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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6826) Plugin interface to enable delegation of HDFS authorization assertions
Date Fri, 15 Aug 2014 00:05:19 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur updated HDFS-6826:
-------------------------------------

    Attachment: HDFS-6826-idea2.patch

attach is new POC where the FsPermissionChecker has been made an interface, the original one
renamed to DefaultFsPermissionChecker and the plugin creates a permission checker instance.
(the patch is bigger because of the rename, when committing an svn move would be done to preserve
history of the permission checker)

then the plugin can do both, replace authz info and replace the permission check logic.

I've also remove the refresh() call from the plugin. this means that the plugin does not provide
for  means to make external call during a filesystem operation. A proper plugin impl should
fetch all authz info async from fs operations.

> Plugin interface to enable delegation of HDFS authorization assertions
> ----------------------------------------------------------------------
>
>                 Key: HDFS-6826
>                 URL: https://issues.apache.org/jira/browse/HDFS-6826
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: security
>    Affects Versions: 2.4.1
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>         Attachments: HDFS-6826-idea.patch, HDFS-6826-idea2.patch, HDFSPluggableAuthorizationProposal.pdf
>
>
> When Hbase data, HiveMetaStore data or Search data is accessed via services (Hbase region
servers, HiveServer2, Impala, Solr) the services can enforce permissions on corresponding
entities (databases, tables, views, columns, search collections, documents). It is desirable,
when the data is accessed directly by users accessing the underlying data files (i.e. from
a MapReduce job), that the permission of the data files map to the permissions of the corresponding
data entity (i.e. table, column family or search collection).
> To enable this we need to have the necessary hooks in place in the NameNode to delegate
authorization to an external system that can map HDFS files/directories to data entities and
resolve their permissions based on the data entities permissions.
> I’ll be posting a design proposal in the next few days.



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