EMR Serverless Custom Image local validation failure

Question

Hi.

I have set up an EMR Serverless application and i am using  my custom image. I've configured everything properly.

Next, I've created a custom image according to the official docs:
https://docs.aws.amazon.com/emr/latest/EMR-Serverless-UserGuide/application-custom-image.html

However, I am stuck at the test image locally validation part of the docs as i am continuously getting the error when i am running this command
"$ amazon-emr-serverless-image validate-image -r emr-6.14.0 -t spark -i 933661958818.dkr.ecr.ap-south-1.amazonaws.com/emr-custom:latest/@digest"

OUTPUT:-
Amazon EMR Serverless - Image CLI
Version: 0.0.1
... Checking if docker cli is installed
[ERROR] docker cli doesn't exist but is required.

I am using windows machine and i have already installed docker desktop and verified that docker is running but again and again it throws the same error.

Please advise a possible solution.

Thanks

Petro_K · Answer

Hi, on Windows machine you need to execute this tool in some kind of virtual linux env like [WSL ](https://learn.microsoft.com/en-us/windows/wsl/install).  
Validation tool is using simple helper [script](https://github.com/awslabs/amazon-emr-serverless-image-cli/blob/main/amazon_emr_serverless_image_cli/helper/docker_util/docker_helper.py) to verify if docker cli is installed. It uses shutil library with "which" method, which is equivalent of running "which" command on Linux systems.

Petro_K · Answer

You need to make sure docker is integrated with WSL.  So if you manually run `which docker ` command it should return version.  You mentioned you have Docker Desktop, please check [this](https://learn.microsoft.com/en-us/windows/wsl/tutorials/wsl-containers) guide in WSL documentation how to integrate them.

EMR Serverless Custom Image local validation failure

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