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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2198) Remove the need to run NodeManager as privileged account for Windows Secure Container Executor
Date Wed, 15 Oct 2014 06:41:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172064#comment-14172064
] 

Hadoop QA commented on YARN-2198:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12674933/YARN-2198.12.patch
  against trunk revision 1220bb7.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-YARN-Build/5402//console

This message is automatically generated.

> Remove the need to run NodeManager as privileged account for Windows Secure Container
Executor
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-2198
>                 URL: https://issues.apache.org/jira/browse/YARN-2198
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>              Labels: security, windows
>         Attachments: .YARN-2198.delta.10.patch, YARN-2198.1.patch, YARN-2198.11.patch,
YARN-2198.12.patch, YARN-2198.2.patch, YARN-2198.3.patch, YARN-2198.delta.4.patch, YARN-2198.delta.5.patch,
YARN-2198.delta.6.patch, YARN-2198.delta.7.patch, YARN-2198.separation.patch, YARN-2198.trunk.10.patch,
YARN-2198.trunk.4.patch, YARN-2198.trunk.5.patch, YARN-2198.trunk.6.patch, YARN-2198.trunk.8.patch,
YARN-2198.trunk.9.patch
>
>
> YARN-1972 introduces a Secure Windows Container Executor. However this executor requires
the process launching the container to be LocalSystem or a member of the a local Administrators
group. Since the process in question is the NodeManager, the requirement translates to the
entire NM to run as a privileged account, a very large surface area to review and protect.
> This proposal is to move the privileged operations into a dedicated NT service. The NM
can run as a low privilege account and communicate with the privileged NT service when it
needs to launch a container. This would reduce the surface exposed to the high privileges.

> There has to exist a secure, authenticated and authorized channel of communication between
the NM and the privileged NT service. Possible alternatives are a new TCP endpoint, Java RPC
etc. My proposal though would be to use Windows LPC (Local Procedure Calls), which is a Windows
platform specific inter-process communication channel that satisfies all requirements and
is easy to deploy. The privileged NT service would register and listen on an LPC port (NtCreatePort,
NtListenPort). The NM would use JNI to interop with libwinutils which would host the LPC client
code. The client would connect to the LPC port (NtConnectPort) and send a message requesting
a container launch (NtRequestWaitReplyPort). LPC provides authentication and the privileged
NT service can use authorization API (AuthZ) to validate the caller.



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