Serverless Deployment
Explore deploying NestJS applications to serverless platforms like AWS Lambda or Google Cloud Functions for cost-effective scaling.
Serverless Deployment is a free NestJS Enterprise Backend APIs lesson on CoddyKit — lesson 5 of 6. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the NestJS Enterprise Backend APIs learning path, one of 6 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Intro to Serverless Deployment
Welcome to serverless deployment! This strategy lets you build and run applications without managing servers.
Instead of provisioning VMs, you write code that runs in response to events, like an HTTP request.
The cloud provider (e.g., AWS, Google Cloud) handles all the server management for you.
Why Serverless for NestJS?
Deploying NestJS on serverless platforms offers compelling advantages, especially for APIs:
- Automatic Scaling: Your application scales instantly with demand, from zero to thousands of requests.
- Cost-Efficiency: You only pay for the compute time consumed by your code, not for idle servers.
- Reduced Operations: No server maintenance, patching, or scaling to worry about. Focus on your code!
Common Serverless Platforms
Several major cloud providers offer robust serverless computing services:
- AWS Lambda: The most popular choice, often used with API Gateway for HTTP endpoints.
- Google Cloud Functions: Google's offering, deeply integrated with the Google Cloud ecosystem.
- Azure Functions: Microsoft's solution for event-driven serverless applications.
We'll primarily focus on concepts applicable to AWS Lambda.
NestJS & Lambda: The Challenge
NestJS applications are typically long-running processes, constantly listening for requests. Serverless functions, however, are designed to be short-lived, executing only when triggered.
The challenge is to make NestJS's robust architecture fit into this 'function-as-a-service' model. We need a way to 'boot up' our NestJS app within the context of a single serverless invocation.
Adapting NestJS for Lambda
To run a NestJS app on AWS Lambda, we use an adapter. This adapter acts as a bridge, translating incoming Lambda events into a format NestJS understands (like an Express.js or Fastify request) and then translating NestJS's response back for Lambda.
Popular tools like @vendia/serverless-express (for Express) or @nestjs/platform-fastify with aws-lambda-fastify help achieve this.
Serverless Framework CLI
The Serverless Framework is a powerful CLI tool that simplifies deploying serverless applications to various providers.
It handles packaging your code, creating cloud resources (like Lambda functions and API Gateway endpoints), and managing deployments.
You can install it globally via npm:
npm install -g serverlessBasic `serverless.yml` Structure
The core of a Serverless Framework project is the serverless.yml file. This YAML configuration defines your service, provider, and functions.
Here's a simplified structure:
service: my-nestjs-api
provider:
name: aws
runtime: nodejs18.x
# ... other AWS configurations
functions:
api:
handler: dist/lambda.handler
events:
- http:
path: /{proxy+}
method: any
cors: trueThe NestJS Lambda Handler
This is the actual entry point for your Lambda function. It initializes your NestJS application and wraps it with an adapter.
The goal is to initialize NestJS only once (a 'warm start') to reduce latency on subsequent calls.
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ExpressAdapter } from '@nestjs/platform-express';
import * as express from 'express';
import * as serverlessExpress from '@vendia/serverless-express';
let cachedServer;
async function bootstrapServer() {
const expressApp = express();
const adapter = new ExpressAdapter(expressApp);
const app = await NestFactory.create(AppModule, adapter);
await app.init();
return serverlessExpress({ app: expressApp });
}
export const handler = async (event, context) => {
if (!cachedServer) {
cachedServer = await bootstrapServer();
}
return cachedServer(event, context);
};Deploying Your Serverless App
Once your serverless.yml and handler are configured, deploying your NestJS application is straightforward:
- Build: Compile your TypeScript code (e.g.,
npm run build). - Deploy: Run
serverless deployfrom your terminal. The CLI handles packaging and provisioning. - Test: The CLI will output your API Gateway endpoint, which you can use to test your deployed NestJS API.
Serverless Deployment Check
Which of the following are key benefits of deploying a NestJS API on a serverless platform like AWS Lambda?
Recap: Serverless NestJS
In this lesson, we explored how to deploy NestJS applications using serverless platforms like AWS Lambda.
You learned about the benefits (cost, scaling, reduced ops), the challenge of adapting NestJS for short-lived functions, and how the Serverless Framework and adapters help bridge this gap. This approach enables highly scalable and cost-efficient backend services.
Frequently asked questions
Is the “Serverless Deployment” lesson free?
Yes — the full text of “Serverless Deployment” is free to read here on the web, and the NestJS Enterprise Backend APIs course includes 6 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the NestJS Enterprise Backend APIs course, upgrade to CoddyKit PRO.
What will I learn in “Serverless Deployment”?
Explore deploying NestJS applications to serverless platforms like AWS Lambda or Google Cloud Functions for cost-effective scaling. You practise NestJS Enterprise Backend APIs with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start NestJS Enterprise Backend APIs?
No prior experience is required. NestJS Enterprise Backend APIs on CoddyKit is structured for beginners through advanced learners; this is — lesson 5 of 6, so you can start here or from the beginning and move at your own pace.
How long does the “Serverless Deployment” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this NestJS Enterprise Backend APIs lesson?
Yes. Every NestJS Enterprise Backend APIs lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.