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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6826) Plugin interface to enable delegation of HDFS authorization assertions
Date Wed, 20 Aug 2014 00:47:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14103164#comment-14103164
] 

Alejandro Abdelnur commented on HDFS-6826:
------------------------------------------

[~jinzhao],

Wiring the authz plugin to the snapshot lifecycle requires the following methods:

* setSnaphostDirs(Map<INode, snapshotID>) // called at start up time, allowing the plugin
to know existing snapshots
* addSnapshotDir(INode)
* removeSnapshotDir(INode)
* createSnapshot(INode, snapshotID)
* deleteSnapshot(INode, snapshotID)

The authz plugin is given to the SnapshotManager at startup, and the SnapshotManager would
call these methods in the corresponding snapshot operations.

This will allow the authz plugin (if desired) to keep track of snapshots and to perform its
own snapshot management for authz information.


> 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, HDFS-6826v3.patch,
HDFS-6826v4.patch, HDFS-6826v5.patch, HDFSPluggableAuthorizationProposal-v2.pdf, 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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