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From "Eric Badger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7446) Docker container privileged mode and --user flag contradict each other
Date Mon, 12 Feb 2018 17:21:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361107#comment-16361107

Eric Badger commented on YARN-7446:

Another thing I just found while testing out YARN-7221 is that this patch doesn't remove the
"--group-add" calls, which accompany the "--user". Those should be disabled as well

> 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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