AWS CloudFormation Lambda 模块分享

Question

I want to develop two serverless lambda functions that share some common module. How can I describe this in the CloudFormation template?

desired folders structure:

src/
    lambda1
    lambda2
    module

desired template syntax:

Type: AWS::Serverless::Function
Properties:
    CodeUri: ./src/lambda1

this syntax doesn't include the module code into the deployment of the lambda and therefore I get a Runtime.ImportModuleError:

Other discarded options are:

option.1

Properties:
    CodeUri: ./src/

but this includes the code of both lambda1 and lambda2 into the deployment of lambda1

option.2

duplicate the folder of module into both lambda1 and lambda2, but this duplicates the code

What is best approach to achieve this?

Answer 1

What is best approach to achieve this?

Use lambda layers . In CloudFomration this is AWS::Lambda::LayerVersion .