subscribe to redis cluster

[anton-burtsev]

I deployed redis cluster with following command

helm install my-release oci://registry-1.docker.io/bitnamicharts/redis-cluster

helm created 6 nodes: 3 masters and 3 slaves

I activated notifications on EACH pod

D:\src\red>kubectl exec -ti my-red-redis-cluster-1 -- /bin/bash
I have no name!@my-red-redis-cluster-1:/$ redis-cli config set notify-keyspace-events AKEnm
OK

Then I try to subscribe to key updates. For each i in 0..5 I did

    var redis = await ConnectionMultiplexer.ConnectAsync(
        $"my-red-redis-cluster-{i}.my-red-redis-cluster-headless.default.svc.cluster.local:6379,password={password}");
    var sub = redis.GetSubscriber();
    var channel = new RedisChannel("__key*@*__:*", RedisChannel.PatternMode.Pattern);
    await sub.SubscribeAsync(channel, Accept);
    Console.WriteLine($"Subscribed to channel {i} - {sub.SubscribedEndpoint(channel)}");

I see it connects to the same server for any "i" value

Subscribed to channel 4 - 10.1.37.157:6379
Subscribed to channel 0 - 10.1.37.157:6379
Subscribed to channel 2 - 10.1.37.157:6379
Subscribed to channel 3 - 10.1.37.157:6379
Subscribed to channel 5 - 10.1.37.157:6379
Subscribed to channel 1 - 10.1.37.157:6379

And then I receive only ~ 33% of notifications.

if I subscribe using redis-cli on each server - I receive all notifications too.

What should I do to receive all notifications in C# program?

[mgravell]

Keyspace notification events are not currently supported on cluster; if there is demand, it is feasible - just: as you have observed, it isn't as simple as standard pub/sub, because it doesn't broadcast.

…

On Tue, 4 Feb 2025, 20:54 Anton Burtsev, ***@***.***> wrote: I deployed redis cluster with following command helm install my-release oci://registry-1.docker.io/bitnamicharts/redis-cluster helm created 6 nodes: 3 masters and 3 slaves I activated notifications on EACH pod D:\src\red>kubectl exec -ti my-red-redis-cluster-1 -- /bin/bash I have no ***@***.***:/$ redis-cli config set notify-keyspace-events AKEnm OK Then I try to subscribe to key updates. For each i in 0..5 I did var redis = await ConnectionMultiplexer.ConnectAsync( $"my-red-redis-cluster-{i}.my-red-redis-cluster-headless.default.svc.cluster.local:6379,password={password}"); var sub = redis.GetSubscriber(); var channel = new RedisChannel("__key*@*__:*", RedisChannel.PatternMode.Pattern); await sub.SubscribeAsync(channel, Accept); Console.WriteLine($"Subscribed to channel {i} - {sub.SubscribedEndpoint(channel)}"); I see it connects to the same server for any "i" value Subscribed to channel 4 - 10.1.37.157:6379 Subscribed to channel 0 - 10.1.37.157:6379 Subscribed to channel 2 - 10.1.37.157:6379 Subscribed to channel 3 - 10.1.37.157:6379 Subscribed to channel 5 - 10.1.37.157:6379 Subscribed to channel 1 - 10.1.37.157:6379 And then I receive only ~ 33% of notifications. if I subscribe using redis-cli on each server - I receive all notifications too. What should I do to receive all notifications in C# program? — Reply to this email directly, view it on GitHub <#2846> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAEHMH2XEINSPW73RXCLCD2OESITBFKMF2HI4TJMJ2XIZLTSOBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJLJONZXKZNENZQW2ZNLORUHEZLBMRPXI6LQMWBKK5TBNR2WLJDUOJ2WLJDOMFWWLLTXMF2GG2C7MFRXI2LWNF2HTLDTOVRGUZLDORPXI6LQMWSUS43TOVS2M5DPOBUWG44SQKSHI6LQMWVHEZLQN5ZWS5DPOJ42K5TBNR2WLKBRG43TIOBRHAZYFJDUPFYGLJLJONZXKZNFOZQWY5LFVIZDQMZRGI3TQOBWHCTXI4TJM5TWK4VGMNZGKYLUMU> . You are receiving this email because you are subscribed to this thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .