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Whatif Command For Azure ARM

In this article, we will discuss the "WhatIf" command for Azure ARM.

Purpose

When template deployment is done using PowerShell, the "WhatIf" command is used to preview the changes before it is executed.

For the "WhatIf" command, we will work on the following steps.

So, let us start.

To upgrade the PowerShell, open the current version of PowerShell in the "Admin" Mode. Use the following command.

iex "& { $(irm https://aka.ms/install-powershell.ps1) } -UseMSI"

Once you execute the above command, a wizard will appear to install the latest version of PowerShell.

Open the latest version of PowerShell in the "Admin" mode. Execute the following command.

Install-Module Az.Resources -RequiredVersion 1.12.1-preview -AllowPrerelease

Create an IP address and download the template files. Check this article for more info. These are the 2 files downloaded.

Click to Enlarge

In the "parameters.json" file, set some value to the "value" attribute.

In PowerShell, go to the path where template files are stored. Execute the following command.

New-AzResourceGroupDeployment -ResourceGroupName "RG2" -TemplateParameterFile ./parameters.json -TemplateFile ./template.json -WhatIf

You will get the changes.

Click to Enlarge

Once you are satisfied with the changes, you can execute the above command without the "WhatIf" command.

New-AzResourceGroupDeployment -ResourceGroupName "RG2" -TemplateParameterFile ./parameters.json -TemplateFile ./template.json

The command gets executed successfully and the resource is created.

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