Access denied when calling Amazon Q business BatchPutDocument API. Please check your data source IAM role.

Question

Hi, I am trying out Amazon Q and using the Q retriever. I have successfully added a S3 bucket as the data source. As I try to sync the files in the S3, I received error:
"Access denied when calling Amazon Q business BatchPutDocument API. Please check your data source IAM role."

The IAM role for data source it is using has the following permissions policies. What else can be missing? Please advise. 
- AmazonKendraFullAccess
- AmazonS3FullAccess

Trusted Entities:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": [
                    "lambda.amazonaws.com",
                    "kendra.amazonaws.com",
                    "qbusiness.amazonaws.com"
                ]
            },
            "Action": "sts:AssumeRole"
        }
    ]
}

Accepted Answer

Hi there!

Since you are using the native Q retriever you will need to allow `BatchPutDocument` on your Q index, like below:

```
    {
      "Sid": "AllowsAmazonQToIngestDocuments",
      "Effect": "Allow",
      "Action": [
        "qbusiness:BatchPutDocument",
        "qbusiness:BatchDeleteDocument"
      ],
      "Resource": "arn:aws:qbusiness:{{region}}:{{source_account}}:application/{{application_id}}/index/{{index_id}}"
    },
```

You can check out the full IAM permission needed in the docs at https://docs.aws.amazon.com/amazonq/latest/business-use-dg/create-s3-datasource-iam-role.html as you will also have to add permissions for the Principal Store APIs in addition to the above and access to your S3 bucket. There are also examples for other configurations.

Answer

Since the error is pointing to BatchPutDocument API, I followed this https://docs.aws.amazon.com/kendra/latest/dg/iam-roles.html

Here is the policy I added to the role. However, I am still getting the same error. Thanks for your pointers.
{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Action": [
				"s3:GetObject"
			],
			"Resource": [
				"arn:aws:s3:::xxxx/*"
			],
			"Effect": "Allow"
		},
		{
			"Action": [
				"s3:ListBucket"
			],
			"Resource": [
				"arn:aws:s3:::xxxx"
			],
			"Effect": "Allow"
		},
		{
			"Effect": "Allow",
			"Action": [
				"kendra:BatchPutDocument",
				"kendra:BatchDeleteDocument"
			],
			"Resource": [
				"arn:aws:kendra:us-east-2:12345678:index/*"
			]
		}
	]
}

Access denied when calling Amazon Q business BatchPutDocument API. Please check your data source IAM role.

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