Event Bridge Dead Letter Config

Serverless Framework
1

Hey there,
The serverless docs of Event Bridge here do not mention how to set up a dead letter queues and retry attempts. I was hoping the configuration would look something like below but it did not work.
Is there a way to add DLQ on a Lambda invoked by Event Bus?

myLambda:
    handler:  ./src/functions/destinationLambda/index.handler
    events:
      - eventBridge:
          eventBus: arn:aws:events:region:accountID:event-bus/busname
          deadLetterConfig: 
            arn: arn:aws:sqs:region:accountID:sqs-name
          pattern:
            source: 
              - ${self:custom.sourceNameForEventBus}
2 Likes
2

I need to do the same thing. I assume this isn’t supported since there has been zero activity/response to your question. :frowning:

3

Yeah, they are still trying to add this feature. In the end, I just wrote cloudformation in my serverless.yml to add Dead letter queue

4

Hello, I’m trying to do exactly the same thing, do you have any example of how you did by any chance?

Thanks in advance.

5

You can write something like this in your serverless.yml’s resources section,
Note: lambda:InvokeFunction is necessary permission to add

    CustomBusRule: 
        Type: AWS::Events::Rule
        Properties: 
            EventBusName: ${self:custom.eventBusName}
            EventPattern: 
                source: 
                    - my-source
            State: "ENABLED"
            Targets: 
            - 
                Arn: 
                    Fn::GetAtt: 
                        - "<lambdaName>LambdaFunction"
                        - "Arn"
                Id: "random"
                DeadLetterConfig:
                    Arn: ${self:custom.sqsARN}
    PermissionInvokeLambda: 
        Type: AWS::Lambda::Permission
        Properties: 
            FunctionName: !Ref "<lambdaName>LambdaFunction"
            Action: "lambda:InvokeFunction"
            Principal: "events.amazonaws.com"
            SourceArn: 
                Fn::GetAtt: 
                    - "CustomBusRule"
                    - "Arn"

Other option that I use is to call the api putTargets by writing a custom plugin