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https://issues.apache.org/jira/browse/YARN-7197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16223344#comment-16223344
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Eric Yang commented on YARN-7197:
---------------------------------
Btw, docker doesn't support double mount like:
{code}
docker run -it -v /mnt/hdfs/user:/home -v /tmp/empty:/home/yarn
{code}
If {{/mnt/hdfs/user}} is already mounted, then yarn will show up. We have to
trust that yarn directory permission is setup correctly. Bind mount a
directory with blank directory will not solve any problem to hide /home/yarn
directory. Filesystem ACL is the only safe guard. It's not possible to make a
subdirectory disappear.
> 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
> Assignee: Eric Yang
> Attachments: YARN-7197.001.patch, YARN-7197.002.patch
>
>
> 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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