HAProxy-WebSocket Sticky Session feature allows clients to send all of their WebSocket queries to the same backend server at once. At Bobcares, with our Server Management Service, we can handle your issues.

HAProxy-WebSocket Sticky Session

The Sticky Session in the context of HAProxy and WebSocket, also known as “session affinity” or “session persistence” involves sending all WebSocket requests from a client to the same backend server for the duration of their session.

HAProxy can be used to divide incoming WebSocket requests among the backend servers if we have several of them managing WebSocket connections. WebSocket connections, however, are stateful. It means that it is crucial to make sure that all messages sent by a client are routed to the same backend server after connecting to one. “Sticky sessions” are useful in this situation.

HAProxy can enable sticky sessions in a load-balanced environment by providing each client with a special identification code (often a cookie) at the time of initial connection. Then, the client is connected to a certain backend server using this identifier. The backend server linked to the client’s identification receives all subsequent WebSocket requests from that client, thus guaranteeing that the server receives all of the client’s WebSocket messages.

Advantages

1. Sticky sessions ensure that WebSocket connections made by the same client are always forwarded to the same backend server. This is also crucial for maintaining the state of the app and ensuring the consistency of message delivery.

2. Keeping session-specific data on a specific backend server is necessary for some WebSocket applications. Sticky sessions will make sure that the client keeps communicating with the same server during the session, as well as aid in the preservation of this data.

Setup Steps

1. Initially, make sure HAProxy is set up to detect WebSocket traffic.

2. Then, create a system (typically utilizing cookies) to recognize clients and link them to particular backend servers when they initially connect.

3. Next WebSocket communications should be forwarded to the appropriate backend server using the discovered client-server association.

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Conclusion

We can make sure that clients in WebSocket-based apps have a seamless and consistent experience by using HAProxy WebSocket sticky sessions