Monitoring Storcli based Megaraid/LSI RAID controllers

What happens when there are broken disks and degraded RAID volumes and nobody knows about them? Monitoring disks and RAID volumes is a fundamental part of rolling out a monitoring solution. Unfortunately, manufactures for RAID controllers create their own tooling, which makes it difficult to monitor them using generic monitoring protocols. If you are familiar with [...]

By |2019-04-04T23:01:28+00:00October 4th, 2017|

Monitor your Synology NAS with SNMP

Network Attached Storage devices are very popular in small or medium offices or at home to store and share data. Synology is one of the manufactures who build their devices with SNMP support to provide monitoring and managment capabilities. This makes it very easy to let OpenNMS keep an eye on your NAS and it can tell [...]

By |2020-02-17T21:26:52+00:00September 13th, 2017|

Load Thresholding

System has high load! Sounds anything but perfect. At least when we are talking about servers. Fortunately, I don't have to explain what load is or how it's defined because there are many explanations on the internet. I found my favorite one on blog.scoutapp.com. Once you read the article, you know that the ideal load on a [...]

By |2019-04-04T23:01:28+00:00August 15th, 2017|

Introducing OpenNMS.js

Recently, we have been working on a project called "Helm" which will integrate a convenient OpenNMS alarm dashboard into Grafana. As part of that process, we have been developing a pure-JavaScript API for interacting with OpenNMS's ReST services called "OpenNMS.js". OpenNMS.js is primarily designed for developers, making it easy to write Node.js or browser tools for performing actions in [...]

By |2019-04-04T23:01:28+00:00August 7th, 2017|

What the…? SNMP Daemon spams my log!

As soon you provide more than a handful of services monitoring and centralized logging becomes essential. Especially when you run the Net-SNMP daemon with Docker you will notice your logs get spamed with some messages like Cannot statfs /run/docker/netns/...: Permission denied everytime you query for performance data. The Wiki article is a small guide how to configure the [...]

By |2019-04-04T23:01:28+00:00June 19th, 2017|

Monitoring Websites with Selenium

Now and then websites are really important for daily business and private life. You can nearly buy everything on websites, find information, meet friends, watch movies and much more. All the worse if your website is not working and you don't notice it or your customer first. But even if you already have some monitoring for [...]

By |2019-04-04T23:01:29+00:00June 12th, 2017|

Process Monitoring with SNMP

Monitoring processes that don't provide network services is a default use case in network monitoring. Because they aren't providing network services, black box testing won't work- you need an agent on your system providing an inside view of your operating system. The Net-SNMP agent is easy to install and configure on Linux or Unix. It's compatible [...]

By |2019-04-04T23:01:45+00:00May 9th, 2017|

Restart Detection

Most of today's servers run in virtual environments and Java applications in containers. Sometimes these applications or servers unexpectedly restart and can often go unnoticed because a restart can be much faster then a polling cycle. If SNMP is enabled, the hrSystemUptime can detect restarts from Windows or Linux machines. Similarly, this concept can also be [...]

By |2019-04-04T23:01:45+00:00May 4th, 2017|

Reboot & Update Monitor

Security updates are important and need to be installed regularly and as quick as possible. In Linux distributions like Ubuntu and Debian this is easily done with the apt package manager. Most of the security updates can be installed without rebooting your system. If you upgrade your Kernel it is required to restart your system and [...]

By |2019-04-04T23:01:45+00:00April 7th, 2017|

Automated Ordering

A self-sufficient printer environment OpenNMS usually stands for network and server monitoring. But like every good tool you can use (or misuse?!) OpenNMS in other scenarios as well. If that is a good solution, is completely your choice! :-) Imagine, you have a big printer environment, distributed in different locations and you don't want to order [...]

By |2019-04-04T23:01:45+00:00April 5th, 2017|
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