Deploy AWS Lambda functions with Serverless Framework and Node.js

Deploy test lambda - Edition #29

Hey, I'm Marco and welcome to my newsletter!

As a software engineer, I created this newsletter to share my first-hand knowledge of the development world. Each topic we will explore will provide valuable insights, with the goal of inspiring and helping all of you on your journey.

In this episode, you will learn how to deploy Lambda functions so that they can be invoked via an HTTP call using the AWS API Gateway.

You can download all the code shown directly from my Github repository: https://github.com/marcomoauro/hello-world-lambda

---

👋 Introduction

Serverless technology is very interesting because it allows you to focus on your product goals without worrying about managing servers. This makes the development process much easier and more enjoyable. I discovered the benefits of serverless computing thanks to a former colleague who introduced me to it.

I will guide you through the process of creating and deploying your first AWS Lambda function.

You will learn how to set up the function so it can be invoked through an HTTP call using AWS API Gateway. This will be a great starting point for understanding how serverless applications work and how you can leverage them to build scalable and efficient solutions.

---

👨‍💻 Let's implement together

You can download all the code shown directly from my Github repository: https://github.com/marcomoauro/hello-world-lambda

You will need the setup I showed here:

How to setup Serverless framework to deploy AWS Lambda, Queues and DynamoDB with Node.js

Initialize project

let's create a serverless project, to do so we can open the terminal and run the command:

sls // or "serveless"

we choose:

AWS / Node.js / Simple Function

and then:

Skip Adding An App

choose a project name, once done enter the project folder and initialize an NPM project with:

npm init -y

within the project you will see that there are two files:

• serverless.yml

• handler.js

serverless.yml

serverless.yml is a configuration file used in serverless applications.

It defines the functions, events, and resources for your serverless service. With this file, you can specify how your functions should be deployed, what triggers them, and what permissions they need. It simplifies managing and deploying serverless functions.

This is an example:

org: implementing
service: hello-world-lambda

provider:
  name: aws
  runtime: nodejs20.x
  region: eu-west-2

functions:
  hello:
    handler: handler.hello

the sections we find are: