S3 event notification to SQS

Question

I am an admin IAM user responsible for managing AWS resources. Recently, I enabled CloudTrail, SNS, SQS, and created an S3 bucket, all of which are prerequisite steps for integration account activity logs with Elasticsearch.

The creation of CloudTrail through an S3 bucket proceeded smoothly. However, when attempting to create an S# event notification to SQS, I encountered an error message stating, "Unknown Error: An unexpected error occurred. API responseUnable to validate the following destination configurations." Additionally, Amazon Q Analysis suggests that "The user likely does not have the necessary permissions to configure notifications for this S3 bucket. While the bucket itself may allow listing and accessing objects, permission to modify bucket properties and notifications is controlled separately."

Can you please help in identifying the root cause of this issue? Thanks a lot.

Accepted Answer

Hello.

You need to check the resource-based policy on the SQS side.  
Try setting the policy mentioned in the below document on SQS.  
https://docs.aws.amazon.com/AmazonS3/latest/userguide/grant-destinations-permissions-to-s3.html#grant-sns-sqs-permission-for-s3  
```
{
    "Version": "2012-10-17",
    "Id": "example-ID",
    "Statement": [
        {
            "Sid": "example-statement-ID",
            "Effect": "Allow",
            "Principal": {
                "Service": "s3.amazonaws.com"
            },
            "Action": [
                "SQS:SendMessage"
            ],
            "Resource": "arn:aws:sqs:Region:account-id:queue-name",
            "Condition": {
                "ArnLike": {
                    "aws:SourceArn": "arn:aws:s3:*:*:awsexamplebucket1"
                },
                "StringEquals": {
                    "aws:SourceAccount": "bucket-owner-account-id"
                }
            }
        }
    ]
}
```

Answer

Thanks so much!
I'm glad this helped. My problem was with `'aws:SourceAccount': 'bucket-owner-account-id'`, which I had completely missed out.

S3 event notification to SQS

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