Unable to configure AWS elasticache redis with channel_redis

[SanaZulfiqar]

Hello,
I am trying to use AWS Elasticache Redis cluster as backend with channels_redis for connecting to websocket. However, I am unable to configure that as container get restarted every time try making connection. It works well if i connect the single host redis instead of cluster one.

This is the configuration i am using:

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": {
            "hosts": [("configration_endpoint", "port")],
            "capacity": 10_000,
            "prefix":  "channel-layer:",
        },
    },
}

Version of channels-redis:

channels==3.0.4
channels-redis==3.3.0

• What you expected to happen?
  AWS elasticache redis working well with django channels

I am using uvicorn to run the channel.

[sevdog]

Could you please provide a stacktrace or a log which shows which the error?

Which kind of configuration are you using to run your project?

[Sanji515]

I think we are not able to support AWS Elasticache Cluster mode with channels_redis. As it does not have native support for Redis clusters. It can connect to a single Redis instance or a simple setup with multiple Redis instances configured as separate hosts, but it cannot handle Redis cluster features like key distribution and MOVED responses out-of-the-box.

redis-py-cluster <- This Python library is specifically designed to work with Redis clusters and will handle the MOVED redirection automatically. But it cannot be direct integrated with channels_redis

I'm not sure, probably as a workaround we need to create a custom backend using RedisChannelLayer to add redis cluster client from redis-py-cluster to work with Redis Cluster for AWS Elasticache.

[amirreza8002]

redis-py-cluster is not maintained
redis-py itself has cluster support now.

but yes cluster and normal servers are different
you can't/shouldn't connect to one using the other