[jira] [Commented] (MESOS-9475) Task launched with non-root user cannot write to existing sub-dirs/files in persistent volume

["Qian Zhang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-9475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16719918#comment-16719918 ] 

Qian Zhang commented on MESOS-9475:
-----------------------------------

Actually the task has the write permission to the root dir of the PV since we change the owner of the PV's root dir to the task user in `filesystem/linux` isolator, but we just do the `chown` for the root dir rather than recursively for all the sub-dirs/files in the PV, so that's why the task cannot write to the sub-dir which is still owned by root.

> Task launched with non-root user cannot write to existing sub-dirs/files in persistent volume
> ---------------------------------------------------------------------------------------------
>
>                 Key: MESOS-9475
>                 URL: https://issues.apache.org/jira/browse/MESOS-9475
>             Project: Mesos
>          Issue Type: Bug
>            Reporter: Qian Zhang
>            Priority: Major
>
> Reproduce steps:
> 1. Create a PV via `/master/create-volumes`.
> 2. Log into the agent host with root and manually create a sub-dir under the PV.
> 3. Launch a task with a non-root user to touch a file under that sub-dir in the PV.
> The task failed because it has no write permission to the sub-dir.



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