Function App creation in Azure - Mini Project: Build & Apply

Function App creation

📖 Scenario: You are setting up a serverless function in Azure to run code in response to events without managing servers.

🎯 Goal: Create an Azure Function App with the required settings to deploy serverless functions.

📋 What You'll Learn

Create a resource group variable

Define a storage account variable

Create the Function App with the correct configuration

Add the runtime stack setting to the Function App

💡 Why This Matters

🌍 Real World

Azure Function Apps let developers run code without managing servers, useful for event-driven tasks like processing uploads or scheduled jobs.

💼 Career

Knowing how to configure and deploy Function Apps is essential for cloud engineers and developers working with serverless architectures.

1

Create resource group variable

Create a variable called resource_group and set it to the string "myResourceGroup".

Azure

# Create a variable called resource_group and set it to "myResourceGroup"
# Your code here

Hint

Use a simple assignment to create the variable resource_group.

2

Define storage account variable

Create a variable called storage_account and set it to the string "mystorageaccount".

Azure

resource_group = "myResourceGroup"
# Create a variable called storage_account and set it to "mystorageaccount"
# Your code here

Hint

Assign the exact string to the variable storage_account.

3

Create the Function App

Create a variable called function_app and set it to a dictionary with keys "name", "resource_group", and "storage_account". Use values "myFunctionApp", resource_group, and storage_account respectively.

Azure

resource_group = "myResourceGroup"
storage_account = "mystorageaccount"
# Create a dictionary called function_app with keys "name", "resource_group", and "storage_account"
# Your code here

Hint

Use a dictionary with the exact keys and values as specified.

4

Add runtime stack configuration

Add a key "runtime_stack" with value "python" to the function_app dictionary.

Azure

resource_group = "myResourceGroup"
storage_account = "mystorageaccount"
function_app = {
    "name": "myFunctionApp",
    "resource_group": resource_group,
    "storage_account": storage_account
}
# Add the key "runtime_stack" with value "python" to function_app
# Your code here

Hint

Add the new key and value inside the existing dictionary.

Practice

1. What is the main purpose of an Azure Function App?

easy

A. To run small pieces of code in the cloud without managing servers

B. To store large amounts of data in the cloud

C. To create virtual machines for hosting websites

D. To manage user identities and access

Solution

1. Step 1: Understand Azure Function App purpose

   Azure Function Apps are designed to run code triggered by events without needing to manage servers.

2. Step 2: Compare options

   Options A, B, and D describe other Azure services like virtual machines, storage, and identity management, not Function Apps.

3. Final Answer:

   To run small pieces of code in the cloud without managing servers -> Option A

4. Quick Check:

   Function Apps run code serverlessly [OK]

Hint: Function Apps run code without servers [OK]

Common Mistakes:

• Confusing Function Apps with storage services
• Thinking Function Apps create virtual machines
• Mixing up Function Apps with identity services

2. Which Azure CLI command correctly creates a Function App named myfuncapp in resource group mygroup with a storage account mystorage and runtime python?

easy

A. az function create --resource mygroup --name myfuncapp --storage-account mystorage --runtime python

B. az functionapp new --group mygroup --app-name myfuncapp --storage mystorage --runtime python

C. az create functionapp --resource-group mygroup --name myfuncapp --storage mystorage --runtime python

D. az functionapp create --resource-group mygroup --name myfuncapp --storage-account mystorage --runtime python

Solution

1. Step 1: Identify correct Azure CLI syntax

   The correct command to create a Function App is az functionapp create with parameters --resource-group, --name, --storage-account, and --runtime.

2. Step 2: Compare options

   az functionapp create --resource-group mygroup --name myfuncapp --storage-account mystorage --runtime python matches the correct syntax. Options B, C, and D use incorrect commands or parameter names.

3. Final Answer:

   az functionapp create --resource-group mygroup --name myfuncapp --storage-account mystorage --runtime python -> Option D

4. Quick Check:

   Use az functionapp create with correct flags [OK]

Hint: Use 'az functionapp create' with correct flags [OK]

Common Mistakes:

• Using wrong command like 'az functionapp new'
• Mixing parameter names like '--group' instead of '--resource-group'
• Omitting required parameters

3. What will happen if you run this Azure CLI command?

az functionapp create --resource-group mygroup --name myfuncapp --storage-account mystorage --runtime node --runtime-version 14

medium

A. Fails because --runtime-version is not a valid parameter

B. Creates a Function App named myfuncapp with Node.js runtime version 14

C. Creates a Function App but ignores the runtime version

D. Creates a Function App with default runtime version

Solution

1. Step 1: Understand parameters in the command

   The command uses --runtime node and specifies --runtime-version 14, which is valid to set Node.js version 14.

2. Step 2: Check Azure CLI behavior

   Azure CLI supports --runtime-version to specify the runtime version, so the Function App will be created with Node.js 14.

3. Final Answer:

   Creates a Function App named myfuncapp with Node.js runtime version 14 -> Option B

4. Quick Check:

   Runtime and version flags create correct environment [OK]

Hint: Use --runtime and --runtime-version to specify environment [OK]

Common Mistakes:

• Thinking --runtime-version is invalid
• Assuming runtime version is ignored
• Confusing runtime with storage account

4. You tried to create a Function App with this command:

az functionapp create --resource-group mygroup --name myfuncapp --storage mystorage --runtime python

But it failed. What is the most likely cause?

medium

A. The parameter --storage is incorrect; it should be --storage-account

B. The runtime python is not supported

C. Resource group mygroup does not exist

D. Function App name myfuncapp is invalid

Solution

1. Step 1: Check command parameters

   The parameter for storage account must be --storage-account, not --storage.

2. Step 2: Validate other options

   Python runtime is supported, resource group existence is not confirmed but the error is about parameter, and the name looks valid.

3. Final Answer:

   The parameter --storage is incorrect; it should be --storage-account -> Option A

4. Quick Check:

   Use correct parameter names in CLI commands [OK]

Hint: Use --storage-account, not --storage [OK]

Common Mistakes:

• Using wrong parameter names
• Assuming runtime unsupported without checking
• Ignoring error messages about parameters

5. You want to create a Function App that runs Python code triggered every hour. Which two Azure services must you configure together to achieve this?

hard

A. Function App and Azure SQL Database

B. Function App and Azure Blob Storage

C. Function App and Timer Trigger

D. Function App and Azure Virtual Machine

Solution

1. Step 1: Identify the trigger for scheduled execution

   Azure Function Apps use triggers to start code. For hourly runs, a Timer Trigger is used.

2. Step 2: Understand service roles

   Blob Storage, Virtual Machines, and SQL Database are not used to schedule function runs but serve other purposes.

3. Final Answer:

   Function App and Timer Trigger -> Option C

4. Quick Check:

   Timer Trigger schedules Function App runs [OK]

Hint: Use Timer Trigger for scheduled Function Apps [OK]

Common Mistakes:

• Confusing storage or database with scheduling
• Thinking VM is needed for Function Apps
• Ignoring triggers in Function Apps