NestJS on AWS Lambda

nestjs 프로젝트 생성

https://docs.nestjs.com/first-steps

$ npm i -g @nestjs/cli
$ nest new serverless-nestjs

nestjs 프로젝트 확인

$ cd serverless-nestjs
$ npm run start

Connect http://localhost:3000/

serverless 프로젝트 생성

https://www.serverless.com/framework/docs/providers/openwhisk/guide/installation

$ cd serverless-nestjs
$ npm install -g serverless
$ mv .gitignore .gitignore_nestjs
$ serverless create --template aws-nodejs
$ mv .gitignore .gitignore_serverlessjs
$ cp .gitignore_nestjs .gitignore

1. merge .gitignore

2. replace handler.js --> src/lambda.ts

   • https://github.com/youngkiu/serverless-nestjs/blob/main/src/lambda.ts

     import { configure as serverlessExpress } from '@vendia/serverless-express';
     import { NestFactory } from '@nestjs/core';
     import { AppModule } from './app.module';
     
     let cachedServer;
     
     export const handler = async (event, context) => {
       if (!cachedServer) {
         const nestApp = await NestFactory.create(AppModule);
         await nestApp.init();
         cachedServer = serverlessExpress({ app: nestApp.getHttpAdapter().getInstance() });
       }
     
       return cachedServer(event, context);
     }

3. update serverless.yml

   • https://github.com/youngkiu/serverless-nestjs/blob/main/serverless.yml

     ...
     functions:
       hello:
         handler: dist/lambda.handler
     #    The following are a few example events you can configure
     #    NOTE: Please make sure to change your handler code to work with those events
     #    Check the event documentation for details
         events:
           - httpApi:
               path: /{any+}
               method: any
     ...

$ npm i -D serverless-jetpack
$ npm i @vendia/serverless-express
$ npm run build
$ serverless deploy

Deploying serverless-nestjs to stage dev (ap-northeast-2)

✔ Service deployed to stack serverless-nestjs-dev (116s)

endpoint: ANY - https://65re6n90z8.execute-api.ap-northeast-2.amazonaws.com/{any+}
functions:
  hello: serverless-nestjs-dev-hello (4.5 MB)

Need a better logging experience than CloudWatch? Try our Dev Mode in console: run "serverless --console"
$ curl  https://65re6n90z8.execute-api.ap-northeast-2.amazonaws.com/                                         Hello World!%   

serverless 프로젝트 제거

$ serverless remove
Removing serverless-nestjs from stage dev (ap-northeast-2)

✔ Service serverless-nestjs has been successfully removed (26s)

Ref)

• https://dev.to/aws-builders/deploy-a-nestjs-api-to-aws-lambda-with-serverless-framework-4poo
• https://nishabe.medium.com/nestjs-serverless-lambda-aws-in-shortest-steps-e914300faed5
• https://blog.theodo.com/2019/06/deploy-a-nestjs-app-in-5-minutes-with-serverless-framework/