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From "jiraposter@reviews.apache.org (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3025) Coprocessor based simple access control
Date Tue, 01 Nov 2011 21:19:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13141611#comment-13141611

jiraposter@reviews.apache.org commented on HBASE-3025:

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(Updated 2011-11-01 21:18:27.775440)

Review request for hbase.


Fixed the security class package names (o.a.h.h.security.rbac -> o.a.h.h.security.access)
in src/main/ruby/hbase/security.rb


This patch implements access control list based authorization of HBase operations.  The patch
depends on the currently posted patch for HBASE-2742 (secure RPC engine).

Key parts of the implementation are:

* AccessControlLists - encapsulates storage of permission grants in a metadata table ("_acl_").
 This differs from previous implementation where the ".META." table was used to store permissions.

* AccessController - 
  - implements MasterObserver and RegionObserver, performing authorization checks in each
of the preXXX() hooks.  If authorization fails, an AccessDeniedException is thrown.
  - implements AccessControllerProtocol as a coprocessor endpoint to provide RPC methods for
granting, revoking and listing permissions.

* ZKPermissionWatcher (and TableAuthManager) - synchronizes ACL entries and updates throughout
the cluster nodes using ZK.  ACL entries are stored in per-table znodes as /hbase/acl/tablename.

* Additional ruby shell scripts providing the "grant", "revoke" and "user_permission" commands

* Support for a new OWNER attribute in HTableDescriptor.  I could separate out this change
into a new JIRA for discussion, but I don't see it as currently useful outside of security.
 Alternately, I could handle the OWNER attribute completely in AccessController without changing
HTD, but that would make interaction via hbase shell a bit uglier.

This addresses bug HBASE-3025.

Diffs (updated)

  security/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlLists.java PRE-CREATION

  security/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java PRE-CREATION

  security/src/main/java/org/apache/hadoop/hbase/security/access/Permission.java PRE-CREATION

  security/src/main/java/org/apache/hadoop/hbase/security/access/TableAuthManager.java PRE-CREATION

  security/src/main/java/org/apache/hadoop/hbase/security/access/TablePermission.java PRE-CREATION

  security/src/main/java/org/apache/hadoop/hbase/security/access/UserPermission.java PRE-CREATION

  security/src/test/java/org/apache/hadoop/hbase/security/access/SecureTestUtil.java PRE-CREATION

  src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java 99875b8 
  src/main/java/org/apache/hadoop/hbase/coprocessor/BaseRegionObserver.java 8a40762 
  src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java bb67e53 
  src/main/resources/hbase-default.xml 3785533 
  src/main/ruby/hbase.rb 4d27191 
  src/main/ruby/hbase/admin.rb 61e04d8 
  src/main/ruby/hbase/hbase.rb beb2450 
  src/main/ruby/hbase/security.rb PRE-CREATION 
  src/main/ruby/shell.rb 9a47600 
  src/main/ruby/shell/commands.rb a352c2e 
  src/main/ruby/shell/commands/grant.rb PRE-CREATION 
  src/main/ruby/shell/commands/revoke.rb PRE-CREATION 
  src/main/ruby/shell/commands/user_permission.rb PRE-CREATION 

Diff: https://reviews.apache.org/r/2041/diff




> Coprocessor based simple access control
> ---------------------------------------
>                 Key: HBASE-3025
>                 URL: https://issues.apache.org/jira/browse/HBASE-3025
>             Project: HBase
>          Issue Type: Sub-task
>          Components: coprocessors
>            Reporter: Andrew Purtell
>         Attachments: HBASE-3025.1.patch, HBASE-3025.2011-02-01.patch
> Thanks for the clarification Jeff which reminds me to edit this issue.
> Goals of this issue
> # Client access to HBase is authenticated
> # User data is private unless access has been granted
> # Access to data can be granted at a table or per column family basis. 
> Non-Goals of this issue
> The following items will be left out of the initial implementation for simplicity:
> # Row-level or per value (cell) This would require broader changes for storing the ACLs
inline with rows. It's still a future goal, but would slow down the initial implementation
> # Push down of file ownership to HDFS While table ownership seems like a useful construct
to start with (at least to lay the groundwork for future changes), making HBase act as table
owners when interacting with HDFS would require more changes. In additional, while HDFS file
ownership would make applying quotas easy, and possibly make bulk imports more straightforward,
it's not clean it would offer a more secure setup. We'll leave this to evaluate in a later
> # HBase managed "roles" as collections of permissions We will not model "roles" internally
in HBase to begin with. We will instead allow group names to be granted permissions, which
will allow some external modeling of roles via group memberships. Groups will be created and
manipulated externally to HBase. 
> While the assignment of permissions to roles and roles to users (or other roles) allows
a great deal of flexibility in security policy, it would add complexity to the initial implementation.

> After the initial implementation, which will appear on this issue, we will evaluate the
addition of role definitions internal to HBase in a new JIRA. In this scheme, administrators
could assign permissions specifying HDFS groups, and additionally HBase roles. HBase roles
would be created and manipulated internally to HBase, and would appear distinct from HDFS
groups via some syntactic sugar. HBase role definitions will be allowed to reference other
HBase role definitions. 

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