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<#
Written with PowerShell v7.0.1 - install available here https://github.com/PowerShell/powershell/releases
Written with version 4.2.0 of the Az PowerShell Module
available from here https://github.com/Azure/azure-powershell/releases/tag/v4.2.0-June2020 or run: Install-Module -Name Az -RequiredVersion 4.2.0 -AllowClobber
Migration instructions Azure.RM to Az - https://azure.microsoft.com/en-au/blog/how-to-migrate-from-azurerm-to-az-in-azure-powershell/
#>
##########################################################################################
############################ Logon to Microsoft Azure #############################
##########################################################################################
$AzContextPath = "$($env:TEMP)\$(Get-Date -Format yyyyMMdd)AzEnv.json"
#region Logon to Azure | @marckean
Connect-AzAccount -Tenant '72f988bf-86f1-41af-91ab-2d7cd011db47'
##################### Subscription Select #####################
$subscriptions = Get-AzSubscription
$cnt = 1
Write-Host "ID Subscription Name"
Write-Host "-----------------------"
foreach ($sub in $subscriptions){
Write-Host "$cnt $($sub.name)"
$cnt++
}
$selection = Read-Host -Prompt "Select a subscription to deploy to"
$subSelect = $subscriptions[$selection - 1] # Revert 1-index to 0-index
Select-AzSubscription $subSelect.SubscriptionId
Save-AzContext -Path $AzContextPath -Force
#endregion
##########################################################################################
################################ List of VM sizes #################################
##########################################################################################
# Get a list of VM sizes, so you know exactly the format of the name:
(Get-AzVMSize -Location 'Australia East').Name | Select-String 'DS14'
##########################################################################################
############################# List of VMs to re-size ##############################
##########################################################################################
#region List of VMs to re-size | @marckean
########### Only do one of two options here ###########
# Option 1: Pull VMs from a .CSV file - two columns, headers (vmname,targetsize) | @marckean
$VMs_to_resize = Import-Csv -Path 'W:\VMs_to_resize.csv'
# Option 2: Pull VMs from a comma separated here string - this is practically a mini CSV file anyway | @marckean
$VMs = @'
vmname,targetsize
Hadoop01,Standard_DS14_v2
Hadoop02,Standard_DS14_v2
'@
$VMs_to_resize = $VMs | ConvertFrom-Csv
#endregion
##########################################################################################
################################ Resize the VMs ###################$##############
##########################################################################################
$VMs_to_resize | ForEach-Object -Parallel {
Import-AzContext -Path $using:AzContextPath
# Set private IP address to static to not loose it
$NicID = ((Get-AzVM -Name $_.vmname).NetworkProfile.NetworkInterfaces[0].Id)
$Nic = Get-AzNetworkInterface -ResourceId $NicID
$PrivateIpAllocationMethod = $Nic.IpConfigurations[0].PrivateIpAllocationMethod # Remember original Private IP Allocation Method
If($PrivateIpAllocationMethod -eq 'Dynamic'){ # only change the IP addess to static it's Dynamic
$Nic.IpConfigurations[0].PrivateIpAllocationMethod = 'Static'
Set-AzNetworkInterface -NetworkInterface $Nic}
Write-Output "$($_.vmname) is currently set as $PrivateIpAllocationMethod"
# Stop deallocate, resize the VM
$vm = Get-AzVM -Name $_.vmname
$VMsize = $_.targetsize
Write-Output "Change $($_.vmname) to $VMsize"
$vm | Stop-AzVM -Force
$vm.HardwareProfile.VmSize = $VMsize
Update-AzVM -VM $vm -ResourceGroupName $vm.ResourceGroupName
$vm | Start-AzVM
# Changing the Private IP address allocation method of a running VM to Dynamic using PowerShell doesn't cause a restart
If($PrivateIpAllocationMethod -eq 'Dynamic'){ # only change the IP addess back to Dynamic it was Dynamic in the first instance
$Nic = Get-AzNetworkInterface -ResourceId ((Get-AzVM -Name $_.vmname).NetworkProfile.NetworkInterfaces[0].Id)
$Nic.IpConfigurations[0].PrivateIpAllocationMethod = 'Dynamic'
Set-AzNetworkInterface -NetworkInterface $Nic}
}
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