Create and execute a lambda

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

Prerequisites:

• AWS account

By the end of this article, 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 my travel blog.

     • Change the Timeout from 3 seconds to 10 minutes.

       

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"
     }

4. Click Create.
5. Click the Test button in the upper right-hand corner again.

6. Scroll up to see the output in the Execution Results pane.