Azure: Allow to manage machine with identity

kubernetes/machine_classes/azure-machine-class.yaml

@@ -37,6 +37,7 @@ spec:
           publicKeys:
             path: "/path/to/public-key/in/machine" # Path to public key
             keyData: "public-key-data" # Public key data
+    identityID: "/subscriptions/subscription-id/resourceGroups/resource-group-name/providers/Microsoft.ManagedIdentity/userAssignedIdentities/identity-name" # ID of an user assigned managed identity to attach the machine to
     zone: 1 # Zone which the node will be deployed into. Either a zone or an AvailabilitySet can be specified.
     availabilitySet: # AvailabilitySet which the node will be assigned to. Either a zone or an AvailabilitySet can be specified.
       id: "/subscriptions/subscription-id/resourceGroups/resource-group-name/providers/Microsoft.Compute/availabilitySets/availablity-set-name" # ID of availability set to attach the machine to

pkg/apis/machine/types.go

@@ -875,6 +875,7 @@ type AzureVirtualMachineProperties struct {
 	OsProfile       AzureOSProfile
 	NetworkProfile  AzureNetworkProfile
 	AvailabilitySet *AzureSubResource
+	IdentityID      *string
 	Zone            *int
 }
 

pkg/apis/machine/v1alpha1/types.go

@@ -956,6 +956,7 @@ type AzureVirtualMachineProperties struct {
 	OsProfile       AzureOSProfile       `json:"osProfile,omitempty"`
 	NetworkProfile  AzureNetworkProfile  `json:"networkProfile,omitempty"`
 	AvailabilitySet *AzureSubResource    `json:"availabilitySet,omitempty"`
+	IdentityID      *string              `json:"identityID,omitempty"`
 	Zone            *int                 `json:"zone,omitempty"`
 }
 

pkg/driver/driver_azure.go

@@ -163,6 +163,15 @@ func (d *AzureDriver) getVMParameters(vmName string, networkInterfaceReferenceID
 		}
 	}
 
+	if d.AzureMachineClass.Spec.Properties.IdentityID != nil && *d.AzureMachineClass.Spec.Properties.IdentityID != "" {
+		VMParameters.Identity = &compute.VirtualMachineIdentity{
+			Type: compute.ResourceIdentityTypeUserAssigned,
+			UserAssignedIdentities: map[string]*compute.VirtualMachineIdentityUserAssignedIdentitiesValue{
+				*d.AzureMachineClass.Spec.Properties.IdentityID: &compute.VirtualMachineIdentityUserAssignedIdentitiesValue{},
+			},
+		}
+	}
+
 	return VMParameters
 }