From Ingress-NGINX to Gateway API: The Migration Everyone Underestimated

Short summary

Ingress-NGINX's March 2026 retirement forced teams to migrate to Gateway API, but the two have fundamentally different architectures—Ingress merged routing, TLS, and policies into single resources, while Gateway API separates infrastructure operator and developer concerns. The shift exposed organizational gaps: teams unprepared for governance questions and ownership boundaries.

• •Ingress-NGINX retirement triggered unplanned migrations across ~50% of production Kubernetes clusters globally
• •Gateway API's decoupled ownership model (infra operators vs. developers) clashes with how teams operated Ingress-NGINX
• •Migration exposed organizational debt: teams lack governance frameworks, ownership boundaries, and clear security policies

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