Or use an md5 of the bucket name with a prefix and make bucket names with that prefix followed by a bunch of hex chars illegal bucket names. It doesn’t need to

Or use an md5 of the bucket name with a prefix and make bucket names with that prefix followed by a bunch of hex chars illegal bucket names. It doesn’t need to be pretty, it’s only an alias that will never be typed or viewed by a human. [edit]: I assume that new bucket names that break subdomains have been made illegal now so they work with a finite and static list of names. I am sure they can come up with a substitution that doesn't create collisions and with a reserved prefix you can avoid future collisions.