Final answer:
To control which Amazon SQS queue an AWS Lambda function can poll, create an IAM role with a policy that grants permissions to access the specific SQS queue by specifying the Queue ARN, and configure the Lambda function to use this IAM role.
Step-by-step explanation:
To control which Amazon SQS queue an AWS Lambda function can poll, you need to set up the correct permissions using AWS Identity and Access Management (IAM). Here are the steps to configure access to a specific SQS queue for a Lambda function:
- Create an IAM role for your Lambda function.
- Attach a policy to the IAM role that grants permissions to access the specific SQS queue. This is done using an IAM policy statement that specifies the Queue ARN (Amazon Resource Name) and the actions such as sqs:ReceiveMessage, sqs:DeleteMessage, and sqs:GetQueueAttributes.
- Configure your Lambda function to use this IAM role.
- Optionally, define a Dead Letter Queue (DLQ) to handle the cases where messages cannot be processed.
By setting specific permissions in the IAM policy, you can control which SQS queue your Lambda function will be able to access and poll. Make sure the policy reflects the correct queue ARN to restrict access effectively.