NSCA using PROCESS_FILE

[Thomas Guyot-Sionnest]

> -----Original Message-----
> From: nagios-devel-bounces at lists.sourceforge.net 
> [mailto:nagios-devel-bounces at lists.sourceforge.net] On Behalf 
> Of Joerg Linge
> Sent: March 1, 2007 10:01
> To: Nagios Developers List
> Subject: Re: [Nagios-devel] NSCA using PROCESS_FILE
> 
> Hi List,
> 
> just an other way to do a bulk update.
> Let nagios write to a File in append Mode.
> 
> nagios.cfg:
> service_perfdata_file=/usr/local/nagios/var/service-perfdata
> service_perfdata_file_mode=a
> 
> Nagios will write a line as defined in 
> "service_perfdata_file_template"
> 
> Next let nagios rotate the file every 20 seconds by starting 
> the command defined in service_perfdata_file_processing_command.
> 
> nagios.cfg:
> service_perfdata_file_processing_interval=20
> service_perfdata_file_processing_command=process-service-perfdata-file
> 
> The command process-service-perfdata-file is a simple move to 
> a spool directory.
> 
> define command{
>         command_name    process-service-perfdata-file
>         command_line    /bin/mv 
> /usr/local/nagios/var/service-perfdata  
> /usr/local/nagios/var/spool/service-perfdata.$TIMET$
>         }
> 
> Nagios will close the Filehandle and move the file to 
> /usr/local/nagios/var/spool
> 
> Now a little Perl Daemon ( or perhaps incrond ) watches 
> /usr/local/nagios/var/spool  and processes the data in one block.
> Also put /usr/local/nagios/var/spool on a ramdisk to minimize Disk IO.
> 
> So without a FIFO there is no blocking situation and no data loss.
> 
> What do you think abut that ? 

With all your respect my daemon can send bulk updates at the interval you
want or as fast as possible (will likely fork for each and every line
written by Nagios is set that way), can be set with a maximum queued items
to flush data earlier, is very fast yet very simple (Thanks to Event::Lib)
and avoid the need for Nagios to rotate logs.

See the thread titled "[Nagios-devel] Piped OCHP/OCSP daemon" for the
mini-Howto (I will extend it soon) and my replies to it for latest daemon
version.

Thomas
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