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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (YARN-4595) Add support for configurable read-only mounts
Date Wed, 27 Apr 2016 10:15:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259917#comment-15259917

Varun Vasudev edited comment on YARN-4595 at 4/27/16 10:14 AM:

Thanks for the explanation [~billie.rinaldi]. Just to summarize - the latest patch 
# allows users to only mount files and directories from the localized resources into the docker
# in case of files, it does not allow symbolic links to be mounted into the docker container
# in case of directories, even if they have symbolic links pointing to directories outside
the YARN local directories, since the target of the symlink is not mounted into the container,
there is no access violation we need to take care of.

Is my understanding correct?

was (Author: vvasudev):
Thanks for the explanation [~billie.rinaldi]. 

> 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, YARN-4595.3.patch, YARN-4595.4.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.
> Due to permissions and user concerns, for this ticket we will require the mounts to be
resources that are in the distributed cache.

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