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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14556) S3A to support Delegation Tokens
Date Wed, 26 Sep 2018 15:14:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16628926#comment-16628926
] 

Daryn Sharp commented on HADOOP-14556:
--------------------------------------

bq, irrespective of the user:secret issue, I don't think I fully understand why there's support
for multiple sessions here

I did this so long ago, w/o understanding as much about s3 as you, that I need to refresh
my memory on whether it was intentional or not.  Some of the design consideration your highlight,
such always getting a STS token, were purposeful shortcuts (hence not submitted to community)
since internally it is a solid requirement.

Thanks for carrying this forward, I will try to review when I'm back from travel!

> S3A to support Delegation Tokens
> --------------------------------
>
>                 Key: HADOOP-14556
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14556
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.2.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>         Attachments: HADOOP-14556-001.patch, HADOOP-14556-002.patch, HADOOP-14556-003.patch,
HADOOP-14556-004.patch, HADOOP-14556-005.patch, HADOOP-14556-007.patch, HADOOP-14556.oath-002.patch,
HADOOP-14556.oath.patch
>
>
> S3A to support delegation tokens where
> * an authenticated client can request a token via {{FileSystem.getDelegationToken()}}
> * Amazon's token service is used to request short-lived session secret & id; these
will be saved in the token and  marshalled with jobs
> * A new authentication provider will look for a token for the current user and authenticate
the user if found
> This will not support renewals; the lifespan of a token will be limited to the initial
duration. Also, as you can't request an STS token from a temporary session, IAM instances
won't be able to issue tokens.



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