DoorDash dives into its traffic platform evolution—moving to a service mesh handling 80M+ peak RPS. Learn why, how we migrated 1K+ services, and lessons learned.

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DoorDash migrated over 1,000 microservices to a service mesh architecture handling 80M+ requests per second during peak hours. The migration was prompted by a major 2021 outage and challenges with inconsistent service-to-service communication patterns. They chose Envoy as the data plane with a custom control plane, starting with critical reliability features like load shedding and circuit breakers. The journey involved numerous technical challenges including HTTP/1.1 race conditions, gRPC load balancing issues, and configuration management complexities. Key lessons include the importance of automation, developer education, and expecting unexpected edge cases when introducing proxy layers at scale.

Inside DoorDash’s Service Mesh Journey: Part 1 — Migration at Scale