Modern Approach to Kubernetes Traffic Management: Migrating from Ingress to GatewayAPI

This paper presents a comprehensive analysis of the migration from Kubernetes Ingress to the emerging Gateway API for traffic management in cloud-native environments. While Kubernetes Ingress has served as a foundational component for exposing services, its limitations in managing complex, multi-tenant, and highly dynamic microservices architectures have become increasingly apparent. The Kubernetes Gateway API, designed with a role-oriented, portable, expressive, and extensible model, offers a significant evolution by decoupling infrastructure and application concerns, providing richer routing capabilities, and enhancing role-based access control. This study details the motivations behind adopting the Gateway API, outlines a practical migration methodology, including architectural comparisons and the utility of tools like ingress2gateway, and discusses the challenges encountered. The observed improvements in operational clarity, routing flexibility, scalability, and security post-migration position the Gateway API as a future-forward standard for robust and maintainable Kubernetes traffic control