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https://issues.apache.org/jira/browse/MESOS-6396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15576156#comment-15576156
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Till Toenshoff commented on MESOS-6396:
---------------------------------------

I wish - unfortunately that one only mutates the Task environment.

see 
https://github.com/apache/mesos/blob/master/src/slave/containerizer/docker.cpp#L229

> Hooks should allow sandbox dependent environment variables.
> -----------------------------------------------------------
>
>                 Key: MESOS-6396
>                 URL: https://issues.apache.org/jira/browse/MESOS-6396
>             Project: Mesos
>          Issue Type: Bug
>            Reporter: Till Toenshoff
>
> The {{slaveExecutorEnvironmentDecorator}} hook is the only one that allows 
> mutating the executor environment of a Docker container. That callback has no 
> means of getting the location of the sandbox. That in turn means that it is 
> not possible for a hook to create files and respective environment variables 
> listing  paths within the sandbox for the executor to access.



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