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https://issues.apache.org/jira/browse/YARN-7935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16372322#comment-16372322
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Suma Shivaprasad edited comment on YARN-7935 at 2/22/18 2:08 AM:
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The current patch does not take care of "host" mode networking where the 
container's hostname should be set to the NM host's hostname. Will fix that and 
upload a patch.


was (Author: suma.shivaprasad):
The current patch does not take care of "host" mode networking where the 
container's hostname is set to the NM host's hostname. Will fix that and upload 
a patch.

> Expose container's hostname to applications running within the docker 
> container
> -------------------------------------------------------------------------------
>
>                 Key: YARN-7935
>                 URL: https://issues.apache.org/jira/browse/YARN-7935
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Suma Shivaprasad
>            Assignee: Suma Shivaprasad
>            Priority: Major
>         Attachments: YARN-7935.1.patch, YARN-7935.2.patch
>
>
> Some applications have a need to bind to the container's hostname (like 
> Spark) which is different from the NodeManager's hostname(NM_HOST which is 
> available as an env during container launch) when launched through Docker 
> runtime. The container's hostname can be exposed to applications via an env 
> CONTAINER_HOSTNAME. Another potential candidate is the container's IP but 
> this can be addressed in a separate jira.



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