Basic CRUD serverless operation on DynamoDB in Nodejs

This is a simple serverless CRUD application in nodejs.

Details

• Serverless Computing: AWS Lambda
• Database: AWS DynamoDB
• API: AWS API Gateway
• Serverless CLI: Serverless Framework

Prerequisites

1. AWS account
2. Nodejs installed in your machine
3. Install serverless npm install --global serverless
4. Basic understanding of nodejs and javascript syntax
5. Configure AWS credentials in serverless

Configuring AWS credentials in the serverless

Open IAM in your AWS account. Create a new user and give AdministratorAccess.
Download the Key pair csv. Save it properly, as if lost there is no way to retrieve it.

This is an educational project. For production, please configure the user access accordingly.

There are 2 ways configure the AWS credentials in the serverless framework.

1. Serverless CLI (local to the machine)

This will configure the AWS credentials to the local instance of the serverless CLI.

To configure run the below command with the correct access key and secret.

serverless config credentials --provider aws --key <ACCESS KEY> --secret <Secret Access key>

Check out this quick tutorial - Link

2. Serverless Web application

Create an account in the https://serverless.com.

Create a new app.

Select serverless framework template.
Enter the app name.

Copy the app properties

org: <org-name>
app: <app-name>

Open the serverless.yml and paste the app properties in the top.

org: <org-name>
app: <app-name>
service: basic-sls-crud-service-node

Open the terminal in the directory of the serverless project.

Login to serverless account from serverless CLI

serverless login

Connect with AWS

Open the app setting from the serverless dashboard. There is a 3 dots menu in the app card.

Go to stages > Select default > Connect AWS

You can create multiple stages according to the application environment.

Deploy the application

To deploy the application run the below command

serverless deploy

It will create all the API routes configured in the serverless.yml.

Test the endpoints using the curl command or Postman.

References:

To learn more on serverless check out my latest tutorials.

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