DevOps

🎁 All 4 Free DevOps Lead Magnets - Download the complete collection: Career Roadmap, Linux Cheat Sheet, Infrastructure Checklist, and Certification Study Plan. Get All Free Resources →

🚀 The Complete DevOps Learning Path

Start your DevOps journey with the 4-part series designed to take you from beginner to production-ready engineer — career path, fundamentals, production infrastructure, and certification strategy. Every article below is also listed in the topic clusters further down, so the clusters are the canonical contents list.

🎯 Start Here: Career Path

Your roadmap from absolute beginner to production DevOps professional — 5 phases, certification milestones, and production stack recommendations.

🔹 📥 Free Download: DevOps Career Roadmap PDF →

💡 Why It Matters: Fundamentals

AI generates code, but understanding matters more. Linux fundamentals are the foundation for every modern DevOps and AI workload.

🔹 📥 Free Download: Linux Command Cheat Sheet →

🏗️ Deploy: Production Infrastructure

Build a complete production infrastructure with open-source tools — all components work together in a cohesive architecture, from PostgreSQL and Redis to MinIO, n8n, and observability.

🔹 📥 Free Download: Infrastructure Deployment Checklist →

🔹 💰 Save 25%: Complete DevOps Bundle - All 5 Stacks →

🎓 Validate: Certifications

Compare LPI DevOps Tools Engineer, CKAD, CKA, Terraform Associate, and AWS DevOps Engineer to find the right certification path for your career.

🔹 📥 Free Download: DevOps Certification Study Plan →

🔹 💰 Save 15%: LPI + DevOps Practice Bundle →

Production-tested guides on containerization, orchestration, observability, security, and infrastructure automation — built from real deployments.

💰 Popular Bundles

| Bundle | What's Included | Price | Savings | | ------------------------------------------- | ----------------------------------- | ------------ | ---------------- | | DevOps Bundle → | 5 production stacks + cheatsheets | €39.99 | Save €9.95 (20%) | | | Practice subscription + cheatsheets | €11.99/month | Save €1.99 (15%) |

DevOps

🚀 The Complete DevOps Learning Path

🎯 Start Here: Career Path

💡 Why It Matters: Fundamentals

🏗️ Deploy: Production Infrastructure

🎓 Validate: Certifications

💰 Popular Bundles

Kubernetes & Containers

The Nix Adoption Ladder: Six Levels of Reproducible Infrastructure

Nix: From Zero to Hero — A Hands-On Path to Reproducible Everything

VM/Container/Pod Resource Tuning: A Comprehensive Production Guide

Flux 2.8 and Helm v4: The GitOps Upgrade Guide

Edge Computing Patterns with k3s: Multi-Cluster Management, Offline-First Deployments, and Observability at Scale

Container-Orchestrierung: Docker, Kubernetes und die Zukunft

Security & Hardening

Stripe Testing Best Practices: From Test Cards to Production Confidence

Stripe-Testing-Best-Practices: Von Testkarten zu Produktionsvertrauen

AI-Assisted Vulnerability Research: When Offense Meets Automation

AI Model Supply Chain Security: The LiteLLM Incident and What It Reveals

Kubernetes Security Tooling: Data-Driven Guide to the Open-Source Ecosystem in 2026

Graph-Powered OSINT: From Data to Investigation with Agentic AI

Monitoring & Observability

The Open-Source Infrastructure Stack: Production-Grade PostgreSQL, Redis, MinIO, n8n, and Observability

Incident Response and SRE Practices for Production Systems

DevOps in the Age of AI

Grafana for Infrastructure Observability: Dashboards, Alerting and Data Sources

Nagios Production Monitoring: Setup, Configuration and Best Practices

Building a Production Observability Stack with Grafana, Prometheus, Loki, and Alloy

Storage & Databases

k3s Disaster Recovery Testing and Edge Patterns

k3s Disaster-Recovery-Testing und Edge-Patterns

CephFS: From Zero to Hero — The Distributed Filesystem, End to End

SeaweedFS: Deep Dive!

Ceph Deep Dive: RADOS, BlueStore, CRUSH, and Running a Sovereign Storage Cluster

Disaster Recovery for Self-Hosted Infrastructure

Networking

NetworkPolicy Enforcement Deep Dive: eBPF (Cilium) vs iptables (Calico)

K3s Distributions Compared: Flannel, Calico, Cilium — CNI Performance and NetworkPolicy Reality

SCS OSISM Deployment Networking: VIPs, Network Separation, and Multi-Node Architecture

IPv6 Crosses 50%: The 28-Year Milestone

Kubernetes 1.36: Ingress-NGINX Is Dead, Migrate to Gateway API

Cloud, Edge & Digital Sovereignty

OSISM: The Open Source Infrastructure Manager for Sovereign Clouds

npm v12 Breaking Changes: What Every JavaScript Developer Needs to Know

Sovereign Cloud Stack (SCS): Cloud in a Box Installation and Deployment Guide

MS365 Exit Strategies: Why Digital Sovereignty Starts with Implementation

Codeberg and Forgejo Actions: A Complete Guide for Self-Hosted CI/CD

World-Office: How a Rust Rewrite Fixes Euro-Office's Inherent Problems

CI/CD & Automation

Software Testing That Earns Its Keep: A Field Report from Three Codebases

Software-Testing, das sich bezahlt macht: Ein Feldbericht aus drei Codebasen

FinOps in the CI: Cost Guardrails at Provisioning Time

Platform Engineering with Backstage: Building Internal Developer Portals

Running n8n in Production: Docker Compose, Queue Mode, and Postgres Backend

Kubernetes GitOps with ArgoCD: A Practical Guide

AI Operations

Agent Observability with OpenTelemetry: Tracing LLM Calls and Agent Loops in Production

Loop Engineering: From Prompts to Durable Agent Loops

n8n vs. Dify: Automation Platform vs. LLM App Builder — A Practical Comparison

Self-Hosted AI Stack: Ollama, Open WebUI, and LiteLLM in Production

Email & Collaboration

SOGo 6 Evaluation: A Technical Deep Dive

Ein Self-Hosted-Groupware-Stack aufbauen: SOGo 6, Stalwart und OpenLDAP in Docker

Building a Self-Hosted Groupware Stack: SOGo 6, Stalwart, and OpenLDAP in Docker

Stalwart vs Dovecot 2.4 CE: A Head-to-Head Mail Server Evaluation on Kubernetes

Career & Certification

DevOps Certifications in 2026: Which Ones Actually Matter for Your Career?

Linux, DevOps, and AI: Why Fundamentals Matter More Than Ever in 2026

Zero to DevOps in 2026: The Complete Career Path from Linux to AI Infrastructure

Agile, Wu Wei, and the Art of Effortless DevOps

More DevOps

Memory-Safe Firmware: Googles Rust-Strategie im Pixel Baseband

Vision Pro CloudXR: Hybrid Rendering Arrives for Spatial Computing

🎁 Free Resources