AWS application load balancer and socket io

Question

I have a socket.io chat room whose traffic is increasing, and now we are looking to grow our capacity with multiple nodes. So will the ALB automatically redirect my messages?

Answer 1

Yes, ALB will load balance the users but need to add code as users will be distributed within different servers.

var io = require('socket.io')(3000);

var redis = require('socket.io-redis');

io.adapter(redis({ host: 'localhost', port: 6379 }));

Also, enable sticky session in ALB, or else socket.io handshake will fail

Want to learn more about ALB, Come and join:  AWS Course