Using custom aws lambda runtimes with asp net core


ASP.NET is a popular programming language used for building web . It provides a powerful framework for developing dynamic and interactive websites. One of the key features of ASP.NET is its ability to integrate with various technologies and services, including AWS Lambda.

What is AWS Lambda?

AWS Lambda is a serverless computing service provided by Amazon Web Services. It allows you to run your code provisioning or managing servers. With AWS Lambda, you can execute your code in response to , such as to data in an Amazon S3 bucket or a new record being inserted into a DynamoDB table.

Using AWS Lambda with ASP.NET Core

ASP.NET Core is a cross-platform framework for building modern web applications. It is designed to be lightweight and modular, making it a perfect fit for serverless architectures. By ASP.NET Core with AWS Lambda, you can create and cost-effective web applications.

To use custom AWS Lambda runtimes with ASP.NET Core, you need to follow these steps:

Step 1: Create a Lambda Function

The first step is to create a Lambda function in the AWS Management Console. You can choose the runtime as “Custom Runtime” and specify the handler as the entry point of your ASP.NET Core application.

using Amazon.Lambda.AspNetCoreServer;

public class LambdaEntryPoint : APIGatewayProxyFunction
    protected override void Init(IWebHostBuilder builder)

Step 2: Configure the Lambda Function

Next, you need to configure the Lambda function to use the custom runtime. You can do this by specifying the runtime as “provided” in the function's configuration.

    "runtime": "provided",
    "handler": "LambdaEntryPoint::FunctionHandlerAsync"

Step 3: Build and Deploy the ASP.NET Core Application

Now, you need to build and deploy your ASP.NET Core application. You can use tools like AWS Toolkit for Visual Studio or AWS CLI to package and deploy your application to AWS Lambda.

Step 4: Test the Lambda Function

Once the deployment is complete, you can test the Lambda function by invoking it with sample input data. You can use the AWS Management Console or AWS CLI to invoke the function and its output.


Using custom AWS Lambda runtimes with ASP.NET Core allows you to leverage the benefits of serverless computing while building scalable and cost-effective web applications. By the steps outlined in this article, you can integrate ASP.NET Core with AWS Lambda and take advantage of the powerful features provided by both technologies.

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