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https://issues.apache.org/jira/browse/YARN-7729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16329456#comment-16329456
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Billie Rinaldi commented on YARN-7729:
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Thanks for the review, [~shaneku...@gmail.com]! I am working on a patch that
addresses your suggestions. It seems like I will need to wait until after
YARN-7717 is committed to be able to use the same check for true that is
introduced in that patch. Regarding the formatting change in
TestDockerContainerRuntime, I added that because the old formatting produced 2
checkstyle errors for the first patch I submitted.
> Add support for setting the PID namespace mode
> ----------------------------------------------
>
> Key: YARN-7729
> URL: https://issues.apache.org/jira/browse/YARN-7729
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Reporter: Shane Kumpf
> Assignee: Billie Rinaldi
> Priority: Major
> Attachments: YARN-7729.001.patch, YARN-7729.002.patch
>
>
> Docker has support for allowing containers to share the PID namespace with
> the host or other containers via the {{docker run --pid}} flag.
> There are a number of use cases where this is desirable:
> * Monitoring tools running in containers that need access to the host level
> PIDs.
> * Debug containers that can attach to another container to run strace, gdb,
> etc.
> * Testing Docker on YARN in a container, where the docker socket is bind
> mounted.
> Enabling this feature should be considered privileged as it exposes host
> details inside the container.
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