Export IoT Devices from IoT Hubs after enumerating Resource Groups from for IoT Hubs in an Azure Subscription

Export IoT Devices from IoT Hubs.ps1

Import-Module Azure

Login-AzureRmAccount
$sub = Get-AzureRMSubscription | Get-AzureRMSubscription -SubscriptionName "Visual Studio Professional with MSDN"
Select-AzureRmSubscription -SubscriptionId $sub.Id[0] 

#Get all Resource Groups in Subscription
$ResourceGroups = Get-AzureRmResourceGroup
$IoTHubs = @()

foreach ($RG in $ResourceGroups){
    try {
        # Find IoT Hubs
        $IoTHub = Get-AzureRmIotHub -ResourceGroupName $RG.ResourceGroupName
        $IoTHub
        $IoTHubs += $IoTHub        
    }
    catch {
        write-host "Something went wrong enumerating IoT Hub(s) in Resource Group $($RG.ResourceGroupName)"
    }
}
$IoTHubs


#Enmerate the IoT Hubs to export the IoT Devices
$IoTKeyName = "iothubowner"
$IoTDevices = @()

ForEach($hub in $IoTHubs) {
    # Temp Output File to download exported IoT Devices too
    $outputFile = "C:\temp\$($hub.name)-devices.txt"
    
    # version 3.1.3 of AzureRM.IotHub doesn't return ResourceGroupName property. Derive from ID instead
    [array]$Id = $hub.Id.split("/")
    $rg = $Id[4]
    # HubKey
    $hubKey = Get-AzureRmIotHubKey -ResourceGroupName $rg -Name $hub.Name -KeyName $IoTKeyName
    # IoT ConnectionString
    $IoTConnectionString  = "HostName=$($hub.Name).azure-devices.net;SharedAccessKeyName=$($IoTKeyName);SharedAccessKey=$($hubKey.PrimaryKey)"
    $registry = Get-AzureRmIotHubRegistryStatistic -ResourceGroupName $rg -Name $hub.Name 

    # Get/Create a Storage Account to Export Devices to
    try {
        # Get Storage Account Details if it it exits
        $storageAccount = Get-AzureRmStorageAccount -ResourceGroupName $rg -Name "$($hub.Name)export" 
        $storageAccountCTX = $storageAccount.Context        
        $storageAccountKey = (Get-AzureRmStorageAccountKey -ResourceGroupName $rg -Name $storageAccount.StorageAccountName).Value[0]        
        $storageContainer = Get-AzureStorageContainer -Name "$($hub.Name.ToLower())export" -Context $storageAccountCTX 
        $containerSASToken = $storageContainer | New-AzureStorageContainerSASToken -Permission rwdl 

    } catch {
        # Doesn't Exist. Create a new one.
        # Create New Storage Account, Container and Generate Container SASToken
        write-host "$($hub.Name)export doesn't exist. Creating new Storage Account."
        $storageAccount = New-AzureRmStorageAccount -ResourceGroupName $rg -AccountName "$($hub.Name.ToLower())export" -Location $hub.Location -SkuName "Standard_GRS" 
        $storageAccountCTX = $storageAccount.Context
        $storageAccountKey = (Get-AzureRmStorageAccountKey -ResourceGroupName $rg -Name $storageAccount.StorageAccountName).Value[0]
        $storageContainer = New-AzureStorageContainer -Name "$($hub.Name.ToLower())export" -Permission Container -Context $storageAccountCTX         
        $containerSASToken = $storageContainer | New-AzureStorageContainerSASToken -Permission rwdl 
    }

    
    # Export IOT Devices    
    New-AzureRmIotHubExportDevices -ResourceGroupName $rg -Name $hub.Name -ExportBlobContainerUri "$($storageContainer.CloudBlobContainer.Uri.AbsoluteUri)$($containerSASToken)" -Verbose 
    # Download the Blob Export File
    $deviceBlobContents = $storageAccountCTX | Get-AzureStorageBlob -Container $($storageContainer.name) -Blob devices.txt | Get-AzureStorageBlobContent -Destination $outputFile
    # Open the file and import
    $deviceContents = get-content -path $outputFile | convertfrom-json
    
    foreach ($device in $deviceContents){
        write-host "Device: $($device.id) Status: $($device.status)"
    }
}