centrifugal/centrifugo v6.6.1

on GitHub

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

• Better configdoc UI #1092. Redesigned centrifugo configdoc interface with top-level navigation, search, JSON/YAML snippets (🔥), and dark/light themes.
• Add hmac_previous_secret_key and hmac_previous_secret_key_valid_until options to provide a possibility to rotate HMAC token #1103, docs
• Adding json_object publication data format – more strict format to ensure a JSON object in channels #1091
• Centrifugo Helm chart v13 was released - comes with many improvements, documentation and examples.
• Adopt latest quic-go and webtransport-go changes, WebTransport test #1101
• Refactor metrics – makes metrics configurable on server start and discoverable from one place #1093
• Kafka consumer: avoid using static instance id by default, add logging, eliminate one extra goroutine per partition, more reliable shutdown #1105

Fixes

• Redis broker: avoid offset incrementing on publication suppress by version centrifugal/centrifuge#549
• Add missing mutex Unlock() by @palkan in centrifugal/centrifuge#552

Miscellaneous

• This release is built with Go 1.25.7
• Updated dependencies
• See also the corresponding Centrifugo PRO release.