How to: Setup Nagios Center : NagCen
In the world of open source, when it comes to monitoring, Nagios is the most preferred choice. But managing multiple Nagios screens can be a daunting task. while looking for a simple solution i came across NagCen.
NagiosCenter is a centralized viewer to show data of several (more than one) Nagios server spreaded in different networks. It uses therefore a parser in python and also an PHP Mysql Web-fronted.
Requirements:
- NagCen – Download from here http://sourceforge.net/projects/nagcen/
- Php
- Python
- Mysql
- Working Nagios Server.
- Password-less setup between your Nagios Servers and Nagios Center (NagCen Server)
- HTTP (Apache) Server
Step 1. Create a database in mysql and assign a username and password to it.
# mysql mysql> create database nagioscenter; mysql> grant all privileges on nagioscenter.* to ''@'%' identified by "password";
Step 2. Create a directory and untar the downloaded NagiosCenter package in it.
# mkdir /nagioscenter # cd /nagioscenter # tar -xvzf NagCen.tar.gz
Step 3. Edit the default nagcen.conf file.
# cd /nagioscenter/daemon # vi nagcen.conf id=5 host=localhost #### Host where database is residing db_user=#### name os database user db_pass=#### password db=nagioscenter #### database name statusfile=/nagioscenter/dat-files/hostname/status.dat #### Location of status file
Step 4. Setup password-less SSH between your Nagios servers and Nagios Center Server.
Please refer to this tutorial for the same Password-Less SSH Login
Step 5. Create a script, to fetch the “status.dat” file and then run the parser on it.
# vi /nagioscenter/scripts/script.sh #!/bin/bash #### This will fetch the status.dat file from the remote host scp [email protected]:/usr/local/nagios/var/status.dat /nagioscenter/dat-files/hostname/status.dat #### Run the python parser /usr/bin/python /nagioscenter/daemon/nagcen_p.py -c /nagioscenter/daemon/nagcen.conf
Step 6. Make the script executable and put it in cron.
# chmod +x script.sh # crontab -e */5 * * * * /bin/bash /nagioscenter/scripts/script.sh
Step 7. Copy “web-gui” directory into HTTP(Apache) Server’s path.
# cp -R /nagioscenter/web-gui /var/www/html
Step 8. Open following path in your browser
http://hostname/web-gui/nagcen