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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3100) Make YARN authorization pluggable
Date Thu, 29 Jan 2015 22:36:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-3100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14297828#comment-14297828

Zhijie Shen commented on YARN-3100:

bq. I would like to have YARN ready first and then considering merging the common part into
a common interface.

+1 for staring from YARN first.

Here're some comments about the patch.

1. Should {{AccessType}} be the first class citizen too like {{PrivilegedEntity}}? And there
are 1-to-many relationship between {{PrivilegedEntity}} and {{AccessType}}? For example, Queue
-> \{ADD, DELETE, MODIFY, VIEW\}, App -> 

2. Do we need to include application as another entity type?

3. No need in {{AdminService.java}} any more.
private AccessControlList adminAcl;

4. YarnAuthorizationProvider needs to be annotated? The following java doc is not as complete
as the other methods.
	   * Check if the user is an admin.
   public abstract boolean isAdmin(UserGroupInformation ugi);

5. According to the name, signature and implemenation, the method seems not to be just for
verify admin access, but generich. However, it's only used in AdminService now. After the
code change, the method reduces the use case to only check if it is admin. We may want to
avoid the change or refactor the method name.
  public static UserGroupInformation verifyAccess(
      AccessControlList acl, String method, final Log LOG)
      throws IOException {

6. For YarnAuthorizationProvider, it's better to call init() in getInstance(), such that the
user doesn't need to struggle to make sure init() is just called once and at the first reference.
Just think out loudly. Is the singleton friendly to MiniYARNCluster, where different components
reside in a single process?

> Make YARN authorization pluggable
> ---------------------------------
>                 Key: YARN-3100
>                 URL: https://issues.apache.org/jira/browse/YARN-3100
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-3100.1.patch, YARN-3100.2.patch
> The goal is to have YARN acl model pluggable so as to integrate other authorization tool
such as Apache Ranger, Sentry.
> Currently, we have 
> - admin ACL
> - queue ACL
> - application ACL
> - time line domain ACL
> - service ACL
> The proposal is to create a YarnAuthorizationProvider interface. Current implementation
will be the default implementation. Ranger or Sentry plug-in can implement  this interface.
> Benefit:
> -  Unify the code base. With the default implementation, we can get rid of each specific
ACL manager such as AdminAclManager, ApplicationACLsManager, QueueAclsManager etc.
> - Enable Ranger, Sentry to do authorization for YARN. 

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