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sam local invoke with pre-built image #7993

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sam local invoke with pre-built image#7993
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blocked/close-if-inactiveBlocked for >14 days with no response, will be closed if still inactive after 7 days

Description

@hikouki-gumo
hikouki-gumo
opened on Apr 18, 2025

Description

My function uses dependencies from a private Github repository and I have to --mount feature of BuildKit to build Docker image, but SAM does not support BuildKit. Then I have to build image separately first and then define that pre-built image in field ImageUri of template.yaml.

Issue happens when I test on local, SAM must build on fly image to run function -> It can not build image, then can not invoke local.

Is there any way to invoke sam local for this use case? Or SAM does not support that?

AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31

Resources:
  FormDataExtractionFunction:
    # No MetaData definition
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: "my-lambda-function"
      PackageType: Image
      ImageUri: "library/test-lambda:latest" # Specify local image

...

Activity

  1. hikouki-gumo
    added
    stage/needs-triageAutomatically applied to new issues and PRs, indicating they haven't been looked at.
    on Apr 18, 2025

  2. royassis commented on Apr 27, 2025

    @royassis
    royassis
    on Apr 27, 2025

    Not 100% sure, but try editing the AWS::Serverless::Function resource in your template.yaml:

    Remove

    Metadata:
  Dockerfile: Dockerfile
  DockerContext: ./functions/<somefunc>

    Set you local prebuilt image to

    ImageUri: myimage:latest

    **update
    Sadly you won't be able to run and debug it using vscode/pycharm aws toolkit, without the metadata section.

  3. vicheey commented on Jun 23, 2025

    @vicheey
    vicheey
    on Jun 23, 2025
    Contributor

    Do you mind providing a sample image function any step to reproduce?

  4. reedham-aws
    added
    blocked/close-if-inactiveBlocked for >14 days with no response, will be closed if still inactive after 7 days
    and removed
    stage/needs-triageAutomatically applied to new issues and PRs, indicating they haven't been looked at.
    on May 12, 2026

  5. reedham-aws commented on May 28, 2026

    @reedham-aws
    reedham-aws
    on May 28, 2026
    Contributor

    Closing this issue as inactive, feel free to reopen if you have any more questions.

  6. reedham-aws
    closed this as completedon May 28, 2026

  7. github-actions commented on May 28, 2026

    @github-actions
    github-actionsBot
    on May 28, 2026 – with GitHub Actions
    Contributor

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