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From "Eric Badger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7197) Add support for a volume blacklist for docker containers
Date Fri, 15 Sep 2017 13:56:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167890#comment-16167890
] 

Eric Badger commented on YARN-7197:
-----------------------------------

{quote}
For example, if a system admin would like to allow mounting of /mnt/hdfs/user/$
\{USER\}
but not /mnt/hdfs/user/yarn using nfs gateway. 
{quote}
Ok that makes sense from a usability point of view. I think this should be identified in a
comment/in the docs so that it's clear what the intentions of both the whitelist and blacklist
are. Most situations should be handled via the whitelist and won't have to touch the blacklist
at all

> Add support for a volume blacklist for docker containers
> --------------------------------------------------------
>
>                 Key: YARN-7197
>                 URL: https://issues.apache.org/jira/browse/YARN-7197
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Shane Kumpf
>
> Docker supports bind mounting host directories into containers. Work is underway to allow
admins to configure a whilelist of volume mounts. While this is a much needed and useful feature,
it opens the door for misconfiguration that may lead to users being able to compromise or
crash the system. 
> One example would be allowing users to mount /run from a host running systemd, and then
running systemd in that container, rendering the host mostly unusable.
> This issue is to add support for a default blacklist. The default blacklist would be
where we put files and directories that if mounted into a container, are likely to have negative
consequences. Users are encouraged not to remove items from the default blacklist, but may
do so if necessary.



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