Transitioning from Monolith to Microservices: Service Mesh, Kubernetes, and Architectural Strategies

The talk, presented by Marco Palladino, CTO of Kong, introduces the challenges of moving from a monolithic architecture to a microservice‑based system and why a service mesh is essential for this transition. It emphasizes that the shift must be driven by business goals, not technology hype, and outlines three migration strategies: the "ice‑cream" approach (gradual extraction), the "Lego" approach (partial refactoring), and the "nuclear" approach (complete rebuild).

Key technical concepts are covered, including the role of Service Mesh as a design pattern that uses sidecar data planes to handle network communication, latency, security (mutual TLS), and observability without modifying the services themselves. The distinction between Data Plane and Control Plane is explained, with the Control Plane managing configuration and metrics for all sidecars.

Kubernetes is described as the platform that deploys pods and sidecar containers, ensuring that each service instance communicates locally with its proxy, reducing latency and resource consumption. The importance of lightweight sidecars, health checks, and circuit breakers for resilient microservices is highlighted.

The article also discusses event‑driven architecture as an alternative to direct service‑to‑service calls, using a message broker (e.g., Kafka) to propagate state changes reliably and reduce coupling. It stresses the need for a single, reliable event infrastructure to simplify system design.

Finally, Kong’s contributions are presented: providing an open‑source control plane and data plane that enable organizations to manage hybrid environments, connect legacy monoliths with new microservices, and implement service mesh capabilities across clouds and on‑premises. A Q&A section addresses concerns about latency, migration paths, and the feasibility of full rewrites versus incremental migration.