[jira] [Created] (YARN-4266) Allow whitelisted users to disable user re-mapping/squashing when launching docker containers

["Sidharta Seethana (JIRA)" <ji...@apache.org>]

Sidharta Seethana created YARN-4266:
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             Summary: 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
            Reporter: Sidharta Seethana
            Assignee: Sidharta Seethana


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. 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. 



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