Awesome

nextjs-vercel-aws-cdk-example

Companion project of the article at https://dev.to/vvo/coding-the-jamstack-missing-parts-databases-crons-background-jobs-1bpj

This is a Next.js example coupled with AWS services to provide:

• database (RDS)
• cron jobs (EventBridge + Lambda)
• background jobs (SNS + Lambda)

The goal is to have Next.js being deployed on Vercel, with resources being deployed on AWS via AWS Cloud Development Kit. The AWS stack is described and deployed via a single JavaScript file (infra/ExampleStack.js) thanks to AWS CDK's infrastructure as code (IaC) features.

This example provides local tools to replicate the AWS services in development mode.

Requirements

• Node.js via nvm: https://github.com/nvm-sh/nvm#installing-and-updating
• Yarn: https://classic.yarnpkg.com/en/docs/install#alternatives-stable
• An AWS account: https://portal.aws.amazon.com/billing/signup
• Installed and configured AWS CLI: https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html
• Docker Desktop for ease of running a local database
• overmind for ease of running multiple local services

How to use

1. Fork this repository, add it to your Vercel projects, deploy it
2. Clone the repository locally and run

yarn
yarn cdk deploy # first run can be long

This will deploy the services to AWS.

3. Add necessary env variables to your Vercel project:

You need to add SECRET_AWS_ACCESS_KEY_ID, SECRET_AWS_SECRET_ACCESS_KEY and SECRET_AWS_REGION to Vercel, see https://vercel.com/blog/environment-variables-ui on how to do it.

1. Verify it's working:

You can check in CloudWatch logs at https://console.aws.amazon.com/cloudwatch/home that your functions are called:

• every 5 minutes for jobs/checkTwitter.js
• when you click on the "Generate Pdf" button in your production Vercel application for jobs/generatePdf.js.

Local development

In local development, all you have to do is:

overmind start

By reading the Procfile This will start:

• The Next.js app in development mode
• The PostgreSQL database via Docker
• The cron jobs defined in cron-jobs.js

Tips and docs

• Once your database is deployed, you can get its endpoint and credentials via https://console.aws.amazon.com/rds/home and https://console.aws.amazon.com/secretsmanager/home
• If your stack is in an unstable situation (cannot deploy or destroy), then go to https://console.aws.amazon.com/cloudformation and delete it manually.
• CDK API: https://docs.aws.amazon.com/cdk/api/latest/docs/aws-construct-library.html
• CDK guide: https://docs.aws.amazon.com/cdk/latest/guide/home.html
• CDK command line: https://docs.aws.amazon.com/cdk/latest/guide/cli.html