Lesson 9. Deploy 1. Deploy Backend

Let's start with the backend deploy.

We use Serverless framework.

> npm i serverless-lambda-nestjs
> npm i -D serverless serverless-layers @types/aws-lambda

apps/hero-api/src/main.ts

import { Logger } from '@nestjs/common'
import { NestFactory } from '@nestjs/core'
import { APIGatewayProxyHandler } from 'aws-lambda'
import { ServerlessNestjsApplicationFactory } from 'serverless-lambda-nestjs'
import { AppModule } from './app/app.module'
const globalPrefix = 'api'
export async function bootstrap() {
  const app = await NestFactory.create(AppModule)
  app.setGlobalPrefix('api')
  const port = process.env.PORT || 3333
  await app.listen(port, () => {
    Logger.log('Listening at http://localhost:' + port + '/' + globalPrefix)
  })
}
// Run Nestjs application locally
if (process.env.NX_CLI_SET) {
  bootstrap()
}
// Run Nestjs application in AWS Lambda
export const handler: APIGatewayProxyHandler = async (event, context) => {
  const app = new ServerlessNestjsApplicationFactory<AppModule>(
    AppModule,
    {
      // NestFactory.create's option object
      cors: {
        origin: '*',
        allowedHeaders: 'Origin, X-Requested-With, Content-Type, Accept',
      },
    },
    (app) => {
      app.enableCors()
      app.setGlobalPrefix(globalPrefix)
      return app
    }
  )
  const result = await app.run(event, context)
  return result
}

apps/hero-api/serverless.yml

service: nx-hero-api
frameworkVersion: '>=2.0.0'
custom:
  prune:
    automatic: true
    number: 3
  serverless-layers:
    dependenciesPath: ./apps/hero-api/package.json
provider:
  name: aws
  runtime: nodejs12.x
  region: eu-central-1
  deploymentBucket: {{bucket-name}}
  apiGateway:
    shouldStartNameWithService: true
plugins:
  - serverless-layers
package:
  individually: true
  include:
    - dist/apps/hero-api/**
  exclude:
    - '**'
functions:
  main:
    handler: dist/apps/hero-api/main.handler
    events:
      - http:
          cors: true
          path: '/'
          method: any
      - http:
          cors: true
          path: '{proxy+}'
          method: any

apps/hero-api/package.json

{
  "name": "hero-api",
  "dependencies": {
    "@nestjs/common": "^7.0.0",
    "@nestjs/core": "^7.0.0",
    "@nestjs/platform-express": "^7.0.0",
    "reflect-metadata": "^0.1.13",
    "rxjs": "~6.6.3",
    "serverless-lambda-nestjs": "0.0.2",
    "tslib": "^2.0.0"
  },
  "devDependencies": {}
}

> aws s3 mb s3://{{bucket-name}} --region=eu-central-1

workspace.json

...
"hero-api": {
    ...
    "deploy": {
        "executor": "@nrwl/workspace:run-commands",
        "options": {
        "parallel": false,
        "commands": [
                {
                "command": "npm run nx run hero-api:build:production"
                },
                {
                "command": "sls deploy --config=apps/hero-api/serverless.yml --stage=prod"
                }
            ]
        }
    }
}
...

> npm run nx run hero-api:deploy

.gitignore

...
# serverless
.serverless