ndo2db grapher

Project Notes

Last version : v0.3.2 (2009/02/16)

Changelog:
* bugfix
* we are now able to select sub indicator when graphing (aka avg, min, max, crit and warn). So things are now simplier.
* disabling anti aliasing by default as Debian doesn't support it.
v0.3.1 (2009/01/28)

Changelog :
* bugfix in the javascript : now I'm using a class to handle pregenerated image.
* including directly the css directory so no more needed to download it.

This release only include bugfix if you are using pre-generated image (from v0.3).
v0.3 (2009/01/15)

Changelog :
* bugfix
* optimization by handling spited table for nagios_servicechecks (you need to split this table in multiple table named nagios_servicechecks_YYYYmmdd). This can achieve a huge difference if you have a big database. To give you an order, I got 14 Gb of data splitted into 150 tables to get 150 days of history. To do the job, you can try rotate_nagios_servicechecks.sh BUT BEWARE, USE IT AT YOUR OWN RISK !!! DO A BACKUP BEFORE LAUNCHING THIS SCRIPT AND MAKE TEST BEFORE USING IT ON A REAL PLATFORM !!!
* fix a bug (cannot store more than 255 bytes of performance data) by switching from VARCHAR255 to BLOB to store result (rotate_nagios_servicechecks.sh is handling this).
* handling of static generated graphic with generate_month_graphic.sh. This script generate png of previous day and store it in a cache directory.

You'll need to change you crontab in order to launch this script. Here's an example of what you can do :
# rotage nagios_servicechecks table. USE IT WITH CARE !!! YOU CAN LOSE YOUR DATA !!!
20 */2 * * * /path/to/nagios/scripts/rotate_nagios_servicechecks.sh> /path/to/nagios/log/rotate_servicechecks.log 2>&1
# generate static graphics
30 4 * * * /path/to/nagios/scripts/generate_month_graphic.sh> /path/to/nagios/log/generate.log 2>&1

v0.2.1 Changelog :

* generate only a graphic (using the option dump_graphic=1) to embed directly graphics in nagios web pages.
* generate cumulate area for CPU graphic
* force min and max value
* bugfix
v0.2 Changelog :

* cumulate indicators from various host
* bugfix.
v0.1

* multiple selection of various indicators
* multiple host selection
* average value


Actually, I'm only supporting MySQL backend but if someone need to support PostgreSQL, just send me an email :) (yannig_DOT_perre_AT_gmail_DOT_com)
Installation

ndoutils


First, you'll need a working ndo2db/ndoutils backend working with nagios. To install it, go fetch ndoutils here : http://sourceforge.net/project/showfiles.php?group_id=26589&package_id=173832

Compile it and install it against your version of nagios. Edit nagios config file by adding the following line :
...
# ndoutils broker
broker_module=/path/to/your/ndomodule/ndomod.o config_file=/path/to/your/ndomod/config/file/ndomod.cfg
...

Then edit your ndomod.cfg. Here's an example :

root@XXX # more ndomod.cfg
instance_name=default
#output_type=file
#output_type=tcpsocket
output_type=unixsocket

output=/path/to/your/nagios/var/ndo.sock
tcp_port=5668
output_buffer_items=50000
buffer_file=/path/to/your/nagios/var/ndomod.tmp
file_rotation_interval=14400
file_rotation_timeout=60
reconnect_interval=15
reconnect_warning_interval=15
data_processing_options=-1
config_output_options=0

Then edit you ndo2db.cfg. Here's an example :
Tune DB information

root@XXX # more ndo2db.cfg | egrep -v -e "^#" | egrep -v -e "^$"
ndo2db_user=patrol
ndo2db_group=produit
socket_type=unix
socket_name=/path/to/your/nagios/var/ndo.sock
tcp_port=5668
db_servertype=mysql
db_host=localhost
db_port=3306
db_name=nagios
db_prefix=nagios_
db_user=mysql_nagios_user
db_pass=mysql_nagios_passwd
max_timedevents_age=1440
# aka = 7 days
max_systemcommands_age=10080
# aka = 10 days
max_servicechecks_age=14400
# aka = 7 days
max_hostchecks_age=10080
max_eventhandlers_age=44640
debug_level=1
debug_verbosity=0
debug_file=/path/to/your/nagios/var/ndo.debug
max_debug_file_size=1000000

Warning ! You'll need to create an initial database containt by using mysql.sql script in db sub directory in the ndoutils package (v1.4b7).

Launch your ndo2db daemon :
/path/to/your/nagios/bin/ndo2db-3x -c /path/to/your/nagios/etc/ndo2db.cfg
Restart nagios daemon.

If you see something like this in the nagios log, then you've got a working version of ndo2db !

12xxxxxxxx ndomod: Successfully reconnected to data sink! 0 items lost, 236 queued items to flush.
12xxxxxxxx ndomod: Successfully flushed 236 queued items to data sink.
Install ndo2db grapher


Then you can try to use the ndo2db grapher. Untar ndo_graph.tar.gz then configure the mysql connection by editing nagios_graph_conf.inc.php:

$cache_directory = "/var/www/cache";
$db_host = "localhost";
$db_user = "root";
$db_pass = "";
$db_name = "nagios";

Warning : You will need the presence of jpgraph at the same level as the php pages (download it at this location : http://www.aditus.nu/jpgraph/).

Then edit the default generic-service to add the following elements:

define service {
name generic-service
...
notes Graph
notes_url /display_nagios_info.php?name1=$HOSTNAME$&name2=$SERVICEDESC$
...
}

Even better, (version major or equal to v0.2.1) you can embed directly a graphic in nagios pages (see screenshot) :

define service {
name generic-service
...
notes 
notes_url /display_nagios_info.php?name1=$HOSTNAME$&name2=$SERVICEDESC$
...
}

http://www.nagiosexchange.org/cgi-bin/jump.cgi?ID=1574&view=File9;d=1

You will see a nice icon in nagios which let you display nice graphics from the ndo2db backend.

Note for omegax and brn : Thanks for your report, I'll take a look at your advices.