Creating Lambda Function on AWS Management Console for Cloud and DevOps Engineers

📝Introduction

In this blog post, we will cover a simple and intro hands-on lab, where you will author a Lambda function using the Python programming language in the AWS console. You will also review logs generated by CloudWatch.

📝Log in to the AWS Management Console

Using your credentials, make sure you're using the right Region. In my case, I chose us-east-1.

📝Create Lambda Function

Navigate to the Lambda tab and click Create Function.

Make sure the Author from scratch option at the top is selected, and then use the following settings:

Function name: Type <your_function_name>

Runtime: Select the latest version of Python(3.10).

Expand the Change default execution role section, verify that Create a new role with basic Lambda permissions is selected and then click Create function.

📝Setting and Executing Lambda Function

Once the function has been created, scroll down to the Code tab.

Under Code source, select lambda_function.py.

Replace the existing sample code with the following:

import json

def lambda_handler(event, context):
    message = 'Hello {} {}! Keep being awesome!'.format(event['first_name'], event['last_name'])  

    #print to CloudWatch logs
    print(message)

    return {
        'message' : message
    }

Click Deploy.

Now, select Test > Configure test event.

Add your Event name and in the Event JSON box, replace the sample code with the following:

{
  "first_name": "Your First Name Here",
  "last_name": "Your Last Name Here"
}

Update the code to use your first and last name then click Format JSON to standardize the code in JSON format.

Click Save and Test and check the result printout.

📝Verify CloudWatch Captured Function Logs

Click on the Monitor tab and the View CloudWatch logs button and a new screen will launch to check if it has captured the Function logs.

Under Log Streams, click the most recent log stream.

Review the log. You should see a similar printout as you did in the execution results.

Congratulations — you've completed this hands-on lab covering the basics of creating a Lambda Function from the AWS Management Console.

Thank you for reading. I hope you were able to understand and learn something helpful from my blog.

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