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From "Artem Harutyunyan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MESOS-4291) fs::enter(rootfs) does not work if 'rootfs' is read only.
Date Mon, 01 Feb 2016 20:19:41 GMT

     [ https://issues.apache.org/jira/browse/MESOS-4291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Artem Harutyunyan updated MESOS-4291:
-------------------------------------
    Sprint: Mesosphere Sprint 26, Mesosphere Sprint 27, Mesosphere Sprint 28  (was: Mesosphere
Sprint 26, Mesosphere Sprint 27)

> fs::enter(rootfs) does not work if 'rootfs' is read only.
> ---------------------------------------------------------
>
>                 Key: MESOS-4291
>                 URL: https://issues.apache.org/jira/browse/MESOS-4291
>             Project: Mesos
>          Issue Type: Bug
>            Reporter: Jie Yu
>            Assignee: Jie Yu
>              Labels: mesosphere, unified-containerizer-mvp
>
> I noticed this when I was testing the unified containerizer with the bind mount backend
and no volumes.
> The current implementation of fs::enter will put the old root under /tmp/._old_root_.XXXXXX
in the new rootfs. It assumes that /tmp is writable in the new rootfs, but this might not
be true, especially if the bind mount backend is used.
> To solve the problem, what we can do is to mount tmpfs to /tmp in the new rootfs and
umount it after pivot_root.



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