In about three weeks DevoxxUS will take place in San Jose, California on March 21-23. After having visited Devoxx Belgium six
consecutive times this will be my first Devoxx conference outside of Europe. Once again I am honored
to be a speaker at that conference! After my Devoxx BE talk in 2015 (Testing Microservices with a Citrus twist) this is my second time speaking
in front of Devoxxians from all around the world. Fantastic!
Version 6.0 von check_nwc_health ist erschienen und hat neben Aufräumarbeiten unter der Haube ein paar neue Features zu bieten:
SNMP-Traps und Nagios ist eins der Themen, um das man bislang gerne einen großen Bogen gemacht hat. Grundsätzlich gibt es seit etlichen Jahren die AddOns SNMPTT und Nagtrap, deren Konfiguration aber ein wenig mühsam ist. In einem Projekt, bei dem es um die Überwachung von mehreren Tausend Storage-Systemen ging, entstand eine Methode, welche ressourcenschonend und einfach automatisierbar ist.
Im ersten Teil dieses Artikels geht es um die entsprechende Vorbereitung eines OMD-Servers. Genauer gesagt darum, wie man dafür sorgt, daß ein eingehender Trap gleichzeitig an mehrere OMD-Sites (Test, Produktion, …) zugestellt wird.
Have you ever wondered what kind of patterns
.gitignore allows? Was it
*target*?? Read on and find out!
Many Nagios folks use PNP4nagios to store performance data and draw graphs.
Nowadays time series databases like Influxdb are quite trendy and have their own pros and cons. But In the end
they visualize the stored metrics with Grafana which comes with a plugable
datasource api, so wouldn’t it be nice to use the already collected RRD data in Grafana as well? This
combines the speed of rrd with the more modern graphs from Grafana.
So, 2017 has arrived - this is the year when Java 9 will finally be released. And with it, the brand new module system called Jigsaw. In January, Marc Reinhold has announced that JDK 9 is feature complete, so we have every reason to be optimistic that the final release will actually ready in July. So it is about time to get acquainted with project Jigsaw, also known as Java 9 modules.
Getting started with Kubernetes can be intimidating at first. Installing Kubernetes is not the easiest of tasks and can get quite frustrating.1 Luckily, there is an out-of-the box distribution called Minikube which makes toying around with Kubernetes a bliss.
The probably best written tests are those which can be understood by anyone understanding some English, right?
Hamcrest is an anagram of the word “Matchers” and a paradigm of encapsulating matching logic and corresponding error messages in objects we could use and reuse in the tests. They hide “matching”-implementation details and get self explanatory names we can seamless integrate in our tests. And of course we are also able to write tests for our matchers!
Hamcrest itself isn’t only intended to be used in the context of tests. It’s available for: Java, Python, Ruby, Objective-C, PHP, Erlang, Swift.
Abstract: As part of a log file monitoring tool, I implemented a file tailer that keeps reading new lines from log files. This turned out to be much more challenging than I thought, especially because it should run on multiple operating systems and it should be robust against logrotate. In this 20 Minutes talk I will present the lessons learned, the pitfalls and dead-ends I ran into.
Undertow is an open-source lightweight, flexible and performant Java server, they say. I can confirm that it’s
- lightweight: just have a look at those few lines of code to start a server and 1MB core JAR
- flexible: always feel free to provide your own implementations or use Undertow helpers to delegate usual server glue code to a more specific implementation you provide
I didn’t check or compare performance. It is the default server implementation of Wildfly Application Server and sponsored by JBoss.