Public IP addresses in Azure - Mini Project: Build & Apply

Create and Configure a Public IP Address in Azure

📖 Scenario: You are setting up a simple web server in Azure. To allow users to access your server from the internet, you need to create a Public IP address resource. This project will guide you through creating and configuring a Public IP address using Azure Resource Manager (ARM) template syntax.

🎯 Goal: Build an ARM template that creates a Public IP address resource with a static allocation method and a DNS name label.

📋 What You'll Learn

Create a resource of type Microsoft.Network/publicIPAddresses named myPublicIP.

Set the location to eastus.

Configure the publicIPAllocationMethod to Static.

Add a DNS name label myuniquednslabel under dnsSettings.

💡 Why This Matters

🌍 Real World

Public IP addresses allow internet users to reach your cloud services. Setting them up correctly is essential for web servers, APIs, and other public-facing applications.

💼 Career

Cloud engineers and infrastructure specialists often create and manage Public IP addresses to ensure services are reachable and properly configured for security and performance.

1

Create the basic Public IP address resource structure

Create a resource dictionary called myPublicIP with type set to Microsoft.Network/publicIPAddresses and location set to eastus.

Azure

# Your code here to create the resource dictionary with type and location

Hint

Start by defining a dictionary with keys type and location inside myPublicIP.

2

Add the public IP allocation method configuration

Add a properties dictionary inside myPublicIP and set publicIPAllocationMethod to Static.

Azure

{
  "myPublicIP": {
    "type": "Microsoft.Network/publicIPAddresses",
    "location": "eastus",
    // Add properties with publicIPAllocationMethod here
  }
}

Hint

Inside myPublicIP, add a properties key with a dictionary value containing publicIPAllocationMethod.

3

Add DNS settings with a DNS name label

Inside the properties dictionary of myPublicIP, add a dnsSettings dictionary with domainNameLabel set to myuniquednslabel.

Azure

{
  "myPublicIP": {
    "type": "Microsoft.Network/publicIPAddresses",
    "location": "eastus",
    "properties": {
      "publicIPAllocationMethod": "Static",
      // Add dnsSettings with domainNameLabel here
    }
  }
}

Hint

Within properties, add dnsSettings as a dictionary with the key domainNameLabel.

4

Complete the ARM template with the resources array

Wrap the myPublicIP resource inside a resources array to form a valid ARM template structure.

Azure

{
  // Wrap the resource inside a resources array
  
  // Your code here
}

Hint

ARM templates require a resources array. Place your resource object inside this array and add the name key.

Practice

1.

What is the main purpose of a Public IP address in Azure?

easy

A. To allow cloud resources to connect to the internet

B. To secure internal communication within a virtual network

C. To store data securely in the cloud

D. To monitor resource usage and billing

Solution

1. Step 1: Understand Public IP role

   Public IP addresses enable resources to communicate over the internet.

2. Step 2: Compare options

   Only To allow cloud resources to connect to the internet describes internet connectivity, others describe unrelated functions.

3. Final Answer:

   To allow cloud resources to connect to the internet -> Option A

4. Quick Check:

   Public IP = Internet access [OK]

Hint: Public IP means internet access for resources [OK]

Common Mistakes:

• Confusing Public IP with internal network IP
• Thinking Public IP stores data
• Mixing Public IP with monitoring tools

2.

Which option correctly defines a Static Public IP address in Azure?

publicIpAllocationMethod: ?

easy

A. "Fixed"

B. "Dynamic"

C. "Manual"

D. "Static"

Solution

1. Step 1: Recall allocation methods

   Azure uses "Static" and "Dynamic" as valid allocation methods for Public IPs.

2. Step 2: Identify correct syntax

   "Static" is the exact string to assign for fixed IP allocation.

3. Final Answer:

   "Static" -> Option D

4. Quick Check:

   Static = fixed IP allocation [OK]

Hint: Static means fixed IP, use exact string "Static" [OK]

Common Mistakes:

• Using "Manual" or "Fixed" which are invalid values
• Confusing "Dynamic" with static allocation
• Omitting quotes around the string

3.

Given this Azure CLI command, what will be the SKU of the created Public IP?

az network public-ip create --name MyIP --resource-group MyGroup --sku Standard --allocation-method Static

medium

A. Standard

B. Basic

C. Premium

D. Dynamic

Solution

1. Step 1: Identify SKU parameter

   The command includes "--sku Standard", which sets the SKU to Standard.

2. Step 2: Understand SKU options

   Standard and Basic are common SKUs; Premium is not valid here, Dynamic is allocation method.

3. Final Answer:

   Standard -> Option A

4. Quick Check:

   --sku Standard means Standard SKU [OK]

Hint: Look for --sku value to find SKU type [OK]

Common Mistakes:

• Confusing allocation method with SKU
• Assuming default SKU is Basic without checking
• Selecting Dynamic which is not a SKU

4.

Identify the error in this Azure Resource Manager (ARM) template snippet for a Public IP:

{
  "type": "Microsoft.Network/publicIPAddresses",
  "apiVersion": "2021-02-01",
  "name": "myPublicIP",
  "properties": {
    "publicIPAllocationMethod": "Static",
    "sku": "Standard"
  }
}

medium

A. "name" must be inside "properties"

B. "sku" should be outside "properties" block

C. "publicIPAllocationMethod" value should be "Dynamic"

D. "apiVersion" is invalid

Solution

1. Step 1: Check ARM template structure

   In ARM templates, "sku" is a top-level property, not inside "properties".

2. Step 2: Validate other fields

   "publicIPAllocationMethod" can be "Static" inside properties; "name" is correctly placed; "apiVersion" is valid.

3. Final Answer:

   "sku" should be outside "properties" block -> Option B

4. Quick Check:

   SKU location in ARM = outside properties [OK]

Hint: "sku" is a sibling of "properties", not inside it [OK]

Common Mistakes:

• Placing "sku" inside properties
• Changing allocation method unnecessarily
• Misplacing "name" property

5.

You want a Public IP that never changes and offers better reliability for a production web app. Which combination should you choose?

hard

A. Dynamic allocation with Basic SKU

B. Static allocation with Basic SKU

C. Static allocation with Standard SKU

D. Dynamic allocation with Standard SKU

Solution

1. Step 1: Understand allocation methods

   Static allocation ensures the IP address does not change over time.

2. Step 2: Choose SKU for reliability

   Standard SKU provides better features and reliability than Basic SKU.

3. Step 3: Combine for production needs

   Static allocation with Standard SKU fits production web app requirements.

4. Final Answer:

   Static allocation with Standard SKU -> Option C

5. Quick Check:

   Static + Standard = fixed, reliable IP [OK]

Hint: Static + Standard SKU = fixed and reliable IP [OK]

Common Mistakes:

• Choosing Dynamic allocation for fixed IP needs
• Using Basic SKU for production reliability
• Mixing SKU and allocation method incorrectly