Full source code can be found at https://github.com/mgjam/blog/tree/master/1-final.
Project Bootstrap
For the purpose of this guide, lets have following solution structure
cdk folder will contain the TypeScript CDK scripts. src folder will contain .NET Lambda code.
To install CDK CLI, follow instructions on https://docs.aws.amazon.com/cdk/latest/guide/getting_started.html. To create a CDK app, execute
Generated template is ready to be extended for your stack needs.
To install AWS Lambda .NET Core CLI, follow instructions on https://docs.aws.amazon.com/lambda/latest/dg/lambda-dotnet-coreclr-deployment-package.html. To create a Lambda project, execute
By now the solution should like the one at https://github.com/mgjam/blog/tree/master/20191021-1-solution-structure
Lambda Publish
Publishing of lambda generates dll files which can be then referenced by the CDK script. To publish your created lambda, execute
The command will publish your lambda function with Release configuration into your folder.
Publish output path for .NET Core 2.1 app will be
..\app\src\app\bin\Release\netcoreapp2.1\publish\
CDK
Lambda package needs to be installed to define your lambda function resource. List of available packages can be found at https://docs.aws.amazon.com/cdk/api/latest/docs/aws-construct-library.html. To install lambda package, execute
Now you can open your cdk-stack.ts file to define your resources
code property needs to be set to the lambda publish folder path.
handler property needs to be set in format of <dllName>::<namespace>.<className>::<classMethod>.
Remember to run npm run build to compile your TypeScript into JavaScript unless you have code watch on.
Before being able to deploy your stack, CDK needs to have it's boostrapping done. To do so, execute
Now you can deploy your stack into AWS by executing
You can now log into your AWS Lambda management console and test deployed lambda.
Closing Notes
The CDK configuration is very simplified just to show key concepts of referencing .NET Lambda in CDK scripts.
Additional information can be found at
https://docs.aws.amazon.com/cdk/api/latest/docs/aws-lambda-readme.html