[jira] [Commented] (MESOS-5081) Posix disk isolator allows unrestricted sandbox disk usage if the executor/task doesn't specify disk resource

["Charles Allen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-5081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15550653#comment-15550653 ] 

Charles Allen commented on MESOS-5081:
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Does fixing this mean that things that are kind of dumb about disk (like Spark) won't be able to run on slaves which specify disk resources?

> Posix disk isolator allows unrestricted sandbox disk usage if the executor/task doesn't specify disk resource
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: MESOS-5081
>                 URL: https://issues.apache.org/jira/browse/MESOS-5081
>             Project: Mesos
>          Issue Type: Bug
>          Components: containerization
>            Reporter: Yan Xu
>              Labels: mesosphere
>
> This is the case even if {{flags.enforce_container_disk_quota}} is true. When a task/executor doesn't specify a disk resource, it still gets to write to the container sandbox. However the posix disk isolator doesn't limit it.
> Even though tasks always have access to the sandbox, it should be able to write zero bytes if it doesn't have any {{disk}} resource (it can still touch files). This likely will cause tasks to immediately fail due to stdout/stderr/executor download, etc. but should be the correct behavior (when {{flags.enforce_container_disk_quota}} is true).



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