How We Set Up One Private Container Registry for 6 AKS Clusters Across 3 Regions and What Broke Along the Way

When our team started expanding from a single AKS cluster in East US to clusters across West Europe and Southeast Asia, the first thing we assumed was that container image management would be the easy part. It wasn't. This post walks through how we architected a single private container registry accessible by all six of our AKS clusters across three Azure regions. I'll cover what worked, what silently failed for weeks before we noticed, and the decisions I'd make differently today. Th...