Linux System Admins Blog

This guide will help you setup Nagios user to have limited access to host and service checks. It is helpful when you want to allow your customers or clients to view and receive alerts on their servers and services, like for dedicated servers.
Procedure:
Contacts: Create new contact definitions for your client.
[...]

[Read more →]

There is a module released for monitoring Drupal sites with Nagios.  Monitoring includes the check if your site is up and running, check for new updates on Drupal core, security, and modules, database updates, write permission on “files” directory,  check if cron is running on the specified period, and other sections of your Drupal site.  [...]

[Read more →]

We have a monitoring server running Nagios and we needed to add checks for Nginx process on a new server.  Basically, you only need to install NRPE to monitor services, processes, disk space, load, etc on your remote machine.  Check the NRPE docummention for complete reference and here’s a quick NRPE installation guide for Debian.
For [...]

[Read more →]

This is a slight departure from our regular programming. Instead of just concentrating on the sys admin side of things I want to show how to add a Nagios check to an existing application. In this case we have a Java application for which we want to monitor whether it is running or not. Later [...]

[Read more →]

If you can’t do it with a shell script it usually ain’t worth doin’, right? Of course the number and quality of monitoring tools available to sys admins has gone up dramatically. Thanks to Nagios and other great tools it’s pretty easy to keep track of what’s going on and where and get notified pretty [...]

[Read more →]

We have check_hparray plugin installed on all of our HP servers, running CentOS, for monitoring hardware raid via
HP Array Configuration Utility CLI (hpacucli) tool, and we have NRPE installed as well for this check from our remote Nagios server.
Yesterday we’ve setup another HP server and installed NRPE, check_hparray, and hpacucli, same process used on previous [...]

[Read more →]