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From "Robert Kanter (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5280) Allow YARN containers to run with Java Security Manager
Date Sat, 11 Feb 2017 02:09:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15862157#comment-15862157
] 

Robert Kanter commented on YARN-5280:
-------------------------------------

The 006 patch looks mostly good to me.  My only remaining concern is with the regexes in {{NMContainerPolicyUtils}}.
 It would be good to have some tests that specifically verify the regexes with some reasonable
positive and negative cases.  

I'm also wondering if there's some way a malicious user could trick it (I might not be following
the regexes correctly here so feel free to let me know if something like this can't actually
happen).  For example, if we're removing "java", and you have "/evil/jajavava", it's going
to become "/evil/java".



> 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.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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