RedisCluster doesn't support dbs other than 0?

[jarrington-supernatural]

Version: What redis-py and what redis version is the issue happening on?
4.3.4 and 4.4.0rc3

Platform: What platform / version? (For example Python 3.5.1 on Windows 7 / Ubuntu 15.10 / Azure)
Python 3.9, WSL2 Ubuntu

Description: Description of your issue, stack traces from errors and code that reproduces the issue
We are migrating from a single redis host to a redis cluster in elasticache. We are already using several dbs in the target instance and want to continue to do so. According to the RedisCluster class, we should be able to use a db other than 0 to connect. See https://github.com/redis/redis-py/blob/v4.4.0rc3/redis/cluster.py#L405-L413

However, actually using any db other than 0 results in an exception. See https://github.com/redis/redis-py/blob/v4.4.0rc3/redis/cluster.py#L512-L516

Is this intentional or am I missing something?

[Ernest0x]

From https://redis.io/docs/reference/cluster-spec/:

Redis Cluster does not support multiple databases like the standalone version of Redis. We only support database 0; the SELECT command is not allowed.

[jarrington-supernatural]

In that case, we should update the documentation (especially here) to ensure this doesn't happen again.

[chayim]

@jarrington-supernatural Agreed! Any chance you'd like to help with that?

[chayim]

@shacharPash Another one... this is in the documentation side.

[github-actions]

This issue is marked stale. It will be closed in 30 days if it is not updated.