CDK-Klayers

Use Klayers within your CDK Stacks.

Install

pip install cdk-klayers

Usage (short version)

Simply use the Klayers Class within your CDK Stack. You will need to specify a runtime and region for it to work.

from cdk_klayers import Klayers

class MockStack(Stack):

    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
        super().__init__(scope, construct_id, **kwargs)

        runtime = aws_lambda.Runtime.PYTHON_3_12

        # Initialize Klayers 
        klayers = Klayers(
            self,
            python_version = runtime
            region = "ap-southeast-1"
        )
    
        # get the latest layer version for the requests package
        requests_layer = klayers.layer_version(self, "requests")

        lambda_function = aws_lambda.Function(
            self, 'HelloHandler',
            runtime=runtime,
            layers=[requests_layer],
            code=aws_lambda.Code.from_asset('lambda'),
            handler='hello.handler'
        )

Usage (long version)

This example shows a fully working CDK stack that deploys a single lambda function with 2 layers from Klayers. The region of the stack was inferred from the CDK Environment.

from aws_cdk import aws_lambda
from aws_cdk import App, Environment, Stack
from aws_cdk import Aws
from constructs import Construct

from cdk_klayers import Klayers

class MockStack(Stack):

    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
        super().__init__(scope, construct_id, **kwargs)

        runtime = aws_lambda.Runtime.PYTHON_3_12

        # Initialize Klayers 
        klayers = Klayers(
            self,
            python_version = runtime
        )
    
        # get the latest layer version for the requests package
        requests_layer = klayers.layer_version(self, "requests")
        idna_layer = klayers.layer_version(self, "idna", layer_version="2")

        lambda_function = aws_lambda.Function(
            self, 'HelloHandler',
            runtime=runtime,
            layers=[requests_layer, idna_layer],
            code=aws_lambda.Code.from_asset('lambda'),
            handler='hello.handler'
        )


app = App()
env = Environment(region="us-east-1")
mock_stack =MockStack(app, "test", env=env)

Other Notes

We're still in beta, this might change. Please raise an issue if you have any feedback.