redis_broker_presence

In this example we show how to connect several Centrifuge server nodes with Redis – thus making it possible to scale nodes.

Start 2 Redis servers locally (we could use just one actually, but here we show builtin Redis sharding feature):

redis-server --port 6379

And another one on port 6380:

redis-server --port 6380

Then start 2 instances of this app on different ports:

go run main.go -port 8000

And:

go run main.go -port 8001

Then go to http://localhost:8000 and to http://localhost:8001 in another browser tab. You will see simple chat app in both browser tabs, try writing a chat message in one browser tab – you should see it appears in another tab.

This example uses two Redis instances so published messages will be automatically sharded among them (consistently sharded by a channel).