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https://issues.apache.org/jira/browse/YARN-1253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13784667#comment-13784667
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Alejandro Abdelnur edited comment on YARN-1253 at 10/3/13 12:18 AM:
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Created YARN-1267 to refactor and decouple cgroups from LCE.
Thinking a bit, I agree with Arun about leaving this JIRA out of
branch-2.1-beta, only trunk/branch-2.
I've reviewed and tested the patch already, I'll wait till Friday noon for
comments from other reviewers before committing.
was (Author: tucu00):
Create YARN-1267 to refactor and decouple cgroups from LCE.
Thinking a bit, I agree with Arun about leaving this JIRA out of
branch-2.1-beta, only trunk/branch-2.
I've reviewed and tested the patch already, I'll wait till Friday noon for
comments from other reviewers before committing.
> Changes to LinuxContainerExecutor to run containers as a single dedicated
> user in non-secure mode
> -------------------------------------------------------------------------------------------------
>
> Key: YARN-1253
> URL: https://issues.apache.org/jira/browse/YARN-1253
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: nodemanager
> Affects Versions: 2.1.0-beta
> Reporter: Alejandro Abdelnur
> Assignee: Roman Shaposhnik
> Priority: Blocker
> Attachments: YARN-1253.patch.txt
>
>
> When using cgroups we require LCE to be configured in the cluster to start
> containers.
> When LCE starts containers as the user that submitted the job. While this
> works correctly in a secure setup, in an un-secure setup this presents a
> couple issues:
> * LCE requires all Hadoop users submitting jobs to be Unix users in all nodes
> * Because users can impersonate other users, any user would have access to
> any local file of other users
> Particularly, the second issue is not desirable as a user could get access to
> ssh keys of other users in the nodes or if there are NFS mounts, get to other
> users data outside of the cluster.
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