Support Redis clusters

[miguelgrinberg]

No description provided.

[miguelgrinberg]

Proposed solution here: miguelgrinberg/Flask-SocketIO#1452

[miguelgrinberg]

Redis Sentinel can be used via the Kombu manager.

[fidoriel]

AsyncRedisManager seems not to support Cluster Mode.
It will require: redis/redis-py#2219

[zachary-jordan16]

@miguelgrinberg - Although redis-py does not seem to have support for cluster mode, it's possible that coredis could be used for the async pub-sub implementation in cluster mode. Is this something that could be considered? Would love to utilize the AsyncRedisManager, but we require cluster mode.

[miguelgrinberg]

My suggestion is that you build your own integration by creating a custom client manager class based on the Redis one. If you get it to work, then we can look at integrating it. I just recently added support for Redis Sentinel based on a custom implementation from a user. This would work in the same way