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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7446) Docker container privileged mode and --user flag contradict each other
Date Mon, 12 Feb 2018 21:28:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361464#comment-16361464
] 

Eric Yang commented on YARN-7446:
---------------------------------

[~ebadger] Thank you for the review.  I will address those concerns, and upload a new patch.

> Docker container privileged mode and --user flag contradict each other
> ----------------------------------------------------------------------
>
>                 Key: YARN-7446
>                 URL: https://issues.apache.org/jira/browse/YARN-7446
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0
>            Reporter: Eric Yang
>            Assignee: Eric Yang
>            Priority: Major
>         Attachments: YARN-7446.001.patch, YARN-7446.002.patch
>
>
> In the current implementation, when privileged=true, --user flag is also passed to docker
for launching container.  In reality, the container has no way to use root privileges unless
there is sticky bit or sudoers in the image for the specified user to gain privileges again.
 To avoid duplication of dropping and reacquire root privileges, we can reduce the duplication
of specifying both flag.  When privileged mode is enabled, --user flag should be omitted.
 When non-privileged mode is enabled, --user flag is supplied.



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