How I do testing of RxJs4 and RxJs5 code
This blogpost documents my search for a solution of a way to keep testing in RxJs5 simple.…
Building your own horizontal pod autoscaler for Kubernetes
The current version of Kubernetes (1.3) is quite packed with features to have your containerized application run smoothly in production. Some features are still a bit minimal viable product like the scaling options of the horizontal pod autoscaler (HPA). Currently you are only able to scale based on CPU…
Kubernetes ReadinessProbe should be mandatory
For my current customer i'm in the process of migrating their application from Google App Engine Flexible (former Managed VMs) toward Kubernetes running on GKE. During extensive tests I concluded that although pod readinessProbes are optional, they should in fact be mandatory when having a Service connected. What is a…
Speaking at NDC Oslo 2015
This year I got the change to give a talk at the NDC Oslo 2015 about using StatsD to measure your application's performance. Giving a really long talk to a big crowd of non-native dutch attendee's was quite the feat! I had a load of fun and learned a ton.…
Getting StatsD up and running on Ubuntu 14.04 in 10 minutes
Even though that sending metrics to StatsD is really easy the installation of the StatsD stack on a webserver is historically non-trivial. Because the components are now available as apt-get packages and all guides that I found are long, incomplete or contain user intervention I have scripted an unattended install…
Azure Webjobs to the rescue
I gave a talk at Q42 about the power that Azure Webjobs give you for running async tasks, long running or scheduled. The slides are meant to give a fast walkthrough of the featureset and some pitfalls. What are webjobs? Webjobs are part of the Azure Cloud solution of microsoft.…
Mitigating a Pushdo DDoS attack on your azure website
Recently one of my clients websites was under a DDOS attack and this resulted in a less-then-desirable site performance. In this blog post I will elaborate which precautions we did to make certain our site will be performing as requested (and not scaling to 10 instances costing us lots of…
Securing your Elasticsearch with basic authorization
lets put the breaks on we are going to export this bad boy…