OpenStackMachine: add OpenStackServerRef to Status

An `OpenStackMachine` object has now its `OpenStackServerRef` in Status
so we can know to with `OpenStackServer` it's attached to.

We will set that ref as soon as we found an existing object, whether the
server is running or not yet or in error state.

Author: EmilienM

api/v1alpha7/zz_generated.conversion.go

@@ -233,6 +233,11 @@ type OpenStackMachineStatus struct {
 	FailureMessage *string `json:"failureMessage,omitempty"`
 
 	Conditions clusterv1.Conditions `json:"conditions,omitempty"`
+
+	// OpenStackServerRef is a reference to the OpenStackServer object that
+	// is associated with this OpenStackMachine.
+	// +optional
+	OpenStackServerRef *corev1.TypedLocalObjectReference `json:"openStackServerRef,omitempty"`
 }
 
 // +genclient

api/v1beta1/openstackmachine_types.go

@@ -365,6 +365,15 @@ func (r *OpenStackMachineReconciler) reconcileNormal(ctx context.Context, scope
 		return ctrl.Result{}, err
 	}
 
+	if machineServer != nil {
+		openStackMachine.Status.OpenStackServerRef = &corev1.TypedLocalObjectReference{
+			APIGroup: &infrav1alpha1.SchemeGroupVersion.Group,
+			Kind:     machineServer.Kind,
+			Name:     machineServer.Name,
+		}
+
+	}
+
 	computeService, err := compute.NewService(scope)
 	if err != nil {
 		return ctrl.Result{}, err