Azure Resource Manager (ARM) concept - Step-by-Step Execution

Process Flow - Azure Resource Manager (ARM) concept

User defines ARM template

↓

Submit template to Azure Resource Manager

↓

ARM validates template syntax and permissions

↓

ARM creates or updates resources as defined

↓

Resources deployed and managed as a group

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User can track deployment status and outputs

This flow shows how a user submits an ARM template to Azure Resource Manager, which validates and deploys resources as a group, allowing easy management and tracking.

Execution Sample

Azure

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    { "type": "Microsoft.Storage/storageAccounts", "name": "mystorageacct", "apiVersion": "2022-09-01", "location": "eastus", "sku": { "name": "Standard_LRS" }, "kind": "StorageV2" }
  ]
}

This ARM template defines a storage account resource to be deployed in Azure.

Process Table

Step	Action	Evaluation	Result
1	User submits ARM template	Template JSON received	Template accepted for processing
2	ARM validates template syntax	Checks JSON schema and required fields	Validation successful
3	ARM checks user permissions	Verifies user can create storage accounts	Permissions confirmed
4	ARM starts resource deployment	Creates storage account resource	Resource creation initiated
5	ARM monitors deployment status	Checks provisioning state	Resource deployed successfully
6	ARM returns deployment outputs	Outputs deployment details	User notified of success

💡 Deployment completes successfully after all resources are created and validated.

Status Tracker

Variable	Start	After Step 2	After Step 3	After Step 5	Final
Template	Not submitted	Validated	Validated	Validated	Validated
Permissions	Unknown	Unknown	Confirmed	Confirmed	Confirmed
Deployment Status	Not started	Not started	Not started	Succeeded	Succeeded

Key Moments - 3 Insights

Why does ARM validate the template before deploying resources?

ARM validates the template syntax and required fields first (see Step 2 in execution_table) to prevent deployment errors and ensure the template is correct.

What happens if the user lacks permissions to create resources?

ARM checks permissions after validation (Step 3). If permissions are missing, deployment stops to avoid unauthorized resource creation.

How does ARM manage multiple resources in one deployment?

ARM treats all resources in the template as a group and deploys them together, allowing tracking and rollback if needed (Step 4 and 5).

Visual Quiz - 3 Questions

Look at the execution_table, at which step does ARM confirm user permissions?

A Step 2

B Step 3

C Step 4

D Step 5

💡 Hint

Check the 'Action' column for permission verification in execution_table row 3.

According to variable_tracker, what is the deployment status after Step 3?

A Succeeded

B Failed

C Not started

D In progress

💡 Hint

Look at the 'Deployment Status' row under 'After Step 3' in variable_tracker.

If the template had syntax errors, which step in execution_table would fail?

A Step 2

B Step 4

C Step 1

D Step 6

💡 Hint

Refer to the 'ARM validates template syntax' action in execution_table row 2.

Concept Snapshot

Azure Resource Manager (ARM) lets you deploy and manage Azure resources as a group.
You write a JSON template describing resources.
Submit it to ARM, which validates and deploys all resources together.
ARM tracks deployment status and outputs results.
This makes managing cloud resources easier and consistent.

Full Transcript

Azure Resource Manager (ARM) is a service that helps you deploy and manage resources in Azure. You create a JSON template that describes what resources you want, like storage accounts or virtual machines. When you submit this template to ARM, it first checks if the template is correct and if you have permission to create those resources. Then, ARM creates all the resources as a group and keeps track of the deployment progress. Once done, it tells you if everything worked or if there were problems. This process helps you manage your cloud resources easily and reliably.

Practice

1. What is the main purpose of Azure Resource Manager (ARM)?

easy

A. To write code for mobile applications

B. To manage and organize cloud resources as a group

C. To monitor network traffic only

D. To create virtual machines manually

Solution

1. Step 1: Understand ARM's role

   ARM is designed to help manage cloud resources together, not individually.

2. Step 2: Compare options

   Options B, C, and D describe unrelated tasks, while A correctly describes ARM's purpose.

3. Final Answer:

   To manage and organize cloud resources as a group -> Option B

4. Quick Check:

   ARM manages resources as a group = A [OK]

Hint: ARM groups resources for easy management [OK]

Common Mistakes:

• Thinking ARM is only for virtual machines
• Confusing ARM with monitoring tools
• Assuming ARM writes application code

2. Which of the following is the correct way to deploy resources using ARM templates?

easy

A. Using FTP to upload ARM templates

B. Writing scripts in Python only

C. Using Azure Portal or Azure CLI with the ARM template

D. Manually creating resources without templates

Solution

1. Step 1: Identify deployment methods

   ARM templates are deployed via Azure Portal or Azure CLI commands.

2. Step 2: Eliminate incorrect options

   Python scripts and FTP are not standard deployment methods for ARM templates; manual creation ignores automation benefits.

3. Final Answer:

   Using Azure Portal or Azure CLI with the ARM template -> Option C

4. Quick Check:

   Deploy ARM templates via Portal or CLI = D [OK]

Hint: Deploy ARM templates via Portal or CLI commands [OK]

Common Mistakes:

• Thinking ARM templates deploy only with scripts
• Assuming manual creation is deployment
• Confusing FTP with deployment method

3. Given this ARM template snippet:

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "type": "Microsoft.Storage/storageAccounts",
      "apiVersion": "2021-04-01",
      "name": "mystorageaccount",
      "location": "eastus",
      "sku": { "name": "Standard_LRS" },
      "kind": "StorageV2"
    }
  ]
}

What resource will this template create when deployed?

medium

A. A storage account named mystorageaccount in East US region

B. A virtual machine named mystorageaccount

C. A database named mystorageaccount

D. A network interface named mystorageaccount

Solution

1. Step 1: Analyze resource type in template

   The resource type is "Microsoft.Storage/storageAccounts", which means a storage account.

2. Step 2: Check resource properties

   The name is "mystorageaccount" and location is "eastus", confirming the storage account details.

3. Final Answer:

   A storage account named mystorageaccount in East US region -> Option A

4. Quick Check:

   Resource type storageAccounts = storage account = A [OK]

Hint: Resource type defines what is created in ARM template [OK]

Common Mistakes:

• Confusing storage account with virtual machine
• Ignoring resource type and focusing on name
• Assuming location affects resource type

4. You try to deploy an ARM template but get an error saying the resource name is invalid. What is the most likely cause?

medium

A. The template schema URL is missing

B. The location is not specified

C. The API version is too old

D. The resource name contains unsupported characters

Solution

1. Step 1: Understand error message

   An invalid resource name error usually means the name has characters not allowed by Azure naming rules.

2. Step 2: Review other options

   Missing schema URL or old API version cause different errors; location missing usually triggers a different message.

3. Final Answer:

   The resource name contains unsupported characters -> Option D

4. Quick Check:

   Invalid name error = unsupported characters in name = B [OK]

Hint: Check resource name for invalid characters first [OK]

Common Mistakes:

• Assuming schema URL causes name errors
• Ignoring naming rules for resources
• Thinking location omission causes name errors

5. You want to deploy multiple resources together and ensure they are created in the right order using ARM templates. Which feature should you use?

hard

A. Define dependencies between resources using the "dependsOn" property

B. Deploy each resource separately in different templates

C. Use manual deployment steps outside ARM

D. Create resources without specifying order

Solution

1. Step 1: Identify how ARM manages resource order

   ARM uses the "dependsOn" property to specify which resources must be created first.

2. Step 2: Evaluate other options

   Deploying separately or manually loses automation benefits; no order risks deployment failures.

3. Final Answer:

   Define dependencies between resources using the "dependsOn" property -> Option A

4. Quick Check:

   Use dependsOn to control deployment order = C [OK]

Hint: Use dependsOn to set resource creation order [OK]

Common Mistakes:

• Deploying resources separately instead of together
• Ignoring dependsOn and causing deployment errors
• Relying on manual steps outside ARM