Verion 2.0b4 how does cgi's nagios_check_command work?

[John P. Rouillard]

In message <43465AB9.6020304 at op5.se>,
Andreas Ericsson writes:
>John P. Rouillard wrote:
>> Hi all:
>> 
>> I have groveled through the cgi files in nagios 2.0b4 and I can't find
>> any instance of the nagios_check_command actually being executed. Am I
>> just missing it somewhere?
>> 
>
>The nagios_check_command has been incorporated into the cgi's. That's 
>why the status.dat file has the nagios entry on top.

So the CGI's report nagios is down if and only if the status.date file
is missing? That matches what I see when I shut down nagios properly.
If I shut down nagios I see the "Error: Could not read host and
service status information!" page in the web interface.

>>     cgiutils.c load the variable from the config file
>>     extinfo.c  checks to see if the variable is empty and produces a nice
>>                little warning if it is.
>> 
>> but nothing seems to actually execute the command. The reason I ask is
>> that nagios was down and the cgi's all happily reported that it was
>> up. Could this be because the host and service status files were
>> available since the machine crashed?
>Yes, that's almost certainly it. There is no really good way of 
>detecting that nagios is actually running unless you're logged in as 
>root.

Hmm, I am not sure I follow why you need to be logged in as root.  Why
not stat the status.log file and check to see if its (mtime) timestamp
is less than the setting of:

	status_update_interval*2

if aggregate_status_updates is enabled? One could also allow a setting
"freshness_threshold" in cgi.cfg that is the number of seconds/minutes
old the status.dat file is allowed to be if aggregate_status_updates
isn't set.

> Noone (sane) runs their webserver as root.

True enough.

				-- rouilj
John Rouillard
===========================================================================
My employers don't acknowledge my existence much less my opinions.


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