Aaron Fabbri created HADOOP-15525:
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             Summary: s3a: clarify / improve support for mixed ACL buckets
                 Key: HADOOP-15525
                 URL: https://issues.apache.org/jira/browse/HADOOP-15525
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs/s3
    Affects Versions: 3.0.0
            Reporter: Aaron Fabbri


Scenario: customer wants to only give a Hadoop cluster access to a subtree of 
an S3 bucket.

For example, assume Hadoop uses some IAM identity "hadoop", which they wish to 
grant full permission to everything under the following path:

s3a://bucket/a/b/c/hadoop-dir

they don't want hadoop user to be able to read/list/delete anything outside of 
the hadoop-dir "subdir"

Problems: 

To implement the "directory structure on flat key space" emulation logic we use 
to present a Hadoop FS on top of a blob store, we need to create / delete / 
list ancestors of {{hadoop-dir}}. 

I'd like us to either (1) document a workaround (example IAM ACLs) that gets 
this basic functionality, and/or (2) make improvements to make this less 
painful.

We've discussed some of these issues before but I didn't see a dedicated JIRA.



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