Which solution will meet these requirements?
Apply a user policy in the other accounts to allow AWS Glue and Athena to access the .csv file.
Use S3 Select to restrict access to the .csv file. In AWS Glue Data Catalog, use S3 Select as the source of the AWS Glue database.
Define an AWS Glue Data Catalog resource policy in AWS Glue to grant cross-account S3 object access to the .csv file.
Grant AWS Glue access to Amazon S3 in a resource-based policy that specifies the organization as the principal.
Explanations:
A user policy in the other accounts is not sufficient to allow access to a specific file in another account’s S3 bucket. Access control for cross-account access needs to be managed via resource-based policies on the S3 bucket or AWS Glue.
S3 Select is not the appropriate solution for restricting access to a single file in an S3 bucket for cross-account access via AWS Glue and Athena. S3 Select is used for querying specific data in S3 objects but does not handle access control for cross-account scenarios.
An AWS Glue Data Catalog resource policy can be used to grant cross-account access to a specific S3 object, allowing users from other accounts to query the .csv file using AWS Glue and Athena while maintaining restrictions on other files.
Granting AWS Glue access to Amazon S3 using a resource-based policy specifying the organization as the principal allows access to all S3 objects within the organization, which doesn’t restrict access to the specific .csv file. It provides broader permissions than required.
I classify that the answer is:
Define an AWS Glue Data Catalog resource policy in AWS Glue to grant cross-account S3 object access to the .csv file.