Nagios and Oreon (Nagios web front end) installation
What is Nagios ?
Nagios® is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. It has been designed to run under the Linux operating system, but works fine under most *NIX variants as well. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.
What is oreon ?
Oreon© is an Open Source monitoring solution based on Nagios. It offers to this monitoring standard a new front end and brings it a panel of new functionalities.
Oreon Plugins
http://wiki.oreon-project.org/wakka.php?wiki=OreonPluginsEN
http://forum.oreon-project.org/viewforum.php?f=9
Nagios 1.2 and Oreon 1.2.2 installation on Debian
Preparation
Edit you /etc/apt/sources.list file enter any of the following two source list and save the file
deb ftp://ftp.proxad.net/mirrors/ftp.debian.org/ stable main
deb-src ftp://ftp.proxad.net/mirrors/ftp.debian.org/ stable main
deb ftp://ftp.fr.debian.org/debian/ stable main
deb-src ftp://ftp.fr.debian.org/debian/ stable main
deb ftp://debian.ens-cachan.fr/debian/ stable main
deb-src ftp://debian.ens-cachan.fr/debian/ stable main
If you modified this file, you must update the package list
# apt-get update
Put an IP address in /etc/network/interfaces
Put in the file /etc/hosts, the link between IP adress and Hostname.
Restart network service
# /etc/init.d/networking restart
Packages Need to Install
C Compilator and sudo installation
# apt-get install gcc make sudo g++
Web server installation : Apache 2
# apt-get install apache2
Mysql 4 database installation
# apt-get install mysql-server
PHP4 tool installation
# apt-get install php4 php4-gd php4-cgi php4-mysql libapache2-mod-php4
Nagios 1.2 installation
You can download compressor file on : http://www.oreon.org/dlNagios.php?lg=fr
Take last version (At the moment, the V0.3 of November 17, 2004).
Save it in /tmp
Uncompress it
# tar xzf install_nagios_by_oreon-v0.3.tar.gz
Now, you should have this directory :
/tmp/install_nagios_by_oreon-v0.3/
Edit this file install.sh
In section INSTALL / check for httpd directory , replace
/etc/apache2/conf by /etc/apache2
DIR_APACHE="/etc/apache2/conf" by DIR_APACHE="/etc/apache2"
Save and close the file
Execute installation ./install.sh, any questions asked
| QUESTION |
ANSWER TO PUT |
| install freetype |
yes |
| install jpeg |
yes |
| install png |
yes |
| install gd |
yes |
| install rrdtool |
yes |
install net-snmp
Version
System Contact
System Location |
yes
1
admin
lab |
| install nagios 1.2 |
yes |
| restart Apache |
yes |
| password nagiosadmin |
[put password] |
| start nagios server |
yes |
Once finished insallation, modify this file /etc/init.d/nagios
Search this lign su –l and delete l so have only su –
Check the Nagios home : /home/nagios/. If don't exist, creat it
# cd /home
# mkdir nagios
# chown nagios.nagios nagios
# chmod 775 nagios
OREON 1.2.2 installation
You can download compressor file on : http://www.oreon.org/dlOreon.php?lg=fr
Take last version (at the moment, the 1.2.2 of September 9, 2005).
Save it in /tmp
uncompress it
# tar xzf oreon-1.2.2.tar.gz
Now, you should have this directory
/tmp/oreon-1.2.2/
Execute installation ./install.sh, any questions asked
| QUESTION |
ANSWER TO PUT |
| Are you sure to continue |
y |
| Where is installed nagios |
[Just press Enter] |
| Where do I install Oreon |
[Just press Enter] |
| Where is sudo |
[Just press Enter] |
Last packages to install
nmap installation: Tool for auto-detect in Oreon
# apt-get install nmap
Oreon graphic tool installation
# apt-get install librrds-perl libgd-gd2-perl wget
Perl tool installation for a few plugins
# apt-get install libnet-snmp-perl
Final Steps
Delete oreon.conf file in apache2 directory
# rm /etc/apache2/conf.d/oreon.conf
Creat symbolic link between rrdtool directory.
# ln -s /usr/local/rrdtool-1.0.49/ /usr/local/rrdtool
So restart 3 services
# /etc/init.d/apache2 restart
# /etc/init.d/mysql restart
# /etc/init.d/nagios restart
Web interface Setup
Use web browser and go this URL : http://serverIPaddress/oreon/ First time, you finalize Oreon installation
This will open webinterface now you need to click on "start" button
If you don't have this page the FIRST TIME, entrer this URL: http://serverIPaddress/oreon/install/setup.php
Select I Accept and click on Next
Check environment configuration.
Click on Next
This step, all statuts must be on OK But there, we have a problem with PHP memory limit.
To correct this,edit this file:
# vi /etc/php4/apache2/php.ini
Replace this lign memory_limit = 8M by memory_limit = 16M
And
Un-comment this lign extension=mysql.so
Save and close this file
Restart apache2
# /etc/init.d/apache2 restart
Come back on web navigator and click on Recheck
Click on Next
In theory, there aren't root password for mysql
Give name for mysql database
Give it password
Precise server address : in theory, put localhost
Click on Next
Give Oreon administrator login
Give it password
Put Firstname
Lastname
Email
Language
Click on Next
If there aren't errors, click on Next, else come back to correct them.
So, your minimal installation and configuration is finished.
Click on interface or enter this URL: http://serverIPaddress/oreon/
If you see this red message in this page
Installation Directory is accessible. Delete this directory to prevent security problem
So you must delete install directory in Oreon
# rm -Rf /usr/local/oreon/install/
Re-fresh this page and the message must not be there.
You can log.
The first time, you must generate the plugin file.
Plugin generation
Click on Options on the top page and plugins on the left
Click on Generate
Nagios and runlevel
At this installation end, Nagios don't start with the computer. You must start manually this service.
If you want to start nagios with computer, you must execute this command
# cd /etc/init.d/
# update-rc.d nagios defaults
So, if you computer (re)start, Nagios service will be started.
