How to retrieve storage account key using powershell function app?

Question

I'm using powershell function app to retrieve storage account key but i'm not able to access resources.Please help me.

$resourceGroup = "DemoResourceGroup"

$AccountName = "Demo"

$Key = (Get-AzStorageAccountKey -ResourceGroupName $resourceGroup -Name $AccountName)

Write-Host "storage account key 1 = " $Key

I'm getting following error:

2020-05-14T14:00:05Z [Error] ERROR: Get-AzStorageAccountKey: 'this.Client.SubscriptionId' cannot be null. At D:\home\site\wwwroot\TimerTrigger1\run.ps1:25 char:8 + $key = Get-AzStorageAccountKey -ResourceGroupName "DocumentParser_FBI... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo: CloseError: (:) [Get-AzStorageAccountKey], ValidationException + FullyQualifiedErrorId: Microsoft.Azure.Commands.Management.Storage.GetAzureStorageAccountKeyCommand

Script stack trace: at, D:\home\site\wwwroot\TimerTrigger1\run.ps1: line 25

Microsoft.Rest.ValidationException: 'this.Client.SubscriptionId' cannot be null. at Microsoft.Azure.Management.Storage.StorageAccountsOperations.ListKeysWithHttpMessagesAsync(String resourceGroupName, String accountName, Nullable 1 expand, Dictionary 2 customHeaders, CancellationToken cancellationToken) at Microsoft.Azure.Management.Storage.StorageAccountsOperationsExtensions.ListKeysAsync(IStorageAccountsOperations operations, String resourceGroupName, String accountName, Nullable 1 expand, CancellationToken cancellationToken) at Microsoft.Azure.Management.Storage.StorageAccountsOperationsExtensions.ListKeys(IStorageAccountsOperations operations, String resourceGroupName, String accountName, Nullable 1 expand) at Microsoft.Azure.Commands.Management.Storage.GetAzureStorageAccountKeyCommand.ExecuteCmdlet()

Answer 1

According to the script you provide, you use Az module. So if you want to choose which Azure subscription you use, you need to use the command Select-AzSubscription . Besides, you also can add -Subscription "<subscription Id>" in Connect-AzAccoun to ensure when you login, you choose the right subscription.

For example

1. Create the service principal

Import-Module Az.Resources # Imports the PSADPasswordCredential object
$credentials = New-Object Microsoft.Azure.Commands.ActiveDirectory.PSADPasswordCredential -Property @{ StartDate=Get-Date; EndDate=Get-Date -Year 2024; Password=<Choose a strong password>}
$sp = New-AzAdServicePrincipal -DisplayName ServicePrincipalName -PasswordCredential $credentials

2. assign the role to the service principal. For example, assign Contributor role to the sp at the subscription level

New-AzRoleAssignment -ApplicationId <service principal application ID> -RoleDefinitionName "Contributor" `
-Scope "/subscriptions/<subscription id>"

3. Script

$appId = "your sp app id"
$password = "your sp password"
$secpasswd = ConvertTo-SecureString $password -AsPlainText -Force
$mycreds = New-Object System.Management.Automation.PSCredential ($appId, $secpasswd)

Connect-AzAccount -ServicePrincipal -Credential $mycreds -Tenant <you sp tenant id>
Get-AzSubscription -SubscriptionName "CSP Azure" | Select-AzSubscription

$resourceGroup = "nora4test"

$AccountName = "qsstorageacc"

$Key = (Get-AzStorageAccountKey -ResourceGroupName $resourceGroup -Name $AccountName)[0].Value

Write-Host "storage account key 1 = " $Key