Nagiosgraph graphs have gaps

[Steve Burton]

> Hi Hugo,

> Thanks for the reply I am also facing the same issue. 

> As per you suggestion I have gone through the archieve and found one big
> thread regarding Nagios graph gap.

> https://sourceforge.net/mailarchive/message.php?msg_id=007301c84e20$4def
> 0850$98ad38a6 at na.dsmain.com

> In the thread the working solution as per people is but when I went
> through the it then found 
> We need to make change in ngraph.ncfg but in current nagiosgraph there
> is no such file.

> Pls guide how to solve graph this gap issue.

> In my machine heartbeat is 600 sec and perf_file_iterval is 60 sec.

> thanks

> ==================================================
> Hi,

> the old NagiosGrapher interfaces (network/pipe) can cause huge
> latency :-(. Thanks to a patch we got there is a new interface type
> "file". The main advantages of this new interface are:
> * no gaps any more
> * no latency caused by NagiosGrapher
> * restarting NagiosGrapher does not cause any gaps

> I am sorry but the documentation totally lacks this interface. But below
> is all you need.

> Cheers,

> Gerd




> =20
> ngraph.ncfg:

> interface file
> perffile_path /dev/shm

> nagios.cfg:

> process_performance_data=1
> service_perfdata_file=/dev//shm/service-perfdata
> service_perfdata_file_template=$HOSTNAME$\t$SERVICEDESC$\t$SERVICEOUTPUT
> $\t$SERVICEPERFDATA$\t$TIMET$
> service_perfdata_file_mode=a
> service_perfdata_file_processing_interval=60

> service_perfdata_file_processing_command=3Dprocess-service-perfdata-file


> commands.cfg:
> define command{
> command_name process-service-perfdata-file
> command_line
> mv /dev/shm/service-perfdata /dev/shm/service-perfdata.$TIMET$
> }
> ==================================================



> Thanks & Regards
> Novin Jaiswal
> Ishi Systems Inc.
> 201-521-3155(Direct)
> 732-318-8156(Cell)



> -----Original Message-----
> From: Hugo van der Kooij [mailto:hvdkooij at vanderkooij.org] 
> Sent: Sunday, November 30, 2008 2:44 AM
> To: Nagios Users Mailinglist
> Subject: Re: [Nagios-users] Nagiosgraph graphs have gaps

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1

> Steve Burton wrote:
>> Hi,
>> 
>> I  have  nagios  3.0.4 running on FreeBSD and I'm using nagiosgraph to
>> generate  rrd's  on  the  data.  I'm  visualizing  the  data with both
>> nagiosgraph and drraw.
>> 
>> My  problem  is that the graphs have gaps so I guessing that the rrd's
>> are  not  being  updated.  I'm  concentrating  on just one service for
>> debugging   and   I've  run  the  plugin  (which  I  wrote)  from  the
>> command-line  many times for a local server and I haven't seen it fail
>> to  connect  or  report  or to time out. It is as though nagios is not
>> checking  the service within the heartbeat of the rrd's in question. I
>> have  set  the service check interval to 5 minutes, which I believe to
>> be  the  default nagiosgraph step time and the heartbeat is set to the
>> nagiosgraph default of 600 seconds.
>> 
>> Can anyone advise me if if this is likely to be the problem and if not
>> how I can diagnose what is actually going on?

> I have put a diagnose on the mailinglist for something that is either
> the same problem or something similar.

> The problem is that nagios can send several commands into the pipe at
> once and the other end will only pick up one of them. So the RRD info is
> not written. The work around is not to allow Nagios to run things in
> parallel. But it will severly limit the amount of hosts and services one
> can check with Nagios.

> This should have been fixed by using the file interface instead of the
> named pipe. The file interface was introduced about a year ago or even
> longer back.

> Please check the mailinglist archives for more details.

> Hugo.

This seems to refer to nagiosgrapher, see:
http://www.nagiosexchange.org/cgi-bin/pages/Detailed/1659.html

whereas I'm trying to set up nagiosgraph, see:

http://www.nagiosexchange.org/cgi-bin/pages/Detailed/1501.html

Steve.


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