GCP IAM Policy Not Allowing Service Account Access to GCS Bucket with 'Permission Denied' scenarios
I've searched everywhere and can't find a clear answer. I'm working with a frustrating scenario with IAM permissions on Google Cloud Platform. I have a service account that needs to access a Google Cloud Storage (GCS) bucket, but I'm getting a 'Permission Denied' behavior when I try to list the objects in the bucket. The service account has been assigned the 'Storage Object Viewer' role, but the behavior continues. Here’s the code snippet I'm using to list the objects in the bucket: ```python from google.cloud import storage def list_gcs_objects(bucket_name): storage_client = storage.Client() bucket = storage_client.get_bucket(bucket_name) blobs = bucket.list_blobs() for blob in blobs: print(blob.name) list_gcs_objects('my-bucket-name') ``` I've verified that the service account is correctly set up and that the key file is being used. The bucket permissions are configured to allow access to the service account, but I still see the following behavior: ``` google.auth.exceptions.DefaultCredentialsError: The provided credentials do not have permission to access the specified bucket. ``` I've also checked the bucket policy and confirmed that the service account is listed with the correct permissions. I even tried to use the GCS console to manually add the service account as a member and granted it the 'Storage Object Viewer' role, but the scenario remains. Is there something I'm missing in the IAM policy configuration, or is it possible that there's a more restrictive organization policy in place that's preventing access? I'm working on a CLI tool that needs to handle this. Is there a better approach?