Why serverless patterns matter in GCP - See It in Action

Why Serverless Patterns Matter

📖 Scenario: You are working for a small startup that wants to build a simple web application. The team wants to use cloud services that automatically handle scaling and reduce the need to manage servers. You will learn how to set up a basic serverless function and understand why using serverless patterns is helpful.

🎯 Goal: Build a simple serverless function on Google Cloud Platform (GCP) that responds to HTTP requests. Learn how serverless patterns help by automatically scaling and reducing infrastructure management.

📋 What You'll Learn

Create a basic HTTP Cloud Function in GCP

Add a configuration variable to control a greeting message

Implement the function logic to return the greeting message

Deploy the function with the correct entry point and runtime

💡 Why This Matters

🌍 Real World

Serverless functions let developers focus on code without managing servers. They automatically scale with demand, saving time and cost.

💼 Career

Understanding serverless patterns is essential for cloud engineers and developers working with modern cloud platforms like GCP, AWS, or Azure.

1

Create the initial Cloud Function code

Create a Python function called hello_world that takes request as a parameter and returns the string 'Hello, Serverless!'.

GCP

# Define the hello_world function that returns 'Hello, Serverless!'
# Your code here

Need a hint?

Define a function named hello_world with one parameter request. Return the exact string 'Hello, Serverless!'.

2

Add a greeting message configuration variable

Add a variable called GREETING and set it to the string 'Welcome to Serverless Patterns' above the hello_world function.

GCP

GREETING = ''  # Set the greeting message here

def hello_world(request):
    return 'Hello, Serverless!'
# Your code here

Need a hint?

Define the variable GREETING before the function with the exact string value.

3

Use the greeting variable in the function

Change the hello_world function to return the value of the GREETING variable instead of the fixed string.

GCP

GREETING = 'Welcome to Serverless Patterns'

def hello_world(request):
    # Return the GREETING variable
    
# Your code here

Need a hint?

Replace the return statement to return the GREETING variable.

4

Add deployment configuration for the Cloud Function

Add a comment at the top specifying the runtime as python39 and the entry point as hello_world to prepare for deployment.

GCP

# Runtime: python39
# Entry point: hello_world

GREETING = 'Welcome to Serverless Patterns'

def hello_world(request):
    return GREETING
# Your code here

Need a hint?

Add comments at the top exactly as shown to indicate runtime and entry point.