Testing plays a crucial role in software development and we strive to test as much as possible using isolated unittests. However, there are times when these unittests fail to capture issues that arise when the entire application is tested. Such issues may include discrepancies between front-end and back-end implementation of APIs, or differences in behavior between real and mocked databases. These problems can be easily identified by running a series of scenarios that test the entire application, including the front-end, back-end, and database. Many developers resort to manual testing to achie…
With the release of .NET 6 also came the option to use source generation in System.Text.Json. In short this means that instead of runtime reflection some of the work is now done compile time. This makes it more efficient. But how much? And should I care? Just measure it. I made a small project that you can use and adjust to measure the difference for your specific case. Let the results help you decide what's best for your application. Benchmarking codeThe code can be found here: netwatwezoeken/jsonbenchmark (github.com). It uses BenchmarkDotNet for measurements and Bogus to generate fake data.…
Jenkins and kubernetes are a great combination. I love the concept of leveraing container technology to provide any build tools that you might require. However in many cases the examples provided are not always the best or most secure. In Section 10.2.2 Building your image of Mannings Microservices in Action the following Jenkins Pipeline script is suggested: def withPod(body) { podTemplate(label: 'pod', serviceAccount: 'jenkins', containers: [ containerTemplate(name: 'docker', image: 'docker', command: 'cat', ttyEnabled: true), containerTemplate(name: 'kubectl', image: 'morga…
This artice describes how you can create a kubernetes custer using Vagrant, Hyper-V and Packer. Update (11-05-2020)I have updated the scripts to use contianerd in favor of docker. Don't worry using docker is still possible. In /packer/ubuntu-18.04-amd64.json replace containerd.sh woth docker.sh. Why? I found myself in the need of having a kubernetes test cluster. Instead of using minikube or enabling Kubernetes on Docker Desktop. I thought I could learn from setting up a cluster from scratch. This also allows me to easiliy simulate network failures or have nodes go down. Prerequisites Hyper-V…
The goal is to have networking with static ip addresses for virtual machines on Hyper-V. The machine must also be able to access the internet. The easiest way is to start a Powershell session with elevated rights. Then use the follwing three commands. Feel free to change any names and ip address ranges. Create a new switch New-VMSwitch -SwitchName "NAT Switch 192.168.40.x" -SwitchType Internal Assign and IP address New-NetIPAddress -IPAddress 192.168.40.1 -PrefixLength 24 -InterfaceAlias "vEthernet (NAT Switch 192.168.40.x)" Enable NAT New-NetNAT -Name "NATNetwork&qu…
