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Eric Badger commented on YARN-7430: ----------------------------------- {quote} For users on LDAP, there is no good way to populate container with user and group information. {quote} Additionally, bind-mounting the /var/run/nscd will allow the container to use the host's ldap configuration to lookup users. That way, there won't be a cache miss everytime a new container is started up. We could setup each container to correctly use ldap, but that sounds like a waste because of all of the hits on the ldap server. That's why entering the container as a uid:gid pair will give you the username even if they don't exist in the image. Otherwise, the uid:gid pair won't have an associated username and the MRAppMaster will fail. This was discussed shortly in [YARN-4266|https://issues.apache.org/jira/browse/YARN-4266?focusedCommentId=16076756&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16076756] > User and Group mapping are incorrect in docker container > -------------------------------------------------------- > > Key: YARN-7430 > URL: https://issues.apache.org/jira/browse/YARN-7430 > Project: Hadoop YARN > Issue Type: Sub-task > Components: security, yarn > Affects Versions: 2.9.0, 3.0.0 > Reporter: Eric Yang > Assignee: Eric Yang > Priority: Blocker > Attachments: YARN-7430.001.patch > > > In YARN-4266, the recommendation was to use -u [uid]:[gid] numeric values to > enforce user and group for the running user. In YARN-6623, this translated > to --user=test --group-add=group1. The code no longer enforce group > correctly for launched process. > In addition, the implementation in YARN-6623 requires the user and group > information to exist in container to translate username and group to uid/gid. > For users on LDAP, there is no good way to populate container with user and > group information. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org