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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4595) Add support for configurable read-only mounts
Date Mon, 04 Apr 2016 21:46:25 GMT

    [ https://issues.apache.org/jira/browse/YARN-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15225121#comment-15225121
] 

Allen Wittenauer commented on YARN-4595:
----------------------------------------

bq. If we're thinking of the same symlinks,

We're not.  If I create an archive (tar, whatever) that contains symlinks and those get unpacked
as part of the task localization, IIRC I should be able to access the target of the symlink
if I mount the symlink in the container.  Using this method, I can access all sorts of fun
things on the host from inside the container.

> Add support for configurable read-only mounts
> ---------------------------------------------
>
>                 Key: YARN-4595
>                 URL: https://issues.apache.org/jira/browse/YARN-4595
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>         Attachments: YARN-4595.1.patch, YARN-4595.2.patch
>
>
> Mounting files or directories from the host is one way of passing configuration and other
information into a docker container.  We could allow the user to set a list of mounts in the
environment of ContainerLaunchContext (e.g. /dir1:/targetdir1,/dir2:/targetdir2).  These would
be mounted read-only to the specified target locations.



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