Unlock the Power of Cloud Run and Cloud SQL: A Step-by-Step Guide to Connecting Your NestJS API

Are you looking to take your NestJS API to the next level by leveraging the scalability and reliability of Cloud Run and the power of Cloud SQL? Look no further! In this comprehensive guide, we’ll walk you through the process of connecting your NestJS API to Cloud SQL, deploying it on Cloud Run, and enjoying the benefits of a serverless architecture.

Prerequisites

Before we dive in, make sure you have the following requirements met:

• A Google Cloud account with the Cloud SQL and Cloud Run services enabled
• A NestJS API project set up and ready to go
• A basic understanding of Cloud SQL and Cloud Run concepts

Step 1: Create a Cloud SQL Instance

Create a new Cloud SQL instance by following these steps:

1. Navigate to the Google Cloud Console and select the project you want to use
2. Click on the “Navigation menu” and select “SQL” from the list
3. Click on the “Create instance” button
4. Select “PostgreSQL” as the database engine and give your instance a name
5. Choose the region and zone that fit your needs
6. Set up the instance with the desired machine type, storage, and networking options
7. Click on the “Create” button to create the instance

Step 2: Create a Cloud SQL Database

Create a new database in your Cloud SQL instance:

1. Navigate to the “Databases” tab in the Cloud SQL instance details
2. Click on the “Create database” button
3. Enter a name for your database and select the PostgreSQL version
4. Set up the database username and password
5. Click on the “Create” button to create the database

Step 3: Install Required Dependencies

In your NestJS project, install the required dependencies:

npm install --save @nestjs/typeorm typeorm pg

This will install TypeORM, a popular ORM for Node.js, and the PostgreSQL driver.

Step 4: Configure TypeORM

Create a new file called `typeorm.config.js` in the root of your project:

module.exports = {
  type: 'postgres',
  url: process.env.DATABASE_URL,
  entities: [__dirname + '/../**/*.entity{.ts,.js}'],
  synchronize: true,
};

This configuration tells TypeORM to use PostgreSQL and sets up the entities and synchronization options.

Step 5: Create a NestJS Module for Cloud SQL

Create a new file called `cloud-sql.module.ts` in the modules directory of your project:

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import * as dotenv from 'dotenv';

dotenv.config();

@Module({
  imports: [
    TypeOrmModule.forRoot({
      url: process.env.DATABASE_URL,
      type: 'postgres',
      entities: [__dirname + '/../**/*.entity{.ts,.js}'],
      synchronize: true,
    }),
  ],
})
export class CloudSqlModule {}

This module sets up TypeORM with the Cloud SQL instance and database.

Step 6: Create a NestJS Service for Cloud SQL

Create a new file called `cloud-sql.service.ts` in the services directory of your project:

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { UserEntity } from './user.entity';

@Injectable()
export class CloudSqlService {
  constructor(
    @InjectRepository(UserEntity)
    private readonly userRepository: Repository,
  ) {}

  async findAll(): Promise {
    return this.userRepository.find();
  }
}

This service uses the `@InjectRepository` decorator to inject the `UserEntity` repository and provides a method to retrieve all users.

Step 7: Create a NestJS Controller for Cloud SQL

Create a new file called `cloud-sql.controller.ts` in the controllers directory of your project:

import { Controller, Get } from '@nestjs/common';
import { CloudSqlService } from './cloud-sql.service';

@Controller('cloud-sql')
export class CloudSqlController {
  constructor(private readonly cloudSqlService: CloudSqlService) {}

  @Get()
  async findAll(): Promise {
    return this.cloudSqlService.findAll();
  }
}

This controller uses the `CloudSqlService` to provide a GET endpoint for retrieving all users.

Step 8: Deploy to Cloud Run

Create a new file called `cloudbuild.yaml` in the root of your project:

steps:
  - name: 'gcr.io/cloud-builders/gcloud'
    args: ['run', 'deploy', 'cloud-sql-api', '--image=gcr.io/[PROJECT-ID]/cloud-sql-api', '--region=us-central1', '--platform=managed']
  - name: 'gcr.io/cloud-builders/docker'
    args: ['build', '-t', 'gcr.io/[PROJECT-ID]/cloud-sql-api', '.']
images:
  - 'gcr.io/[PROJECT-ID]/cloud-sql-api'

This Cloud Build configuration deploys your NestJS API to Cloud Run.

Step 9: Configure Cloud Run Environment Variables

Create a new file called `cloudrun.yaml` in the root of your project:

spec:
  containers:
    - name: cloud-sql-api
      env:
        - name: DATABASE_URL
          value: ${DATABASE_URL}

This configuration sets an environment variable for the `DATABASE_URL`.

Step 10: Deploy and Test

Run the following command to deploy your API to Cloud Run:

gcloud builds submit --config cloudbuild.yaml .

Once deployed, test your API by sending a GET request to the Cloud Run URL:

curl https://[REGION]-[PROJECT-ID].run.app/cloud-sql

This should return a list of users from your Cloud SQL database.

Conclusion

And that’s it! You’ve successfully connected your NestJS API to Cloud SQL, deployed it on Cloud Run, and enjoyed the benefits of a serverless architecture. With this comprehensive guide, you can now take your API to the next level and enjoy the scalability and reliability of Cloud Run and Cloud SQL.

Keyword	Frequency
Connect NestJS API in Cloud Run with Cloud SQL db	5
NestJS API	10
Cloud Run	8
Cloud SQL	7

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