Unable to mount GCS bucket with underscores in the name

[legobricks]

I have two buckets with the same configurations and labels.One is named my-bucket and the other is my_bucket. I am able to mount my-bucket but get an opaque error message when trying to mount my_bucket. Is this known/expected behavior? Are underscores unsupported in bucket names? I know AWS does not support them

[Walter_C]

Hello it seems this is a known issue which is being worked by our engineering team. This is because when handling the mount point information we are using java.net.URI which does not accept _ in the hostname. 

[legobricks]

Thanks Walter. Is there a workaround beyond deleting/renaming/duplicating the buckets? That would be duping a lot of data.

[legobricks]

@Walter_C  thanks again for the update. Following up with another question as we need to make a decision on our bucket naming this week. Is there documentation explaining any other limitations, or any other unsupported characters? We'd hate to have to migrate everything again

[NandiniN]

Hi @legobricks ,

Curious on the error that you are getting. However, for GCS - https://cloud.google.com/storage/docs/buckets#naming I do see underscores are allowed but there is also a note below:

You can use a bucket name in a DNS record as part of a CNAME or A redirect.This means that your bucket name should not use underscores (_) or have a period next to another period or dash. For example, .., -., and .- are invalid character combinations within DNS names.

This lists the general bucket naming rules for AWS. https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html 

Thanks!