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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5280) Allow YARN containers to run with Java Security Manager
Date Mon, 14 Nov 2016 17:11:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15664430#comment-15664430
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Varun Vasudev commented on YARN-5280:
-------------------------------------

bq. 1) Currently the ContainerRuntime.prepareContainer doesn't appear to have any usages in
the standard execution of any containers. LinuxContainerExecutor.writeLaunchEnv is passed
all of the information necessary to prepare the container runtime, and by overriding the method
any modifications made to the run command will be persisted to the launch file. 

I did not realise that. cc [~sidharta-s] who wrote that code - it looks like we don't call
prepareContainer anywhere; where did you originally mean for it to be used?

> 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.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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