Azure - Change Azure Storage Tiers.ps1

#region Install Modules

# Run as Administrator
#Find-Module AzureServicePrincipalAccount | Install-Module

#endregion

# Retrieve Azure Module properties
""
"Validating installed PowerShell Version and Azure PowerShell Module version..."
$ReqVersions = Get-Module Azure -list | Select-Object Version, PowerShellVersion
# Current PowerShell version must be higher then the one required by the Azure Module
if($PSVersionTable.PSVersion.Major -lt $ReqVersions.PowerShellVersion.Major)
{
  $PSVerReq = $ReqVersions.PowerShellVersion
  $PSVerInst = $PSVersionTable.PSVersion
  "Validation failed..."
  "Installed PowerShell version: $PSVerInst"
  "Powershell version $PSVerReq required.  Please update the version of Powershell on this system"
  "Exiting Script"
  Break
} 
# Current script was tested with Azure module 5.0.1 
if($ReqVersions.Version.Major -lt 5)
{
  $AZModuleInst = $ReqVersions.Version
  "Validation failed..."
  "Installed Azure PS Module: $AZModuleInst.  This script was tested with version 5.0.1"
  "Please download and install/update the Azure Powershell module using the Microsoft Web Platform Installer..."
  "Download link: https://github.com/Azure/azure-powershell/releases/tag/v5.0.1-November2017"
  "Exiting Script"
  Break
}

##########################################################################################
#################################     Logon to Azure    ##################################
##########################################################################################

Login-AzureRmAccount

#region Logon to Azure & choose Azure subscription
$Subscription = (Get-AzureRmSubscription | Out-GridView -Title "Choose a Source & Target Subscription ..." -PassThru)
Select-AzureRmSubscription -Subscription $Subscription
$SubscriptionId = $Subscription.Id
#endregion

#### Question time ####
# Question 1 - Select Desired Storage Tier
$StorageTiers = @('Hot', 'Cool', 'Archive')
$StorageTier = ($StorageTiers | Out-GridView -Title "Select a storage tier ..." -PassThru)

# Question 2 - Storage Account
$StorageAccounts = Get-AzureRmStorageAccount | 
Where-Object {($_.sku.tier -eq 'Standard') -and ($_.Kind -eq 'StorageV2' -or $_.Kind -eq 'BlobStorage')}
$StorageAccount = ($StorageAccounts | select StorageAccountName, PrimaryLocation, ResourceGroupName |
Out-GridView -Title "Select the V2 Standard Storage Account you want to scan for blob candidates ..." -PassThru)
$StorageAccountName = $StorageAccount.StorageAccountName


# Question 3 - Days Retention
write-host -nonewline "Enter the number of days retention you want to set, the tier will be set on any older blobs: " -ForegroundColor Green
[int]$DaysOld = read-host

# Setup the Storage Connection stuff
$StgAcct = Get-AzureRmStorageAccount | Where-Object {($_.StorageAccountName -eq $StorageAccountName) -and ($_.sku.tier -eq 'Standard') `
                                                              -and ($_.Kind -eq 'StorageV2' -or $_.Kind -eq 'BlobStorage')}

if ($StgAcct) {

$StgAcctKey = (Get-AzureRmStorageAccountKey -ResourceGroupName $StgAcct.ResourceGroupName `
                                            -Name $StgAcct.StorageAccountName).Value[0]

$StgAcctContext = New-AzureStorageContext -StorageAccountName $StgAcct.StorageAccountName `
                                          -StorageAccountKey $StgAcctKey
$StorageContainers = Get-AzureStorageContainer -Context $StgAcctContext

# Cycle through all blobs in the storage account
$Blobs = @()
foreach($StorageContainer in $StorageContainers){
$Blobs += Get-AzureStorageBlob -Context $StgAcctContext -Container $StorageContainer.Name
}

# Date Logic
$UTCDate = (Get-Date).ToUniversalTime()
$RetentionDate = $UTCDate.AddDays(-$DaysOld)
$EarmarkedBlobs = $Blobs | Where-Object {$_.lastmodified.DateTime -le $RetentionDate}

# Change the Tier on the blobs
Foreach($Blob in $EarmarkedBlobs){
#Set tier of all blobs to desired tier
$blob.icloudblob.SetStandardBlobTier($StorageTier)
}
cls
Write-Host -ForegroundColor Green "`n`nDone... Complete. Check your Blog Tiers in the portal.`n"

} else {

Write-Error "Your selected Storage account cannot be used, most likely because it's `
not a V2 Storage account, a blob storage account or it's not a Standard Storage account"

}