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From "Shane Kumpf (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7197) Add support for a volume blacklist for docker containers
Date Fri, 15 Sep 2017 11:40:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167752#comment-16167752
] 

Shane Kumpf commented on YARN-7197:
-----------------------------------

[~ebadger] - Thanks for the feedback. I had similar concerns, but after having this occur
in a real world scenario, I believe there is value. This would help make sure an admin has
to think twice before enabling a known dangerous mount. I'm confident a lazy admin will whitelist
/ and come complain when the system gets broken beyond all repair. :)

> 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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