Rule: Lambda functions should be configured with a dead-letter queue

Rule Description:

Troubleshooting Steps:

2. 1.
   Check if a dead-letter queue is already configured for the Lambda function.
4. 2.
   Verify if the Lambda function is generating any failed events that need to be captured.
6. 3.
   Ensure that you have the necessary permissions to configure a dead-letter queue for the Lambda function.

Necessary Codes:

Step-by-Step Guide for Remediation:

2. 1.
   Install and configure the AWS CLI on your local machine if you haven't already.
4. 2.
   Open the command prompt or terminal.
6. 3.
   To configure a dead-letter queue for an existing Lambda function, use the

   update-function-configuration

   command with the

   --dead-letter-config

   parameter. Replace

   FUNCTION_NAME

   with the actual name of your Lambda function and

   QUEUE_ARN

   with the ARN (Amazon Resource Name) of the dead-letter queue.

aws lambda update-function-configuration --function-name FUNCTION_NAME --dead-letter-config TargetArn=QUEUE_ARN

2. 1.
   If you need to create a dead-letter queue before configuring it for the Lambda function, use the

   create-queue

   command with the

   --queue-name

   parameter to provide a name for the dead-letter queue.

aws sqs create-queue --queue-name my-dead-letter-queue

2. 1.
   Once the dead-letter queue is created, you can retrieve its ARN using the

   get-queue-url

   command.

aws sqs get-queue-url --queue-name my-dead-letter-queue

2. 1.
   Make a note of the dead-letter queue ARN.
4. 2.
   Use the

   update-function-configuration

   command from step 3 to configure the dead-letter queue for your Lambda function, replacing

   FUNCTION_NAME

   with the actual name of your Lambda function and

   QUEUE_ARN

   with the dead-letter queue ARN obtained in step 5.

aws lambda update-function-configuration --function-name FUNCTION_NAME --dead-letter-config TargetArn=QUEUE_ARN

2. 1.
   Verify that the dead-letter queue is successfully configured by checking the Lambda function's configuration details. Use the

   get-function-configuration

   command with the

   --function-name

   parameter.

aws lambda get-function-configuration --function-name FUNCTION_NAME

2. 1.
   Look for the

   DeadLetterConfig

   section in the command output and ensure that the

   TargetArn

   matches the ARN of the dead-letter queue.