Redis Cluster keyPrefix doesn't work in redisOptions

version: 4.14.1 According to doc, I think keyPrefix in redisOptions. But it doesn’t work. Like blow:

const redisClient = new Redis.Cluster(nodes, {
  redisOptions: {
    keyPrefix: 'foo:',
  }
});

After attempts, it actually works in root option, like this:

const redisClient = new Redis.Cluster(nodes, {
    keyPrefix: 'foo:',
});

Is it by design?

[aaronleesmith]

This issue was left to die on the vine with an open PR, but it is critical to the functionality of key prefixing. The workaround is to include keyPrefix one level up (on the object which is the second parameter to new Cluster) but the type definitions will yell at you for trying to do that. So you end up having to do something like this:

new Cluster(nodes, clusterRetryStrategy: { this.clusterRetryStrategy,
      redisOptions: {
        maxRetriesPerRequest: 1,
        keyPrefix: `${this.config.RedisNamespace}:`,
      },
      /**
       * The entry below fixes a bug where the keyPrefix is totally ignored when used in cluster mode.
       * The issue has an open PR: https://github.com/luin/ioredis/issues/1024
       */
      keyPrefix: `${this.config.RedisNamespace}:`
} as any)

It would be great if this PR were merged and this was resolved.

[glensc]

would be nice if the fix be ported to 4.x