How to detect if Azure Powershell session has expired?

Question

I'm writing an Azure PowerShell script and to login to Azure I call Add-AzureAccount which will popup a browser login window.

I'm wondering what's the best way to check if the authentication credentials have expired or not and thus if I should call Add-AzureAccount again?

What I now do is that I just call Get-AzureVM and see if $? equals to $False. Sounds a bit hackish to me, but seems to work. And does it still work if the subscription doesn't have any virtual machines deployed?

Answer 1

Azure RM but this will check if there is an active account otherwise throw up a prompt.

if ([string]::IsNullOrEmpty($(Get-AzureRmContext).Account)) {Login-AzureRmAccount} 

Cheers

Answer 2

You need to run Get-AzureRmContext and check if the Account property is populated. In the latest version of AzureRM, Get-AzureRmContext doesn't raise error (the error is raised by cmdlets that require active session). However, apparently in some other versions it does.

This works for me:

function Login {     $needLogin = $true     Try      {         $content = Get-AzureRmContext         if ($content)          {             $needLogin = ([string]::IsNullOrEmpty($content.Account))         }      }      Catch      {         if ($_ -like "*Login-AzureRmAccount to login*")          {             $needLogin = $true         }          else          {             throw         }     }      if ($needLogin)     {         Login-AzureRmAccount     } } 

If you are using the new Azure PowerShell API, it's much simpler

function Login($SubscriptionId) {     $context = Get-AzContext      if (!$context -or ($context.Subscription.Id -ne $SubscriptionId))      {         Connect-AzAccount -Subscription $SubscriptionId     }      else      {         Write-Host "SubscriptionId '$SubscriptionId' already connected"     } }