Configuration to expose buckets under non-default volumes

Ozone S3 Gateway allows access to all the buckets under the default /s3v volume. To access the buckets under a non-default volume, you must create a symbolic link to that bucket.

Consider a non-default volume /vol1 that has a bucket /bucket1 in the following example:
ozone sh volume create /s3v
ozone sh volume create /vol1

ozone sh bucket create /vol1/bucket1
ozone sh bucket link /vol1/bucket1 /s3v/common-bucket

As shown in the example, you can expose /bucket1 as an s3-compatible /common-bucket bucket through the Ozone S3 Gateway.