Serverless Framework does not create SQS queue before Lambda with queue trigger

Question

Using Serverless Framework, how can I make my Lambda function depend on an SQS queue from the resources section as it is the trigger for the function itself?

In my serverless.yaml, I am defining a new queue and Lambda function.

Then, I want to use the queue as an event source (trigger) for my Lambda function.

I do that by creating the queue ARN manually:

functions:
  consumer:
    handler: App\Service\Consumer
    events:
      - sqs:
          arn:
            Fn::Join:
              - ':'
              - arn:aws:sqs
              - Ref: AWS::Region
              - Ref: AWS::AccountId
              - ${opt:stage}-skill-assigner

And creating the queue in resources:

resources:
  Resources:
    SkillAssignerQueue:
      Type: AWS::SQS::Queue
      Properties:
        QueueName: ${opt:stage}-skill-assigner

This works fine if I create the queue in a deployment prior to using it as a function trigger.

But if I try to deploy both of them, it fails with this error when it tries to create the event source mapping:

Invalid request provided: Error occurred while ReceiveMessage. SQS Error Code: AWS.SimpleQueueService.NonExistentQueue. SQS Error Message: The specified queue does not exist for this wsdl version.

Ermiya Eskandary · Accepted Answer · 2022-04-30 17:32:28Z

9

Fn::Join enables string concatenation which doesn't inform the Serverless Framework (SF) about the dependency of the function on the queue.

We visually can see that but it needs to be done declaratively.

To make this link obvious to SF, use Fn::GetAtt: instead.

It will inform Serverless Framework about the dependency of the Lambda function on the SQS queue.

This should work:

functions:
  consumer:
    handler: App\Service\Consumer
    events:
      - sqs:
          arn:
            Fn::GetAtt:
              - SkillAssignerQueue
              - Arn
resources:
  Resources:
    SkillAssignerQueue:
      Type: AWS::SQS::Queue
      Properties:
        QueueName: ${opt:stage}-skill-assigner

edited Apr 30, 2022 at 17:32

answered Apr 30, 2022 at 17:13

Ermiya Eskandary

24.4k4 gold badges58 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Gareth McCumskey · Accepted Answer · 2022-04-30 18:46:45Z

-1

The Serveless Framework can automatically create the queue for you. No need to define it in resources

answered Apr 30, 2022 at 18:46

Gareth McCumskey

1,5407 silver badges13 bronze badges

1 Comment

Ermiya Eskandary Over a year ago

SF docs, in bold:

Note: The sqs event will hook up your existing SQS Queue to a Lambda function. Serverless won't create a new queue for you.

Collectives™ on Stack Overflow

Serverless Framework does not create SQS queue before Lambda with queue trigger

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related