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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5498) Secure Bulk Load
Date Thu, 01 Mar 2012 01:33:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13219708#comment-13219708
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Todd Lipcon commented on HBASE-5498:
------------------------------------

This seems backwards - not all bulk loads are text import jobs, so you don't want HBase to
be running the MR job. Instead, it seems you should let the user run his MR job to generate
HFiles however he sees fit, and then work on making the {{completeBulkLoad}} portion able
to transfer ownership.

It seems like a useful HDFS API to allow a {{chown}} call to work so long as you have credentials
for one user and a delegation token for another. We don't have such a facility today, but
I'm much more in support of adding that than having hbase run user code under its own credentials.
                
> Secure Bulk Load
> ----------------
>
>                 Key: HBASE-5498
>                 URL: https://issues.apache.org/jira/browse/HBASE-5498
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Francis Liu
>
> 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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