Using Amazon CloudFormation with layers - Amazon Lambda
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Using Amazon CloudFormation with layers

You can use Amazon CloudFormation to create a layer and associate the layer with your Lambda function. The following example template creates a layer named my-lambda-layer and attaches the layer to the Lambda function using the Layers property.

--- Description: CloudFormation Template for Lambda Function with Lambda Layer Resources: MyLambdaLayer: Type: AWS::Lambda::LayerVersion Properties: LayerName: my-lambda-layer Description: My Lambda Layer Content: S3Bucket: my-bucket S3Key: CompatibleRuntimes: - python3.7 - python3.8 - python3.9 MyLambdaFunction: Type: AWS::Lambda::Function Properties: FunctionName: my-lambda-function Runtime: python3.9 Handler: index.handler Timeout: 10 Policies: - AWSLambdaBasicExecutionRole - AWSLambda_ReadOnlyAccess - AWSXrayWriteOnlyAccess Layers: - !Ref MyLambdaLayer