[jira] [Commented] (HADOOP-16298) Manage/Renew delegation tokens for externally scheduled jobs

["Shilun Fan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-16298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802938#comment-17802938 ] 

Shilun Fan commented on HADOOP-16298:
-------------------------------------

Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a blocker. Retarget 3.5.0.

> Manage/Renew delegation tokens for externally scheduled jobs
> ------------------------------------------------------------
>
>                 Key: HADOOP-16298
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16298
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 3.3.0
>            Reporter: Pankaj Deshpande
>            Assignee: Clay B.
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: Proposal for changes to UGI for managing_renewing externally managed delegation tokens.pdf
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> * Presently when jobs are run in the Hadoop ecosystem, the implicit assumption is that YARN will be used as a scheduling agent with access to appropriate keytabs for renewal of kerberos tickets and delegation tokens. 
>  * Jobs that interact with kerberized hadoop services such as hbase/hive/hdfs and use an external scheduler such as Kubernetes, typically do not have access to keytabs. In such cases, delegation tokens are a logical choice for interacting with a kerberized cluster. These tokens are issued based on some external auth mechanism (such as Kube LDAP authentication).



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