "). 

.. blah blah 
) 

In my case I see 


[root at acisp057 bin]# perl -c p1.pl 
p1.pl syntax OK 
[root at acisp057 bin]# diff -c p1.pl.orig p1.pl 
*** p1.pl.orig  2007-10-12 14:09:24.000000000 +1000 
--- p1.pl       2007-10-12 14:09:56.000000000 +1000 
*************** 
*** 10,22 **** 
  use constant  CACHE_DUMP              => 2 ; 
  use constant  PLUGIN_DUMP             => 4 ; 
  
! use constant  DEBUG_LEVEL             => 0 ; 
  # use constant        DEBUG_LEVEL             => CACHE_DUMP ; 
  # use constant        DEBUG_LEVEL             => LEAVE_MSG ; 
! # use constant        DEBUG_LEVEL             => LEAVE_MSG |
CACHE_DUMP ; 
  # use constant        DEBUG_LEVEL             => LEAVE_MSG |
CACHE_DUMP | PLUGIN_DUMP ; 
  
! use constant  DEBUG_LOG_PATH          => '/usr/local/nagios/var/' ; 
  # use constant        DEBUG_LOG_PATH          => './' ; 
  use constant  LEAVE_MSG_STREAM        => DEBUG_LOG_PATH .
'epn_leave-msgs.log' ; 
  use constant  CACHE_DUMP_STREAM       => DEBUG_LOG_PATH .
'epn_cache-dump.log' ; 
--- 10,22 ---- 
  use constant  CACHE_DUMP              => 2 ; 
  use constant  PLUGIN_DUMP             => 4 ; 
  
! # use constant        DEBUG_LEVEL             => 0 ; 
  # use constant        DEBUG_LEVEL             => CACHE_DUMP ; 
  # use constant        DEBUG_LEVEL             => LEAVE_MSG ; 
! use constant  DEBUG_LEVEL             => LEAVE_MSG | CACHE_DUMP ; 
  # use constant        DEBUG_LEVEL             => LEAVE_MSG |
CACHE_DUMP | PLUGIN_DUMP ; 
  
! use constant  DEBUG_LOG_PATH          => '/tmp/' ; 
  # use constant        DEBUG_LOG_PATH          => './' ; 
  use constant  LEAVE_MSG_STREAM        => DEBUG_LOG_PATH .
'epn_leave-msgs.log' ; 
  use constant  CACHE_DUMP_STREAM       => DEBUG_LOG_PATH .
'epn_cache-dump.log' ; 

and 

[root at acisp057 nagios]# more /tmp/epn_leave-msgs.log 
Fri Oct 12 14:17:08 2007 eval_file: successfully compiled
"/usr/lib/nagios/plugins/check_sysUpTime -R 10.208.1.254". 
Fri Oct 12 14:17:08 2007 run_package:
"/usr/lib/nagios/plugins/check_sysUpTime -R 10.208.1.254" returning (0,
"sysUpTime of router 1

0.208.1.254 is 231 days, 18:14:31.55"). 
Fri Oct 12 14:17:17 2007 eval_file:
/usr/lib/nagios/plugins/check_sysUpTime already successfully compiled
and file has not changed; 

skipping compilation. 
Fri Oct 12 14:17:17 2007 run_package:
"/usr/lib/nagios/plugins/check_sysUpTime -R 10.36.103.254" returning (0,
"sysUpTime of router 

10.36.103.254 is 269 days, 00:03:26.48"). 
Fri Oct 12 14:17:22 2007 eval_file: successfully compiled
"/usr/lib/nagios/plugins/check_backuplinks -N "BRUSW200"". 
Fri Oct 12 14:17:22 2007 run_package:
"/usr/lib/nagios/plugins/check_backuplinks -N "BRUSW200"" returning (0,
"Ok. All links from br

usw200/10.0.254.167 to mtasw200 via Etherchannel  _are_ in "up"
operational status. Redundant topology Ok."). 
[root at acisp057 nagios]# 

Unfortch, although the log stream should be unbuffered, it wasn't being
flushed while Nag was running. I had to restart Nag again to

get the messages flushed (when I changed the path for the log messages).


You prob should ensure that the problem plugin is scheduled frequently
(eg each 5 mins) and let it run for about 5 check periods.

Please post the results to the list. 

Thank you, 

Yours sincerely. 



Stanley Hopcroft 

Data Communications 

02 6211 6110 
0412 766 832 
  

Classification: UNCLASSIFIED


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