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https://issues.apache.org/jira/browse/YARN-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhankun Tang updated YARN-4266:
-------------------------------
    Attachment: 
YARN-4266_Allow_whitelisted_users_to_disable_user_re-mapping_v2.pdf

Based on testings, update the proposal

> Allow whitelisted users to disable user re-mapping/squashing when launching 
> docker containers
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-4266
>                 URL: https://issues.apache.org/jira/browse/YARN-4266
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Sidharta Seethana
>            Assignee: Zhankun Tang
>         Attachments: 
> YARN-4266_Allow_whitelisted_users_to_disable_user_re-mapping.pdf, 
> YARN-4266_Allow_whitelisted_users_to_disable_user_re-mapping_v2.pdf
>
>
> Docker provides a mechanism (the --user switch) that enables us to specify 
> the user the container processes should run as. We use this mechanism today 
> when launching docker containers . In non-secure mode, we run the docker 
> container based on 
> `yarn.nodemanager.linux-container-executor.nonsecure-mode.local-user` and in 
> secure mode, as the submitting user. However, this mechanism breaks down with 
> a large number of 'pre-created' images which don't necessarily have the users 
> available within the image. Examples of such images include shared images 
> that need to be used by multiple users. We need a way in which we can allow a 
> pre-defined set of users to run containers based on existing images, without 
> using the --user switch. There are some implications of disabling this user 
> squashing that we'll need to work through : log aggregation, artifact 
> deletion etc.,



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