I’m trying to write a straightforward .Net app that will subscribe to a cluster of Redis nodes, to receive change notifications.

The cluster configuration is the following:

➜ redis-cli -h 10.0.255.86
10.0.255.86:6379> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:3
cluster_size:3
cluster_current_epoch:3
cluster_my_epoch:1
cluster_stats_messages_ping_sent:56121935
cluster_stats_messages_pong_sent:56144253
cluster_stats_messages_fail_sent:26
cluster_stats_messages_sent:112266214
cluster_stats_messages_ping_received:56144251
cluster_stats_messages_pong_received:56121914
cluster_stats_messages_meet_received:2
cluster_stats_messages_fail_received:16
cluster_stats_messages_received:112266183
total_cluster_links_buffer_limit_exceeded:0
10.0.255.86:6379> cluster nodes
d8c89d2e48623dc09840ec0f819c6b1f66bacfd7 10.0.255.86:6379@16379 myself,master - 0 1688093343000 1 connected 0-5460
22ccfb5a7aa80e5946cdca37a086b65cd56147c2 10.0.255.88:6379@16379 master - 0 1718880916241 3 connected 10923-16383
4d5f1e2f4eef90d818335cfef0ecb8763c065b2d 10.0.255.87:6379@16379 master - 0 1718880917304 2 connected 5461-10922

each node is configured with: notify-keyspace-events KEA

10.0.255.86:6379> config get notify-keyspace-events
1) "notify-keyspace-events"
2) "AKE"
10.0.255.86:6379>

If I connect redis-cli to all nodes and subscribe with PSUBSCRIBE __key*__:* I will receive all the changes that happen on each of them. However, when I run the app it will output Subscribed to Redis endpoint 10.0.255.86:6379 and will only receive messages from 10.0.255.86.

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var redis = ConnectionMultiplexer.Connect("10.0.255.86:6379, 10.0.255.87:6379, 10.0.255.88:6379");

            var subscriber = redis.GetSubscriber();

            RedisChannel topic = "__key*__:*";

            subscriber.Subscribe(topic, (channel, value) =>
            {
                System.Console.WriteLine("Key change notification received. Channel: {0}, Value: {1}", channel, value);
            });

            var endpoint = subscriber.SubscribedEndpoint(topic);

            System.Console.WriteLine("Subscribed to Redis endpoint {0}", endpoint);

            System.Console.ReadLine();
        }
    }
}

Can anybody tell if there is a way to subscribe to receive the notifications from all the nodes? If the ConnectionMultiplexer supports it, then what do I do wrong?
I tried using a separate multiplexer per node but those that connect to 10.0.255.87 and 10.0.255.88 still get the messages from 10.0.255.86 only. I guess the ConnectionMultiplexer gets the whole list of nodes after connects and always subscribes for the first one.

I would appreciate any help!
Thanks!