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From "Leo Liou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11683) Need a plugin API to translate long principal names to local OS user names arbitrarily
Date Fri, 06 Mar 2015 20:31:38 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14350846#comment-14350846

Leo Liou commented on HADOOP-11683:

Interesting idea about the mapping file.
To sync the files on many nodes is still issue, although NFS is one possibility.

Still, the users would either write their own plug-in (to an interface), or obtain it from
some ISV.
It still has to be deployed in a controlled fashion - since users would have to configure
So, maybe I missed the point about the concern for a plug-in in this case. 

My other thought is that translation rules are still fairly rigid. 
None of us can foresee all the different issues or possibilities in the future.
I would suggest that to delegate this part to a plug-in and not making it a Hadoop issue is
quite attractive. 

just my 2 cents. 

> Need a plugin API to translate long principal names to local OS user names arbitrarily
> --------------------------------------------------------------------------------------
>                 Key: HADOOP-11683
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11683
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Sunny Cheung
> We need a plugin API to translate long principal names (e.g. john.doe@EXAMPLE.COM) to
local OS user names (e.g. user123456) arbitrarily.
> For some organizations the name translation is straightforward (e.g. john.doe@EXAMPLE.COM
to john_doe), and the hadoop.security.auth_to_local configurable mapping is sufficient to
resolve this (see HADOOP-6526). However, in some other cases the name translation is arbitrary
and cannot be generalized by a set of translation rules easily.

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