How to use websockets on node. js?

Question

Node.js

Let's allow 8 node instances to have websocket connections, how to send change messages to everyone if the instances are different? Servers?

Answer 1

within a node cluster - using the worker.send() method
within multiple servers: a pubsub would most likely need to be set up. Redis, various *MQs, that's it. a bunch of options

Answer 2

Redis pubsub used.

Answer 3

I used socket.io in production, or I don’t know how to cook it .... or the skis don’t go
, sometimes the messages didn’t reach the users, and the restart helped
, eventually spat and installed the nginx push stream module, 2,000 online, the flight is excellent

Answer 4

I use Redis pubsub, but I need to implement the logic myself (though not for long). Socket.io runs out of the box through redis pubsub.