Category: Allgemein
KISS, DRY ‘n SOLID — Yet another Kubernetes System built with Ansible and observed with Metrics Server on arm64
This blog post shows how a plain Kubernetes cluster is automatically created and configured on three arm64 devices using an orchestration tool called Ansible. The main focus relies on Ansible; other components that set up and configure the cluster are Docker, Kubernetes, Helm, NGINX, Metrics Server and Kubernetes Dashboard. Individual steps are covered more or…
Event-driven Architectures
Next to the powerful Request / Response architecture exists another architecture, the event-driven one. How this architecture works, where the differences to Request / Response systems are and how transactions can be realized will be part of this article.
How to Scale Jitsi Meet
In today’s world, video conferencing is getting more and more important – be it for learning, business events or social interaction in general. Most people use one of the big players like Zoom or Microsoft Teams, which both have their share of privacy issues. However, there is an alternative approach: self-hosting open-source software like Jitsi…
How to Scale: Real-time Tweet Delivery Architecture at Twitter
There is a lot to say about Twitters infrastructure, storage and design decisions. Starting as a Ruby-on-Rails website Twitter has grown significantly over the years. With 145 million monetizable daily users (Q3 2019), 500 million tweets (2014) and almost 40 billion US dollar market capitalization (Q4 2020) Twitter is clearly high scale. The microblogging platform,…
Sensor Fusion
Geschrieben von Konstantin Rosenberg Einleitung Stell dir vor du fährst in deinem autonom Fahrenden Auto die Straße entlang. Plötzlich erscheint, hinter einem parkenden Auto, ein Fußgänger und tritt direkt vor dir auf die Fahrbahn. Du erschrickst, doch das Auto kommt elegant vor dem unachtsamen Spaziergänger zu stehen. Während du dir gerade nicht einmal sicher bist…
Industry 4.0 – Real time data visualization
As part of the lecture “System Engineering and Management”, we worked on a project in cooperation with IBM to visualize Industry 4.0 data in real time using a configuration-based approach. This project aims to avoid needing a web developer every time there is a modification in the data.
Energieversorgung als Ultra Large Scale System
Das Versorgernetz innerhalb von Deutschland ist mit dem europaweiten Stromnetz gekoppelt. Das europaweite Verbundnetz gilt als eine der größten Maschinen Europas und versorgt insgesamt rund 530 Millionen Menschen mit einer Stromfrequenz von 50 Hz. Die Energie, die dabei eingespeist wird, ist ein Technologiemix aus erneuerbaren Energiequellen und fossilen Brennstoffen. Derzeit besteht der Energiemix im Stromnetz zu…
Flutter Code Optimierung
Dieser Blogeintrag befasst sich mit Optimierungsmöglichkeiten des Flutter Frameworks. Innerhalb des Blogeintrag wird darauf eingegangen was Flutter ist, warum Applikationen optimiert werden sollen und die Vorgehensweise anhand von Beispielen erläutert. Was ist Flutter? Flutter ist ein Framework von Google, welches auf den Programmiersprachen Dart, C, C++ basiert und zur Entwicklung von Nativen Cross-Platform-Apps verwendet wird.…
Migrating from Heroku to Hetzner: Achieving Scalability with Docker, Kubernetes and Rancher
Dockerizing an existing application and deploying it in a Kubernetes Cluster via Rancher to achieve better scalability and cost minimization. Load Testing with Artillery, Monitoring with Prometheus & Grafana and GitHub Actions for CI/CD were used in the process.
Micro Frontends: Benefits of Webpack 5 Module Federation – A comparison
In this article I am going to have a look at the benefits of module federation in micro frontends with Webpack 5. We will be creating two similar micro frontend websites using two different approaches and compare the amount of resources that will be transferred over the network. Short overview of micro frontend approach: The…