Dirk Wallerstorfer

Dirk is Technology Lead for OpenStack at Dynatrace. He is a technology enthusiast with vast knowledge in computer networking and software engineering, an intoxicating hands-on attitude, and the constant burning desire to be on the bleeding edge of technology. Besides that he almost never finds time for cycling.

Dirk Wallerstorfer's articles

OpenStack Summit Boston Recap

The OpenStack Summit at the Hynes convention center earlier this month was a blast. Exciting keynotes where we heard that we’re in the age of 2nd generation private clouds, where everything is virtualized and the focus shifts on the applications again. That enables the OpenStack community also to engage with other OpenSource projects like Kubernetes or Cloud Foundry. On the second day there was a live interview with Edward Snowden, who … read more

OpenStack network mystery: How 2 bytes cost me two days of trouble

Once upon a time, I set up an OpenStack cluster and experienced some strange connectivity problems with all my OpenStack instances. It was the perfect opportunity to learn more about OpenStack, perform a head-long deep dive into Neutron, and update my network troubleshooting skills. The preliminaries I set up my OpenStack cluster on 6 Dell OptiPlex 7040 machines, 1 router, 1 managed switch, and 1 unmanaged switch. True, this is not the usual … read more

OpenStack monitoring for enterprises

Dynatrace announces OpenStack support at Barcelona Summit OpenStack monitoring In today’s world, applications are the lifeblood of your business. When problems arise, reactive troubleshooting is no longer good enough. You can take control with 24/7 visibility into applications and cloud platform, even in the most demanding and dynamic environments. With OpenStack monitoring from Dynatrace, you get a single pane of glass that gives you deep insights into OpenStack and allows … read more

3 levels of network monitoring for DevOps

Network communications are a top priority for DevOps teams working in support of modern globally-distributed systems and microservices. But basic network interface statistics like received and sent traffic aren’t as useful as they once were because multiple microservices may share the same network interface. For meaningful analysis, you need to dig deeper and correlate network-traffic metrics with individual processes. This is however just the beginning … In this article, I’ll show … read more

Detecting network errors and their impact on services

Detecting errors like dropped packets or retransmissions on the network level is relatively easy. Figuring out if those errors affect the performance and connectivity of your services is however another matter. Some network errors are mitigated and compensated for by network protocols and active networking components, like network interfaces. Meanwhile, other network errors lead to performance problems that negatively affect your services. Following is an overview of common network errors … read more