UPSTREAM: <carry>: openshift: vm: Add AdditionalUnattendContent on Wi…

…ndows machines

This commit adds functionality for automatically running
C:\AzureData\CustomData.bin on first boot.
This file is provided via the user data secret,
and contains init scripts.

The Windows Machine Config Operator relies on the user data script being
executed automatically on the Windows VM to set up SSH access.

On AWS, it is invoked automatically after provisioning.
This commit is intended to align Azure with that behavior.

pkg/cloud/azure/services/virtualmachines/virtualmachines.go

@@ -34,6 +34,34 @@ import (
 	"sigs.k8s.io/cluster-api-provider-azure/pkg/cloud/azure/services/networkinterfaces"
 )
 
+const (
+	// winAutoLogonFormatString is the format string used to create the AutoLogon
+	// AdditionalUnattendContent configuration for Windows machines.
+	winAutoLogonFormatString = `<AutoLogon>
+			<Username>%s</Username>
+			<Password>
+				<Value>%s</Value>
+			</Password>
+			<Enabled>true</Enabled>
+			<LogonCount>1</LogonCount>
+		</AutoLogon>`
+
+	// winFirstLogonCommandsString is the string used to create the FirstLogonCommands
+	// AdditionalUnattendContent configuration for Windows machines.
+	winFirstLogonCommandsString = `<FirstLogonCommands>
+			<SynchronousCommand>
+				<Description>Copy user data secret contents to init script</Description>	
+				<CommandLine>cmd /c "copy C:\AzureData\CustomData.bin C:\init.ps1"</CommandLine>
+				<Order>11</Order>
+			</SynchronousCommand>
+			<SynchronousCommand>
+				<Description>Launch init script</Description>	
+				<CommandLine>powershell.exe -NonInteractive -ExecutionPolicy Bypass -File C:\init.ps1</CommandLine>
+				<Order>12</Order>
+			</SynchronousCommand>
+		</FirstLogonCommands>`
+)
+
 // Spec input specification for Get/CreateOrUpdate/Delete calls
 type Spec struct {
 	Name            string
@@ -126,6 +154,20 @@ func (s *Service) CreateOrUpdate(ctx context.Context, spec azure.Spec) error {
 	if compute.OperatingSystemTypes(vmSpec.OSDisk.OSType) == compute.Windows {
 		osProfile.WindowsConfiguration = &compute.WindowsConfiguration{
 			EnableAutomaticUpdates: to.BoolPtr(false),
+			AdditionalUnattendContent: &[]compute.AdditionalUnattendContent{
+				{
+					PassName:      "OobeSystem",
+					ComponentName: "Microsoft-Windows-Shell-Setup",
+					SettingName:   "AutoLogon",
+					Content:       to.StringPtr(fmt.Sprintf(winAutoLogonFormatString, *osProfile.AdminUsername, *osProfile.AdminPassword)),
+				},
+				{
+					PassName:      "OobeSystem",
+					ComponentName: "Microsoft-Windows-Shell-Setup",
+					SettingName:   "FirstLogonCommands",
+					Content:       to.StringPtr(winFirstLogonCommandsString),
+				},
+			},
 		}
 	} else if sshKeyData != "" {
 		osProfile.LinuxConfiguration = &compute.LinuxConfiguration{