14. Lab - Create and execute a Lambda

# Compute Power in the Cloud

In this hands-on exercise, you will write your first Lambda function using Node.js.

Prerequisites:

• AWS account

Topics Covered:

By the end of this lab, you will be able to:

• Author a Lambda function using Node.js via the console
• Test a Lambda function via the console

Steps:

1. Create a Lambda Function
   • On the AWS Management Console page, type lambda in the Find Services box and then select Lambda.
   • Click the “Create function” button and select Author from scratch.
   • Enter a Function name and select Node.js 8.10 as the runtime.
   • For Permission, click Choose or create an execution role, and select Create a new role with basic Lambda permissions.
   • Click Create function.
2. Modify a Lambda Function
   • Scroll down to the code for the Lambda function.
   • Replace the code on Line 5 with the statement below:

body: JSON.stringify('Hello ' + event.key1 + ' from Lambda!'),

* Click the `Save` button in the upper right-hand corner.
* Scroll down to the `Basic Settings` section.
    * For the Description, enter `Udacity Function`.
    * Change the `Timeout` from 3 seconds to 10 minutes.
    * Click the `Save`button in the upper right-hand corner.

3. Test a Lambda Function
   • Click on the Test button in the upper right-hand corner.
   • Ensure the Event template is Hello World.
   • For the Event name enter TestEvent
     Important: The name cannot contain spaces.
   • Update the JSON to the statement below, replacing the statement with your name.

{
  "key1": "Place your name here"
}

• Click Create.
• Click the Test button in the upper right-hand corner again.
• Scroll up to see the output in the Execution Results pane.
• Review your results in the window.

Congratulations on writing your first Lambda function!