OsuRender APIReplay Rendering at Scale

A production-grade, distributed osu! replay rendering service powered by danser-go, Modal GPUs, and a battle-tested event-driven architecture.

GPU-Accelerated Rendering

Offload intensive danser-go rendering to Modal's T4/A10G GPU instances with automatic scaling and pay-per-second billing.

Transactional Outbox pattern ensures zero job loss. PostgreSQL LISTEN/NOTIFY with safety polling guarantees delivery.

HMAC webhook verification, zip bomb protection, advisory locks, rate limiting, input validation, and Cloudflare-only ingress.

Prometheus metrics, Grafana dashboards, structured JSON logging, correlation IDs, and SLO-based alerting out of the box.

Fully containerized with Docker Compose — PostgreSQL, Redis, MinIO, API, Dispatcher, Workers, Prometheus, and Grafana.

10+ chaos engineering tests proving crash recovery, duplicate dispatch prevention, stuck event sweeping, and queue circuit breaking.