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

["Kyle Weaver (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17531467#comment-17531467 ] 

Kyle Weaver commented on BEAM-5440:
-----------------------------------

[~altay] I don't think Dataflow is in scope for this FR. Specifically we are targeting local portable runners so users can test their containers before running on Dataflow, such as the instructions here: https://cloud.google.com/dataflow/docs/guides/using-custom-containers#basic_testing_with_portablerunner

> 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, sdk-java-core
>            Reporter: Maximilian Michels
>            Priority: P3
>              Labels: Clarified, portability, portability-flink
>          Time Spent: 4h 20m
>  Remaining Estimate: 0h
>
> 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 input must already be in the container and the results of a Write remain inside the container. For local testing, users may want to mount a host directory.
> Since BEAM-5288 the {{Environment}} 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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