Assumptions

Listed below are assumptions of Nagios plugin for openQRM installation:

• Latest release of openQRM 3.1 is assumed to be already installed. Please check openQRM documentation to install openQRM.
• Ensure that the command #hostname -s returns a valid string on the openQRM server
• Each openQRM managed node has unique hostname   

Pre-requisites

Needs the packages listed below.

• Compile - libjpeg-devel, libjpeg, libpng-devel and libpng
• Runtime - compat-db(>=4.1) or db4 (>=4.1), libjpeg and libpng 
• Runtime for RPM-packages - GLIBC-2.4
• In order to view the “3D Status Map”, the browser needs VRML client. For information on VRML client installation, please refer to http://nagios.org/faqs/viewfaq.php?faq_id=53
  and
  http://nagios.org/faqs/viewfaq.php?faq_id=51&expand=false&showdesc=true

 Versions of software components

Listed below are versions of nagios compnents being used.

• Nagios - 2.5
• Nagios Plugin - 1.4.3
• NRPE - 2.5.2
• NSCA - 2.6
• GD - 2.0.33     

Distro's tested

• Fedora Core 4
• Fedora Core 5
• RHEL 3
• RHEL 4
• CentOS 4
• Mandriva Cooker

USAGE

Login to the openQRM GUI. 

Configure all VEs to monitor Nagios services by clicking Virtual Environments ->Individual VE ->Nagios Config

Default Nagios Config Screen

Nagios Config Screen when multiple NRPE images available

 Check the services that needs to be monitored and click “Save Selection”.

Repeat the above step for all the VEs.

Nagios plugin for openQRM installation and configuration is now complete.

Other Screens

Screenshot of openQRM after user login  

Screenshot with Nagios menu items expanded

Screenshot when user clicks Resource->Selected Node->Nagios Report

Nagios Report within openQRM

Nagios Report with local resource monitoring within openQRM

Events listing with nagios posted event

NRPE Image Creation for various DISTROS

By default, openQRM will have the NRPE image created for the distro it runs on. If you have nodes running a different distro than openQRM, you need to create NRPE image for this distro as per the steps outlined below.

• Download NRPE and Nagios plugins source from http://www.nagios.org
• Compile the binaries.
• Get the file openqrm.nagios.nodes.tar.tgz from openQRM found at :

<QRM_BASE_DIR>/qrm/plugins/nagios/unsecure

• Extract this tar file.
• Replace the binaries in "nodes/bin" and "nodes/libexec" with the compiled ones.
• Tar the "nodes" directory and name it as <distro>.nagios.nodes.tar.tgz. Replace <distro> with actual distro name like "FC5" or "CentOS5".
• Upload it to openQRM server at :

<QRM_BASE_DIR>/qrm/plugins/nagios/unsecure

Central Nagios Server

You can now view the status of exisiting Nagios server by configuring nagios server within openQRM as Central nagios server. To monitor the distributed servers from nagios server in openQRM:

• Add hosts definitions in distributedhosts directory using the template  hosts-distributed.cfg,  service definitions in distributedservices directory using the template services-distributed.cfg   and escalation definitions in hostescalations & serviceescalations directory. The base directory for configurations is :
  <QRM_BASE_DIR>/qrm/plugins/nagios/nagios-2.5/etc
• Restart the nagios plugin
  #<QRM_BASE_DIR>/qrm/sbin/qrm-plugin -u qrm -p qrm nagios stop
  #<QRM_BASE_DIR>/qrm/sbin/qrm-plugin -u qrm -p qrm nagios start

The existing Nagios server needs to be configured as distributed server. Refer to the section "Distributed Server Configuration" found at the web page: http://nagios.sourceforge.net/docs/1_0/distributed.html

Please submit comments or suggestions for this page here.

Comments (0)

Subscribe to this comment's feed