2.2 Create Lambda Functions

Here we will create the Lambda functions used in this workshop.

Function to receive input from Slack

Step 1: Access the Lambda console

• Go to: https://console.aws.amazon.com/lambda
• Click the “Create function” button

Step 2: Enter function creation details

If you don’t see the role, make sure you created it in the same Region and the IAM role is ready.

Step 3: Add simple handler code for testing

After creation, AWS will take you to the code editor screen. You can test with the following Python code for the Slack route:

import json

def lambda_handler(event, context):
    print("Event:", event)

    return {
        'statusCode': 200,
        'body': json.dumps({
            'text': 'Hello from Lambda! Your input has been received.',
            'response_type': 'in_channel'
        }),
        'headers': {
            'Content-Type': 'application/json'
        }
    }

To avoid errors with Slack slash commands, you need to return JSON with both text and response_type.

Step 4: Save and deploy

• Click Deploy
• Note the Lambda ARN if needed