# ./configure; make all; make install
Note: for background information concerning buffer sizes, different transports and the multiline feature, please read also this blog article.
Please increase your buffer limits (MAX_PLUGIN_OUTPUT_LENGTH und MAX_INPUT_BUFFER).
It's no problem to increase both and compile a fresh nagios version (3.0a4 and above) following Ethans comment from the Nagios 3.x documentation:
Plugin Output Length Restrictions Nagios will only read the first 4 KB of data that a plugin returns. This is done in order to prevent runaway plugins from dumping megs or gigs of data back to Nagios. This 4 KB output limit is fairly easy to change if you need. Simply edit the value of the MAX_PLUGIN_OUTPUT_LENGTH definition in the include/nagios.h.in file of the source code distribution and recompile Nagios. There's nothing else you need to change!
check_multi is just a normal plugin and can be called via NRPE like all other plugins.
One remark: you might have to change the buffer sizes in common.h MAX_INPUT_BUFFER and MAX_PACKETBUFFER_LENGTH.
For the guys with old NRPE releases (before May 8th 2007) out there: for multiline output NRPE v2.8 or higher is required.
Caveat: the PIPE buffer handling has been changed with the linux kernel 2.6.11. Before this kernel release linux kernels were only capable to transport 4096 bytes!
And: have a look onto Ton Voons blog at the opsera site: he provides a patch which allows NRPE to read subsequent blocks one after another. The charm in this solution lies in the fact, that you don't have to upgrade all NRPE daemons in the field at once.
Since July 1st 2009 ndomod.c supports long plugin output - please run a decent version of ndoutils.
NDO is not multiline capable at the moment, since the NEB module ndomod only passes the field output but not long_output to ndo2db.
This small patch solves the problem.
The buffersize for ndomod is defined by NDOMOD_MAX_BUFLEN in ndomod.h and the default value is 4096. If your check_multi output is longer that 4K, please change this value and recompile NDO.
The check_multi installation is now autoconf based, which means you have to use
configure to define your settings and gather system information.
tar xpzf check_multi_[...].tar.gz
nagios@thinkpad:~/check_multi-SVN280> ls -l total 180 -rw-r--r-- 1 nagios nagios 9374 2009-10-22 21:49 Changelog -rw-r--r-- 1 nagios nagios 17987 2009-10-22 21:49 LICENSE -rw-r--r-- 1 nagios nagios 2859 2009-10-22 21:49 Makefile.in -rw-r--r-- 1 nagios nagios 993 2009-10-22 21:49 README -rw-r--r-- 1 nagios nagios 290 2009-10-22 21:49 THANKS -rwxr-xr-x 1 nagios nagios 102048 2009-10-22 21:49 configure -rw-r--r-- 1 nagios nagios 13061 2009-10-22 21:49 configure.ac drwxr-sr-x 5 nagios nagios 4096 2009-10-23 23:14 contrib drwxr-sr-x 4 nagios nagios 4096 2009-10-23 23:14 plugins drwxr-sr-x 9 nagios nagios 4096 2009-10-23 23:14 sample_config -rw-r--r-- 1 nagios nagios 3081 2009-10-22 21:49 subst.in
check_multi itself resides in the plugins directory:
nagios@thinkpad:~/check_multi-SVN280> ls -l plugins total 108 -rw-r--r-- 1 nagios nagios 478 2009-10-22 21:49 Makefile.in -rwxr-xr-x 1 nagios nagios 95037 2009-10-22 22:07 check_multi.in drwxr-sr-x 3 nagios nagios 4096 2009-10-23 23:14 t
.infiles. These files will be converted during the installation.
- -prefix. It determines the 'root' directory of your check_multi installation.
/usr/local/nagiosyou don't need any option.
./configure [--option1=value1 ...]
Look for errors and correct them.
to create scripts and config files.
If these tests succeeded, you are ready for install. If not, it's most likely a configure problem. If you're sure that it's not having to do with configure issues, send me a mail with the output of the test.
This places the plugin under
or for some contributions like a HTML aware notification script or a custom Nagios query CGI, run
An upgrade is just a new installation of your plugin with the same configure settings.
Note: If you want do not recall your configure settings, just run
$ check_multi -V check_multi: v$Revision: 289 $ $Date: 2009-10-31 13:56:01 +0100 (Sat, 31 Oct 2009) $ $Author: flackem $ configure '--prefix=/var/opt/nagios' '--with-config_dir=/etc/opt/nagios/check_multi'
As you see, this provides information for the version of check_multi and the configure command line. No need to save config.log after installation.