Ingress NGINX Migration Guide (1 of 3): Measure Twice, Cut Once

Every migration story starts the same way: with a team staring at a production cluster, a long changelog of annotations, and a ConfigMap nobody has touched in three years. The gap between “we should migrate off Ingress NGINX” and “we know exactly what to do Monday morning” feels enormous. Opaque. Risky. Expensive.It isn’t.