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Open Source

Articles, podcasts, talks, and more about Open Source.
Blog Post

Nebu: Self-made sovereignty

There are plenty of open-source alternatives to Slack. None of them deliver real sovereignty. Community editions are deliberately pared down so no company can run them in production, while enterprise features sit behind commercial licenses. This article shows why “building it yourself” is no longer a utopian idea today, but a realistic option for anyone with a product vision and a bit of DIY courage.

Blog Post

AI Features for Jira Data Center – No Atlassian Cloud Required

Imagine this: after every customer meeting, structured Jira issues are created automatically. You just paste your notes into an AI, and it does the rest. Atlassian already offers that kind of magic in Jira Cloud: natural-language search, automatic summaries, and issue creation from unstructured text. But not everyone wants to move to the cloud, and many teams plan to keep using Jira Data Center through 2029. In this article, we show how to get many of the same benefits on-premises with Jira Server and your own AI stack: GDPR-compliant, resilient to Cloud Act exposure, and without data leaving your environment.

Podcast

EU-Data Act für Digitale Dienste

Was Anbieter und Konsumenten jetzt vorbereiten müssen

Anja Kammer
Daniel Bornkessel
Blog Post

Updating OWASP’s Microservice Security Cheat Sheet: Practical Considerations & Recommendations

Turning principles and patterns into practice — just as promised.

Article

Kubernetes sicher und transparent – Erste Schritte mit Cilium

Cilium bringt Observability-, Security- und Netzwerkfeatures für Kubernetes – dank eBPF ganz ohne den eigentlichen Anwendungscode zu ändern. In dieser Artikelreihe lernen wir, wie wir ein lokales Cilium-Setup aufsetzen, wie Cilium funktioniert und in weiteren Teilen auch, eigene Netzwerkregeln durchzusetzen und sie in Echtzeit zu überwachen. Starte deinen lokalen Cluster und werde zum Kubernetes-Jedi-Meister - oder folge der dunklen Seite der Macht.

Article

Kubernetes sicher und transparent – Erste Schritte mit Cilium

Teil 2: Zerstört den Todesstern!

Blog Post

Datensouveränität unterwegs: OpenWebUI trifft Ollama im VPN

In diesem Beitrag zeige ich, wie ich LLMs mit Ollama auf einem mobilen MacBook betreibe – und dank VPN und OpenWebUI von überall darauf zugreifen kann. Sicher, und selbst gehostet. Schritt für Schritt zum persönlichen KI-Setup – performant, privat und unterwegs verfügbar.

Article

Beyond the hype: An engineer’s journey into ReBAC and AI with the Model Context Protocol

In this article, I share my experiences on my journey into the AI world. During this journey, we’ll build our own Model Context Protocol (MCP) Server using C Sharp, learn about access management with relationship based access control (ReBAC) on the way, and in the end I’ll provide my thoughts on the current state of AI and MCP, focusing on security and UX.

Blog Post

Verschachtelte Tests mit Minitest

Ein paar Zeilen Ruby-Code für übersichtlichere Test-Szenarien

Podcast

Heimdalls Bewerbung bei der CNCF

Vom Feierabendprojekt zum weltweit genutzten Tool

Anja Kammer
Dimitrij Drus
Podcast

Data Contracts

API Spezifikationen, aber für Datensätze

Sven Johann
Dr. Simon Harrer
Article

Nicht mehr Open-Source

Technologieentscheidungen rational treffen

Podcast

Backstage

Erhöhte Development Experience

Tammo van Lessen
Sven Johann
Security Podcast

Die XZ/OpenSSH Backdoor

Zerbrechliche Strukturen in Open-Source-Projekten

Stefan Bodewig
Christoph Iserlohn
Blog Post

A natural language calculator

powered by a local LLM and node.js

Blog Post

Clientseitige Speichertechnologien im Browser

Ein kurzer Überblick über diverse Technologien zur clientseitigen Speicherung von Daten und Zustand im Browser

Blog Post

Running an AI Chatbot on Your Own PC

Llama.cpp, gpt4all and others make it very easy to try out large language models. Here’s a short guide to trying them out under Linux or macOS.

Article

Babylon as a Feature

Multi-lingual documentation, made simple

Article

Creating data products with Terraform on AWS

Have you heard of data mesh? Are you intrigued by its potential but uncertain how to get started building data mesh and data products? If so, this article outlines a potential approach and delves into the key concepts behind it!

Article

Round-robin coding

Remote mob programming typically means one person takes on the role of typist at the screen with an open IDE, more or less typing what the others tell them to. To ensure that everyone stays on top of the work, the role of typist is frequently changed up and the current state of the code is handed over to the new typist. Our simple CLI tool called mob enables such a handover in just a few seconds by bundling the necessary Git operations into concise commands.

News

Dimitrij presents Heimdall at the CNCF TAG Network Meeting
News

Weihnachtsaktion für Open-Source-Projekte: Gerrit Beine verschenkt drei Softwarearchitektur-Gutachten