Blog¶

MkDocs CI Build Fails, Locally It Works: The Pygments 2.19 NoneType Trap

Everything was green for months. One new folder added, one push made — and CI started crashing with AttributeError: 'NoneType' object has no attribute 'replace'. Local builds: perfectly fine. GitHub Actions: dead.

This is the full root cause analysis and fix.

My Self-Hosted CI/CD Lab: Jenkins, SonarQube, and Nexus on Custom Domains with SSL

A four-node CI/CD lab — each service on its own server, its own subdomain, its own SSL cert — reproduced from a single command. No public IP. No manual setup.

How I Debugged a Kubernetes DNS Failure

One-line summary of what this post solves.