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https://issues.apache.org/jira/browse/HDFS-12907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283173#comment-16283173
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Xiao Chen commented on HDFS-12907:
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Thanks for the explanation Daryn.
The rage block is what's painful for us as well, when supporting different
downstream components and partners. I hope the kms clients were designed /
documented / implemented / reviewed perfectly too. Interestingly if you see the
history of KMSCP class you'll see quite a few attempts to make it 'work for the
case of xxx'. Maybe what you described can be fixed in a new jira, and consider
some of the past behaviors simply wrong so we don't worry about compatibility.
Agree letting the DN to pass through raw bytes would be great. I hope this can
be rolled into a simple design doc for HDFS-12355 so other people can figure
out easily.
> Allow read-only access to reserved raw for non-superusers
> ---------------------------------------------------------
>
> Key: HDFS-12907
> URL: https://issues.apache.org/jira/browse/HDFS-12907
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.6.0
> Reporter: Daryn Sharp
> Assignee: Rushabh S Shah
> Attachments: HDFS-12907.001.patch, HDFS-12907.patch
>
>
> HDFS-6509 added a special /.reserved/raw path prefix to access the raw file
> contents of EZ files. In the simplest sense it doesn't return the FE info in
> the {{LocatedBlocks}} so the dfs client doesn't try to decrypt the data.
> This facilitates allowing tools like distcp to copy raw bytes.
> Access to the raw hierarchy is restricted to superusers. This seems like an
> overly broad restriction designed to prevent non-admins from munging the EZ
> related xattrs. I believe we should relax the restriction to allow
> non-admins to perform read-only operations. Allowing non-superusers to
> easily read the raw bytes will be extremely useful for regular users, esp.
> for enabling webhdfs client-side encryption.
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