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Azure Resource Manager (ARM)

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Azure Resource Manager (ARM)

Azure Resource Manager Cheat Sheet

  • Azure Resource Manager is a service that allows you to create, update, and delete resources in your Azure account.

  • Enables you to manage access control, locks, and tags for your resources after they have been deployed.

Features

  • All requests are authenticated and authorized by ARM before being routed to the appropriate Azure service.

  • Manage infrastructure using declarative templates and deploy it in a repeatable manner.

  • Deploy, manage, and monitor all resources as a group.

  • Tag resources to logically organize all the resources in your subscription.

  • You can check the costs for a group of resources sharing the same tag.

  • Define the dependencies between resources, so they’re deployed in the correct order.

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Resource groups

  • A container that holds related resources.

  • You can create a resource group using the Azure Portal, PowerShell, CLI, or an ARM template.

  • Each resource can only exist in a single resource group.

  • You can add or remove resources to any resource group at any time.

  • Allows you to move a resource from one resource group to another.

  • Resources from multiple regions can be in one resource group.

  • You can give users access to a resource group.

  • Resources can interact with other resources in different resource groups.

  • A resource group has a location or region, as it stores metadata about the resources.

  • When you delete a resource group, it also deletes all of its resources.

ARM templates

  • The template is a JSON file with declarative syntax that defines the properties and configuration of your resources. It is divided into the following sections:

    • Parameters – values that allow the same template to be used in multiple environments.

    • Variables – values that can be reused in templates.

    • User-defined functions – customized functions to simplify the template.

    • Resources – define the resources to be deployed.

    • Outputs – values from deployed resources.

  • When a template is deployed, ARM converts it into REST API operations.

  • You can specify an apiVersion so that you can reuse the template without worrying about breaking changes introduced in later versions.

  • To make sure your template adheres to suggested best practices, use an ARM template toolkit (arm-ttk).

  • Before deploying the template, you can preview changes using the what-if operation.

  • To deploy a template, you can use the following:

    • Azure Portal

    • Azure CLI

    • Azure Cloud Shell

    • PowerShell

    • REST API

    • Button in GitHub repository

  • An application can be defined in a single template or divided into a purpose-specific template (modular files). You can also create a parent template that links all the nested templates.

  • You can share the template using template specs and manage access using role-based access control (RBAC).

    • Link template – a different template file that is linked from the primary template.

    • Nested template – an embedded template syntax within the main template.

  • You can also get the template of an existing resource group by exporting it.

  • With Azure Pipelines, you can continuously build and deploy ARM template projects.

Azure Resource Manager Pricing

  • You are only charged for the resources deployed by the ARM template.

 

Azure Resource Manager Cheat Sheet References:

https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/overview

https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/overview

 

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Written by: Gerome Pagatpatan

Gerome is a Software Engineer with 5 cloud certifications from Amazon Web Services, Microsoft Azure, and Oracle. He co-authored high-quality educational materials in the cloud computing space, which have been used by over a quarter-million people worldwide. He is also part of the AWS Community Builders program, which aims to help fellow IT professionals advance their careers in the cloud. He is passionate about education, and now it's his turn to share his knowledge, experiences, and passion for cloud computing.

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