[jira] [Updated] (HADOOP-9296) Authenticating users from different realm without a trust relationship

["Benoy Antony (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-9296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoy Antony updated HADOOP-9296:
---------------------------------

    Attachment: HADOOP-9296.patch

To enable the same feature on Hadoop 2 , I need to make the following changes.

*Server side changes*

# Enable Hadoop server to load multiple Kerberos principals. 
# Hadoop server will return all its principals to the client. 

{noformat}
S -> C NEGOTIATE  - Kerberos authmethod has multiple principals in serverid
{noformat}


*Client side changes*

# If there are multiple principals, the client chooses a principal in its realm.

This is tested on our clusters. Please review and comment. 

> Authenticating users from different realm without a trust relationship
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-9296
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9296
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>         Attachments: HADOOP-9296-1.1.patch, HADOOP-9296.patch, multirealm.pdf
>
>
> Hadoop Masters (JobTracker and NameNode) and slaves (Data Node and TaskTracker) are part of the Hadoop domain, controlled by Hadoop Active Directory. 
> The users belong to the CORP domain, controlled by the CORP Active Directory. 
> In the absence of a one way trust from HADOOP DOMAIN to CORP DOMAIN, how will Hadoop Servers (JobTracker, NameNode) authenticate  CORP users ?
> The solution and implementation details are in the attachement



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