Demo AWS Lambda using NodeJS

Demonstration of Amazon Web Services (AWS) Lambda function setup, using simple NodeJS code.

Sign up

• Sign up for AWS at https://aws.amazon.com

• Sign up for AWS Lamba at https://aws.amazon.com/lambda/

Create a function

Go to the Lamba dashboard at https://console.aws.amazon.com/lambda/home

• Click "Create a Lambda function"

Select blueprint:

• Blueprints are sample configurations of event sources and Lambda functions. There are blueprints for APIs, microservices, data sources, third-party integrations, and more.

• Click "Blank Function" because we will create our own function.

Configure triggers:

• Triggers invoke our function, and can come from many AWS areas, such as API Gateway, Alexa, CloudWatch, S3, SNS, etc.

• Click "Next" to skip this step.

Configure function:

• Name: myDemoFunction

• Description: My demo function is great!

• Runtime: Node.js 4.3

Lambda function code:

• Code entry type: Edit code inline

• The edit box shows:

  exports.handler = (event, context, callback) => { // TODO implement callback(null, 'Hello from Lambda'); };

Lambda function handler and role:

• Handler: index.handler

• Role: Create a new role from template(s)

• Role name: myDemoRole

• Policy templates: Simple microservices permissions

Advanced settings:

• Use the defaults

Review:

• Click "Create function"

• You see: Congratulations! Your Lambda function "myDemoFunction" has been successfully created.

• Your browser now shows the function page.

• Notice the URL goes to the function page: https://console.aws.amazon.com/lambda/home?region=us-east-1#/functions/myDemoFunction?tab=code

Test

If you're following this demo, then you're already on the function page, and you see a big blue "Test" button.

• Click "Test"

Input test event:

• Sample event template: Hello World (default)

• Use the default input source code, which has some keys and values.

• Click "Save and test"

Results:

• The results area shows:

  • Execution result: succeeded (logs)
  • "Hello from Lambda"

• The summary area shows:

  • Code SHA-256
  • Request ID
  • Duration
  • Billed duration
  • Resources configured
  • Max memory used

• The log output shows:

  • START RequestId
  • END RequestId
  • REPORT RequestId