Centrifugo is a scalable real-time messaging server written in Go language. Centrifugo can instantly deliver messages to application online users connected over supported real-time transports (WebSocket, HTTP-streaming, SSE/EventSource, GRPC, SockJS). Centrifugo has a channel concept – so it's a user-facing PUB/SUB server.
Centrifugo is language-agnostic and can be used to build chat applications, live comments, multiplayer games, streaming metrics, etc., in conjunction with any backend. It fits well modern architectures and allows decoupling business logic from the real-time transport layer.
Several official client SDKs for browser and mobile development wrap bidirectional protocol. Also, Centrifugo supports a unidirectional approach for simple zero-SDK-dependency use cases.
For the detailed information follow to Centrifugo documentation site.
See installation instructions in Centrifugo documentation.
Try our demo instance on Heroku (admin password is password, token_hmac_secret_key is secret, API key is api_key). Or deploy your own Centrifugo instance in one click:
- Centrifugo is fast and capable to scale to millions of simultaneous connections
- Simple integration with any application – works as separate service, provides HTTP and GRPC API
- Client connectors for popular frontend environments – for both web and mobile development
- Strict client protocol based on Protobuf schema
- Bidirectional transport support (WebSocket and SockJS) for full-featured communication
- Unidirectional transport support without need in client connectors - use native APIs (SSE, Fetch, WebSocket, GRPC)
- User authentication with a JWT or over connection request proxy to configured HTTP/GRPC endpoint
- Proper connection management and expiration control
- Various types of channels: anonymous, authenticated, private, user-limited
- Various types of subscriptions: client-side or server-side
- Transform RPC calls over WebSocket/SockJS to configured HTTP or GRPC endpoint call
- Presence information for channels (show all active clients in a channel)
- History information for channels (last messages published into a channel)
- Join/leave events for channels (client subscribed/unsubscribed)
- Automatic recovery of missed messages between reconnects over configured retention period
- Built-in administrative web panel
- Cross platform – works on Linux, macOS and Windows
- Ready to deploy (Docker, RPM/DEB packages, automatic TLS certificates, Prometheus instrumentation, Grafana dashboard)
- Open-source license
This repository is hosted by packagecloud.io.
Also thanks to JetBrains for supporting OSS (most of the code here written in Goland):
