Nagios Start-up Failure

[Kevin Keane]

Wheeler, Jonathan (STFC,RAL,ESC) wrote:
>> -----Original Message-----
>> From: Kevin Keane [mailto:subscription at kkeane.com]
>> Sent: 28 August 2009 08:28
>> Cc: Nagios User list
>> Subject: Re: [Nagios-users] Nagios Start-up Failure
>>
>> Wheeler, Jonathan (STFC,RAL,ESC) wrote:
>>     
> (snip)
>   
>>> I have not been following this thread, but one reason that Nagios
>>>       
> fails
>   
>>> at the very end of its start-up is if the command pipe file (ours is
>>>       
> in
>   
>>> /var/log/nagios/rw/nagios.cmd - defined by parameter command_file in
>>>       
> the
>   
>>> main Nagios configuration file) exists as a file rather than a pipe.
>>>       
> On
>   
>>> our installation this can occur during Nagios start-up as some of
>>>       
> our
>   
>>> procedures, running from a cron job, write directly to the command
>>>       
> pipe
>   
>>> and will create it as a standard file if it does not exist.  The
>>> solution is to delete the file and restart the Nagios process.
>>>
>>>       
>> Interesting observation! I haven't tried it, but one possible way to
>> address this is by putting the command pipe file into a directory that
>> is read-only to everybody but user Nagios. As long as the cron jobs
>>     
> run
>   
>> as a different user (and not as user root, who can always write
>> anywhere), they would not be able to create ordinary files in that
>> directory, but they would still be able to access the pipe once Nagios
>> creates it.
>>     
>
> Not at straightforward as that.  The rw directory and the command pipe
> are owned by nagios:HTTPUSER (where HTTPUSER might be http or apache)
> because the command pipe is written by the nsca and nrpe daemons as well
> as the web interface; therefore the cron job runs as userid nagios (not
> root).
>   
Maybe you could change the cron job to run as a different user that is 
member of HTTPUSER?

-- 
Kevin Keane
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