Unveiling the Mystery: Decoding the Dilemma of Lambda Deployment in Private Subnets

In this demonstration, we see why we are getting a timeout error when deploying a lambda functions to a public subnet.

I will deploy a VPC with an Internet gateway to demonstrate this error I am not going to deploy any resources in a private subnet, so for the moment I will not create a NAT gateway. After deploying, my VPC belongs as below.

I will deploy a sample Lambda function with role created by default in the vpc-1 in public subnet and I added necessary lambda layers.

Below is the code:

import requests

def lambda_handler(event, context):
    url = 'https://swapi.dev/api/people/4/'
    response = requests.get(url)
    
    if response.status_code == 200:
        return response.json()
    else:
        return {
            'statusCode': response.status_code,
            'body': 'Failed to fetch data from SWAPI'
        }

General configuration

VPC configuration: