Centrifugo is an open-source scalable real-time messaging server. Centrifugo can instantly deliver messages to application online users connected over supported transports (WebSocket, HTTP-streaming, Server-Sent Events (SSE/EventSource), GRPC, WebTransport). Centrifugo has the concept of a channel – so it's a user-facing PUB/SUB server.
Centrifugo is language-agnostic and can be used to build chat apps, live comments, multiplayer games, real-time data visualizations, collaborative tools, etc. in combination with any backend. It is well suited for modern architectures and allows decoupling the business logic from the real-time transport layer.
Several official client SDKs for browser and mobile development wrap the bidirectional protocol. In addition, Centrifugo supports a unidirectional approach for simple use cases with no SDK dependency.
For details, go to the Centrifugo documentation site.
What's changed
Improvements
- Support Prometheus native histograms, see #1136. See in docs. Summaries are now DEPRECATED in Centrifugo. Metrics which only had summary now have histogram analogue exposed.
- Kafka consumer: don't re-init the client on retriable fetch errors, see #1137. Should improve stability of consumer during temporary issues with Kafka and prevent unnecessary rebalances.
Fixes
- Add missing
envconfigtags to NATS JetStream consumer config so its fields can be configured via environment variables, see #1117 by @thuy-le-kafi. Also applied the same fix to the Redis Streams and Azure Service Bus consumer configs, which had the same gap. - Fix: Scope JWKS cache by resolved endpoint URL #1142. Fixes GHSA-g6vg-wj8f-48cj reported by @sondt99
- Fix a bunch of flaky integration tests.
Miscellaneous
- This release is built with Go 1.26.3
- Dependency updates
- See also the corresponding Centrifugo PRO release.