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https://issues.apache.org/jira/browse/YARN-7430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16250276#comment-16250276
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Eric Badger commented on YARN-7430:
-----------------------------------
bq. User 12345 shouldn't belong to root group, but it has been given root group
privileges in the container. There are customers out there that utilized uid
number as their user account. Any numeric user is given root group privileges
automatically. This shouldn't be happening.
I could be wrong, but I don't think [[email protected]]'s question is
whether this happens in docker, but whether this is possible to happen in
hadoop. i.e. can the above docker run (or similar) ever actually be created by
the NM starting up a docker container.
> User and Group mapping are incorrect in docker container
> --------------------------------------------------------
>
> Key: YARN-7430
> URL: https://issues.apache.org/jira/browse/YARN-7430
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: security, yarn
> Affects Versions: 2.9.0, 3.0.0
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Blocker
> Attachments: YARN-7430.001.patch
>
>
> In YARN-4266, the recommendation was to use -u [uid]:[gid] numeric values to
> enforce user and group for the running user. In YARN-6623, this translated
> to --user=test --group-add=group1. The code no longer enforce group
> correctly for launched process.
> In addition, the implementation in YARN-6623 requires the user and group
> information to exist in container to translate username and group to uid/gid.
> For users on LDAP, there is no good way to populate container with user and
> group information.
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