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From "Greg Phillips (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5280) Allow YARN containers to run with Java Security Manager
Date Tue, 14 Feb 2017 21:26:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15866716#comment-15866716
] 

Greg Phillips commented on YARN-5280:
-------------------------------------

[~rkanter] - From your previous note it became clear simply limiting the container to execute
something called 'java' is inherently insecure.  This patch ensures the java executable used
to run the NodeManager is also used for the container.  If a different version of Java or
even a shell script named 'java' is provided an exception will be thrown in enforcing mode,
or a warning will be logged in permissive mode.

> Allow YARN containers to run with Java Security Manager
> -------------------------------------------------------
>
>                 Key: YARN-5280
>                 URL: https://issues.apache.org/jira/browse/YARN-5280
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager, yarn
>    Affects Versions: 2.6.4
>            Reporter: Greg Phillips
>            Assignee: Greg Phillips
>            Priority: Minor
>              Labels: oct16-medium
>         Attachments: YARN-5280.001.patch, YARN-5280.002.patch, YARN-5280.003.patch, YARN-5280.004.patch,
YARN-5280.005.patch, YARN-5280.006.patch, YARN-5280.007.patch, YARN-5280.008.patch, YARN-5280.patch,
YARNContainerSandbox.pdf
>
>
> YARN applications have the ability to perform privileged actions which have the potential
to add instability into the cluster. The Java Security Manager can be used to prevent users
from running privileged actions while still allowing their core data processing use cases.

> Introduce a YARN flag which will allow a Hadoop administrator to enable the Java Security
Manager for user code, while still providing complete permissions to core Hadoop libraries.



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