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Alejandro Abdelnur commented on YARN-1253: ------------------------------------------ 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. -- This message was sent by Atlassian JIRA (v6.1#6144)