processing performance data - input, corrections solicited

[Martin C. Walker]

Thanks Ted.  

Well perhaps I misunderstood the documentation.  It looks like the performance
processing stuff must be done on the machine that executes the checks.  Is this NOT true?

I did in fact try performance processing on the remote sensor machines (--with-default-perfdata)
on the remote machines that actually do the tests.  I had a few problems:
	- it appears that most plugins don't output performance data (this is referenced in the docs too)
	- even though my default template for services had process_perf_data set to 0 and only those
	  services I wanted data for had it explicitly set to 1 I got an entry in the file for each check executed

Given that I need to pull the data from the output rather than the performance data, and that I need to filter for only the lines
I'm interested in, I see no value in using perfdata over the nagios.log.

did I do something wrong?  what am I missing?

> Maybe I didn't understand some part, but why can't you run a Process
> Performance Data command on the central server?
> 
> The perfdata command (on the central server) would parse any information you
> want (available via macros) and put them into the RRDs.  Or, if you're using
> the file-based method, you can run the rrd-update script from cron, which
> parses the central server's perf-data-file every so often (again, use the
> macros to pass any information you need to the command).
> 
> 
> "Martin C. Walker" <walk2137 at bellsouth.net> wrote in message
> news:3EFF60D4.5070203 at bellsouth.net...
> > I am trying to process performance data to generate rrd's which I can
> > then use with APAN, Cacti and some other stuff.
> >
> > I am in a distributed monitoring environment.  Remote nagios boxen
> > execute service checks against their various local machines and send the
> > results back to the central host via nsca over stunnel.  central box
> > cannot check remote hosts and services.  it is passive only.
> >
> > Now I want to generate rrd's which have to live on the central host (not
> > each individual machine).  I do not want to execute each check more than
> > once (ie NOT once for nagios and once for performance data) and I do not
> > want to repetitively copy rrd's from the remote boxen to the central
> > host.  that means that the data used to create the rrd's comes from the
> > service check output.
> >
> > it doesn't look like there is any benefit to using nagios
> > process_perf_data as that only gives me a line of text data on the
> > sensor box which I still have to parse and send to the central box for
> > processing into rrdtool.  It looks like I can get everything I need from
> > nagios.log entries on the central box.  that includes the timestamp,
> > host, service, results output.
> >
> > so, what I plan on doing is writing a daemon (perl probably) that reads
> > input lines from nagios.log and matches them against a configuration
> > file to see if they are of interest (obviously I'm not graphing every
> > service check).  if the result is to be graphed I then pull out the
> > interesting data and do an rrdupdate with it.
> >
> > its the pulling out of interesting data that has me stumped.  I was
> > planning on a configuration file that had entries of the form
> >
> > SENSOR_NAME;HOST_NAME;SERVICE_NAME;DSN1:expr1;[DSN2:expr2;...DSNn:exprn;]
> >
> > my daemon would match host_name and service_name entries in the
> > nagios.log file and update the rrdfile in
> > /usr/local/rra/$SENSOR_NAME/$HOST_NAME/$SERVICE_NAME.rrd
> >
> > using -template and the DSN names defined in the configuration file.
> > The expression associated with each DSN in the configuration file is the
> > string manipulation code to apply to the output string in the nagios.log
> > to pluck out the data that goes into the rrd file.
> >
> > So, my questions, before I (attempt to) write all this:
> > 1.  is this the way to go or am I missing something?
> > 2.  if it is the way to go, has someone already written it?
> > 3.  if not, can anyone give me some pointers on what to use and how to
> > write the expr bits?
> >
> > I am planning on using perl since it is supposed to have good string
> > manipulation and has rrdtool bindings.  Learning Perl will be part of
> > this effort since I havn't done much more than print "Hello World\n"
> > with it.  Is Perl the best choice for this?
> >




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