Meet Jake Omann – one of our top notch developers here at Nagios Enterprises. Jake is a key developer of many of our commercial-grade Nagios solutions, including Nagios XI, Nagios Network Analyzer, and Nagios Fusion. His ability to patch bugs and crank out new cool features is nearly unrivaled! Learn more about Jake, his role at Nagios, and plans for future projects in this week’s “Meet Our Team Interview.”
When active agent-based monitoring is not an option (because of a firewall, or security restriction), passive monitoring can provide the solution necessary to maintain network security and health. Today we will be discussing Nagios Remote Data Sender (NRDS) and how it can monitor Linux machines using passive check results. Passive results are sent to the Nagios Remote Data Processor (NRDP) server and processed in Nagios XI.
The NRDS client configuration can be managed centrally via the NRDS Config Manager Component in Nagios XI. Updated configuration files on the NRDS server are automatically picked up by all clients. The NRDS client runs on a cron job at a specified interval. Each time it runs, it will do the following:
In this article, I will show you how you can start monitoring a Linux host passively in three easy steps.
Go to Admin -> Monitoring Config -> NRDS Config Manager, click on Create Config, and select Linux from the Operating System drop-down menu.
Continue reading ‘How to Passively Monitor Linux Machines with NRDS & Nagios XI’
We’re proud to have a great team of individuals at our company and wanted to introduce you to a few of them. First up, meet Nick Scott – one of the developer extraordinaires at Nagios. Nick is the creator of the NSTI and NCPA addons for Nagios and is a key developer of Nagios XI and Nagios Network Analyzer.
Last week we discussed monitoring a Windows machine with NCPA and Nagios XI to make sure that the server was functioning properly. In order to showcase the cross-platform capabilities of NCPA (Nagios Cross-Platform Agent) we decided it would be a good idea to show how to monitor a Linux machine as well. In this article I will show you how easy it is to monitor a Linux box using the same exact agent that we used to monitor the Windows box last week. Here’s how you do it.
1. Installing and configuring NCPA on the remote box
Instructions on installing NCPA can be found here: NCPA Installations Instructions. For more info on acquiring the correct RPM packages for your Linux distro, please check our documentation here: Finding the Right RPM
Run the following commands from the command line as root:
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cd /tmp wget http://assets.nagios.com/downloads/<your rpm package>.rpm rpm -ivh --nomd5 <your rpm package>.rpm |
Note: For my example, I used CentOS 6.5, 64-bit, so I ran:
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cd /tmp wget http://assets.nagios.com/downloads/ncpa/ncpa-head.el6.x86_64.rpm rpm -ivh --nomd5 ncpa-head.el6.x86_64.rpm |
Next, you will have to edit the “community_string” in the NCPA config file. The “community_string” is the token that you will use to log into the agent and also allows the Nagios XI server to communicate with the NCPA agent. This process is comparable to entering a token in the GUI installer when monitoring a Windows machine. Continue reading ‘Monitoring a Linux Machine with Nagios XI & NCPA’
