How I develop AWS Lambda functions locally using a test-first approach. In this article I share an approach I use regularly to develop AWS Lambda functions (and other serverless projects) locally. It assumes a basic familiarity with AWS Lambda or a similar “serverless” service.
In this article I share an approach I use regularly to develop AWS Lambda functions (and other serverless projects) locally. It assumes a basic familiarity with AWS Lambda or a similar “serverless” service. The article will first introduce the approach, and then walk through a short example making use of it.
I’ve frequently seen other developers use the “guess and check” approach to AWS Lambda function development: Write some code; deploy and wait a long time; invoke the function; check the result; repeat. This isn’t that surprising given how many guides to developing AWS Lambda functions have you repeatedly deploying or running a command line to invoke it. It’s hardly controversial to say that deploying to check whether code is working as expected sucks big time. It’s also unnecessary once you start treating your Lambda functions as just that — functions, which take simple input and return an output.
AWS Lambda functions are loosely like doing functional programming, albeit rarely pure. I suppose this was the premise in AWS naming the service “Lambda”. Though the functions are hardly anonymous. No matter. When combined with AWS API Gateway, Lambda functions do a very functional-esque thing: map an input to an output. In principle, given some specific input, a Lambda function will always return some specific output that is somehow correlated, or dependent on the input. This makes for a tester’s wet dream. Input goes into a box and out comes result which is generally the same each time!
If you are here, you may have a pretty good knowledge of how to use AWS CDK for defining cloud infrastructure in code and provisioning it through AWS. So let’s get started on how to grant permission to your lambda function to access the resources in another AWS account.
Adding Code to AWS Lambda, Lambda Layers, and Lambda Extensions Using Docker. With Docker, we have three ways to add code to Lambda that isn’t directly part of our Lambda function. Try to AWS Lambda, Lambda Layers, and Lambda Extensions Using Docker.
AWS Lambda Destination and Lambda Console Changes. In this video, we go over the recent AWS Lambda console changes for Lambda Destination for Asynchronous invocation. Demo included
Mattias Andersson is here with your weekly dose of AWS news and updates! This week, we take a look at AWS Proton as it moves into general availability, bringing support for multi-account infrastructure and IAM condition context keys. Plus, we’ll run through another quick-fire round of service updates including announcements for AWS Lambda, EKS pods running on Fargate, and Amazon SageMaker.
In this video tutorial, we'll learn What is serverless computing in AWS? Serverless is more than AWS Lambda! DO NOT MISS!!!