Azure - Installing Connector on Windows Instances

How does it work?

Once you have prepared the script you should copy it as a blob to the storage account. Once it is done you should provide proper input parameters to script, limit the scope of virtual machines to which it should apply (line 12 of a script) and this is the way to add custom script extension to multiple machines on Azure.

IMPORTANT:

You should keep in mind that the script will remove the custom script extension if it already exists on the machine. It will not destroy changes applied by this script, but only the extension itself. The reason of that is the Azure VMs do not support more than one same type of extension installed.

Requirements:

• Az module installed
• Proper access to the subscription where you have a storage account and virtual machines – best Contributor

Script to customize:

param(
$TenantId = ???
$defaultSubscriptionId = ???
$customScriptExtensionName = JetPatch_Connector
$scriptName = Azure-DeployJetPatchConnectorOnWindows.ps1
$storageAccountName = ???
$storageAccountContainer = ???
$storageAccountResourceGroup = ???
$storageSubscriptionId = ???
)

$VMs = Get-AzVM ## Here you should apply filter if you want to limit installation to specific VMs (See article for parameters https://shorturl.at/nCPUV )

Select-AzSubscription -SubscriptionId $storageSubscriptionId

$fileUri = @("https://$storageAccountName.blob.core.windows.net/$storageAccountContainer/$scriptName")
$settings = @{"fileUris" = $fileUri};
$storageKey = (Get-AzStorageAccountKey -Name $storageAccountName -ResourceGroupName $storageAccountResourceGroup)[0].Value
$protectedSettings = @{"storageAccountName" = $storageAccounttName; "storageAccountKey" = $storageKey; "commandToExecute" = "powershell -ExecutionPolicy Unrestricted -File $scriptName"};

Select-AzSubscription -SubscriptionId $defaultSubscriptionId

foreach($vm in $VMs){
Write-Output "Starting VM $($vm.Name)"
Start-AzVm -ResourceGroupName "$($vm.ResourceGroupName)" -Name "$($vm.Name)"
Write-OUtput "Working on vm $($vm.Name)"
$extensions = (Get-AzVm -ResourceGroupName "$($vm.ResourceGroupName)" -Name "$($vm.Name)").Extensions
foreach($ext in $extensions)
{
if($ext.VirtualMachineExtensionType -eq "CustomScriptExtension"){
Write-Output "Removing CustomScriptExtension with name $($ext.Name) from vm $($vm.Name)"
Remove-AzVMExtension -ResourceGroupName "$($vm.ResourceGroupName)" -VMName "$($vm.Name)" -Name $ext.Name -Force
Write-Output "Removed CustomScriptExtension with name $($ext.Name) from vm $($vm.Name)"
}
}
Write-Output "$customScriptExtenstionName installation on VM $($vm.Name)"

Set-AzVMExtension -ResourceGroupName "$($vm.ResourceGroupName)" `
-Location "$($vm.Location)" `
-VMName "$($vm.Name)" `
-Name "$customScriptExtenstionName" `
-Publisher "Microsoft.Compute" `
-ExtensionType "CustomScriptExtension" `
-TypeHandlerVersion "1.10" ` `
-Settings $settings `
-ProtectedSettings $protectedSettings

Write-Output "---------------------------"
}