Cloud Functions generations (1st vs 2nd) in GCP - Hands-On Comparison

Understanding Cloud Functions Generations (1st vs 2nd)

📖 Scenario: You are working as a cloud engineer for a small company that wants to automate simple tasks using Google Cloud Functions. Your manager asked you to create two versions of a Cloud Function: one using the 1st generation and another using the 2nd generation. This will help the team understand the differences and benefits of each generation.

🎯 Goal: Create two Cloud Function deployment configurations: one for a 1st generation Cloud Function and one for a 2nd generation Cloud Function. You will define the basic setup for each, including runtime, trigger, and region, to see how the configurations differ.

📋 What You'll Learn

Create a 1st generation Cloud Function configuration with Node.js 16 runtime

Create a 2nd generation Cloud Function configuration with Node.js 16 runtime

Use HTTP trigger for both functions

Set the region to us-central1 for both functions

Specify the service account for the 2nd generation function

💡 Why This Matters

🌍 Real World

Cloud Functions are used to run small pieces of code in response to events without managing servers. Knowing the differences between 1st and 2nd generation helps choose the right setup for your needs.

💼 Career

Cloud engineers and developers often configure and deploy Cloud Functions. Understanding generation differences is key to optimizing performance, security, and cost.

1

Create 1st Generation Cloud Function Configuration

Create a dictionary called cloud_function_1st_gen with these exact keys and values: 'name' set to 'my-function-1st-gen', 'runtime' set to 'nodejs16', 'trigger' set to 'http', and 'region' set to 'us-central1'.

GCP

# Your code here

Hint

Remember to create a dictionary with the exact keys and values as specified.

2

Add Service Account Configuration for 2nd Generation

Create a dictionary called cloud_function_2nd_gen with the same keys and values as cloud_function_1st_gen but add a new key 'service_account' with the value '[e-mail]'.

GCP

cloud_function_1st_gen = {
    'name': 'my-function-1st-gen',
    'runtime': 'nodejs16',
    'trigger': 'http',
    'region': 'us-central1'
}
# Your code here

Hint

Copy the 1st generation dictionary and add the service account key with the exact value.

3

Add Generation Type to Both Configurations

Add a new key 'generation' with value '1st' to cloud_function_1st_gen and '2nd' to cloud_function_2nd_gen.

GCP

cloud_function_1st_gen = {
    'name': 'my-function-1st-gen',
    'runtime': 'nodejs16',
    'trigger': 'http',
    'region': 'us-central1'
}

cloud_function_2nd_gen = {
    'name': 'my-function-2nd-gen',
    'runtime': 'nodejs16',
    'trigger': 'http',
    'region': 'us-central1',
    'service_account': '[e-mail]'
}
# Your code here

Hint

Add the generation key with the exact string values to each dictionary.

4

Complete Configuration with Memory and Timeout for 2nd Generation

Add two new keys to cloud_function_2nd_gen: 'memory' set to '512MB' and 'timeout' set to '60s'.

GCP

cloud_function_1st_gen = {
    'name': 'my-function-1st-gen',
    'runtime': 'nodejs16',
    'trigger': 'http',
    'region': 'us-central1',
    'generation': '1st'
}

cloud_function_2nd_gen = {
    'name': 'my-function-2nd-gen',
    'runtime': 'nodejs16',
    'trigger': 'http',
    'region': 'us-central1',
    'service_account': '[e-mail]',
    'generation': '2nd'
}
# Your code here

Hint

Add memory and timeout keys with the exact values to the 2nd generation dictionary.

Practice

1. Which generation of Cloud Functions supports automatic scaling with more control over CPU and memory allocation?

easy

A. 2nd generation

B. 1st generation

C. Both generations support the same scaling features

D. Neither generation supports automatic scaling

Solution

1. Step 1: Understand scaling features of 1st gen

   1st gen Cloud Functions scale automatically but have limited control over CPU and memory.

2. Step 2: Understand scaling features of 2nd gen

   2nd gen Cloud Functions provide automatic scaling with more control over CPU and memory allocation.

3. Final Answer:

   2nd generation -> Option A

4. Quick Check:

   More control and scaling = 2nd generation [OK]

Hint: Remember: 2nd gen adds more control and features [OK]

Common Mistakes:

• Thinking 1st gen has advanced scaling controls
• Assuming both generations have identical features
• Believing scaling is manual in both generations

2. Which command correctly deploys a Cloud Function using the 2nd generation environment?

easy

A. gcloud functions create my-function --gen=2

B. gcloud functions deploy my-function --gen=2

C. gcloud deploy function my-function --gen=2

D. gcloud functions deploy my-function --generation=2

Solution

1. Step 1: Recall correct gcloud syntax for generation

   The correct flag to specify generation is --gen=2 with gcloud functions deploy.

2. Step 2: Check command structure

   Only gcloud functions deploy my-function --gen=2 uses the correct command and flag syntax.

3. Final Answer:

   gcloud functions deploy my-function --gen=2 -> Option B

4. Quick Check:

   Use --gen=2 with deploy command [OK]

Hint: Use --gen=2 with 'gcloud functions deploy' [OK]

Common Mistakes:

• Using --generation=2 instead of --gen=2
• Using 'create' instead of 'deploy'
• Incorrect command order or syntax

3. Given this deployment command:
gcloud functions deploy helloWorld --runtime python312 --trigger-http --gen=1
What is the expected behavior compared to using --gen=2?

medium

A. Function runs with limited CPU and memory options and no concurrency

B. Function supports concurrency and custom CPU allocation

C. Function cannot be triggered by HTTP

D. Function runs only on App Engine environment

Solution

1. Step 1: Analyze 1st gen deployment features

   1st gen Cloud Functions have fixed CPU and memory limits and do not support concurrency.

2. Step 2: Compare with 2nd gen features

   2nd gen supports concurrency and custom CPU allocation, unlike 1st gen.

3. Final Answer:

   Function runs with limited CPU and memory options and no concurrency -> Option A

4. Quick Check:

   1st gen = limited resources, no concurrency [OK]

Hint: 1st gen lacks concurrency and CPU control [OK]

Common Mistakes:

• Assuming 1st gen supports concurrency
• Confusing trigger types with generation features
• Thinking 1st gen runs on App Engine

4. You deployed a Cloud Function with --gen=2 but it fails to start due to missing environment variables. What is the likely cause?

medium

A. 1st gen functions do not support environment variables

B. The function runtime does not support environment variables

C. Environment variables were not set using the correct 2nd gen syntax

D. Cloud Functions do not support environment variables in any generation

Solution

1. Step 1: Understand environment variable support

   Both generations support environment variables, but 2nd gen requires specific syntax to set them.

2. Step 2: Identify common deployment mistake

   Using 1st gen syntax or missing flags causes environment variables to be unset in 2nd gen.

3. Final Answer:

   Environment variables were not set using the correct 2nd gen syntax -> Option C

4. Quick Check:

   2nd gen needs correct env var syntax [OK]

Hint: Use correct env var flags for 2nd gen deployment [OK]

Common Mistakes:

• Assuming env vars are unsupported in 1st gen
• Ignoring syntax differences between generations
• Believing runtime limits env var usage

5. You want to deploy a Cloud Function that handles high traffic with concurrency and custom CPU allocation. Which generation should you choose and why?

hard

A. 2nd generation, but it does not support CPU customization

B. 1st generation, because it is simpler and scales automatically

C. 1st generation, because it supports concurrency by default

D. 2nd generation, because it supports concurrency and CPU customization

Solution

1. Step 1: Identify requirements

   The function needs to handle high traffic with concurrency and custom CPU allocation.

2. Step 2: Match features to generation

   2nd gen supports concurrency and lets you customize CPU; 1st gen does not support concurrency or CPU customization.

3. Final Answer:

   2nd generation, because it supports concurrency and CPU customization -> Option D

4. Quick Check:

   Concurrency + CPU control = 2nd gen [OK]

Hint: Choose 2nd gen for concurrency and CPU control [OK]

Common Mistakes:

• Choosing 1st gen for concurrency
• Ignoring CPU customization needs
• Confusing simplicity with feature support