[jira] [Commented] (BEAM-5440) Add option to mount a directory inside SDK harness containers

["Thomas Weise (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16622049#comment-16622049 ] 

Thomas Weise commented on BEAM-5440:
------------------------------------

I think that's a good idea that will help users during development. It may also be of interest just to access certain files that are present in a host environment in general. Although developers will probably prefer to use the process environment option :)

> Add option to mount a directory inside SDK harness containers
> -------------------------------------------------------------
>
>                 Key: BEAM-5440
>                 URL: https://issues.apache.org/jira/browse/BEAM-5440
>             Project: Beam
>          Issue Type: New Feature
>          Components: java-fn-execution
>            Reporter: Maximilian Michels
>            Priority: Major
>             Fix For: 2.8.0
>
>
> While experimenting with the Python SDK locally, I found it inconvenient that I can't mount a host directory to the Docker containers, i.e. the results of a Write inside a container remain in the container. For local testing, users may want to mount a host directory.
> Since the {{Environment}} now carries explicit environment information, we could a) add volume args to the {{DockerPayload}}, or b) provide a general Docker arguments field.



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