Add an optional flag to relax S3 bucket names check

[mtse-btg]

Hello Clyso team,

• Understanding that Amazon s3 spec no longer allows for the use of uppercase and underscore within S3 bucket names, and I appreciate your code currently have a regex check to enforce such naming convention.
  • https://github.com/clyso/chorus/blob/main/pkg/s3/validate.go#L27
• Our company has been using Ceph for many years (before the Amazon spec was updated), and we have some old buckets with underscore in their name.
  • In order for us to use Chorus to replicate currently, we need to compile our own copy of Chorus worker container by removing the underscore pattern from validBucketName in the Chorus source code.
• As a feature request, please may I ask if it would be possible to add a flag to chorctl, or to Worker YAML config, so that such option can be switched on for buckets with "relaxed" name to be replicated.
  • This would be similar to the config rgw_relaxed_s3_bucket_names which Ceph has introduced for its backward compatibility.

Many thanks.