Socket.IO Chat with haproxy & redis

A simple chat demo for socket.io

How to use

Install Docker Compose, then:

$ docker-compose up -d

And then point your browser to http://localhost:3000.

This will start four Socket.IO nodes, behind a haproxy instance which will loadbalance the requests (using a cookie for sticky sessions, see cookie).

Each node connects to the redis backend, which will enable to broadcast to every client, no matter which node it is currently connected to.

# you can kill a given node, the client should reconnect to another node
$ docker-compose stop server-george

Features

• Multiple users can join a chat room by each entering a unique username on website load.
• Users can type chat messages to the chat room.
• A notification is sent to all users when a user joins or leaves the chatroom.