Serverless Architecture with Node.js on AWS Lambda

1. Introduction

Serverless architecture allows developers to build and run applications without managing servers. AWS Lambda is a core component of this architecture, enabling the execution of code in response to events.

2. Key Concepts

3. Setup

To get started with AWS Lambda and Node.js, ensure you have an AWS account. Follow these steps:

1. Create an AWS account.
2. Navigate to the AWS Lambda console.
3. Set up AWS CLI on your local machine for deployment.

4. Creating a Lambda Function

Follow these steps to create your first Lambda function:

1. Open the AWS Lambda console and click on "Create function".
2. Select "Author from scratch".
3. Provide a name for your function and select Node.js as the runtime.
4. Define an execution role with basic Lambda permissions.
5. Click "Create function".

exports.handler = async (event) => {
    return {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
};
                

5. Best Practices

Consider these best practices when working with AWS Lambda:

• Keep functions small and focused on a single task.
• Use environment variables to manage configurations.
• Monitor and log function executions for debugging.
• Optimize cold start times by controlling deployment package size.

6. FAQ