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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5498) Secure Bulk Load
Date Thu, 07 Jun 2012 16:17:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13291104#comment-13291104
] 

Jonathan Hsieh commented on HBASE-5498:
---------------------------------------

This is a little bit outside my wheelhouse so expect I'd expect more feedback from Andrew
or Todd (or me once I ingest more of this).  Here are some quick comments / questions from
a skim of the patch:
- Is the design doc on HCatalog wiki relevant to the new implementation?  (Why in HCatalog?)
- We should also probably add a postBulkLoadHFile to be symmetric.  If this drags out, consider
adding a "add postBulkLoadHFile and preBulkLoadHFile to RegionObserver/BaseRegionObserver"
subissue -- it would likely committed quickly alone.
- This needs null check guard on getCoprocessHost()
{code}
       }
+      region.getCoprocessorHost()
+          .preBulkLoadHFile(familyPaths);
       boolean loaded = region.bulkLoadHFiles(familyPaths);
{code}
- SecureBulkLoadEndPoint/SecureBulkLoadProtocol will need an apache license header

                
> Secure Bulk Load
> ----------------
>
>                 Key: HBASE-5498
>                 URL: https://issues.apache.org/jira/browse/HBASE-5498
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapred, security
>            Reporter: Francis Liu
>         Attachments: HBASE-5498_draft.patch
>
>
> Design doc: https://cwiki.apache.org/confluence/display/HCATALOG/HBase+Secure+Bulk+Load
> Short summary:
> Security as it stands does not cover the bulkLoadHFiles() feature. Users calling this
method will bypass ACLs. Also loading is made more cumbersome in a secure setting because
of hdfs privileges. bulkLoadHFiles() moves the data from user's directory to the hbase directory,
which would require certain write access privileges set.
> Our solution is to create a coprocessor which makes use of AuthManager to verify if a
user has write access to the table. If so, launches a MR job as the hbase user to do the importing
(ie rewrite from text to hfiles). One tricky part this job will have to do is impersonate
the calling user when reading the input files. We can do this by expecting the user to pass
an hdfs delegation token as part of the secureBulkLoad() coprocessor call and extend an inputformat
to make use of that token. The output is written to a temporary directory accessible only
by hbase and then bulkloadHFiles() is called.

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