Add support for reconciles machine taints with nodes

pkg/controller/machine/controller.go

@@ -113,6 +113,11 @@ func (r *ReconcileMachine) Reconcile(request reconcile.Request) (reconcile.Resul
 	name := m.Name
 	klog.Infof("Running reconcile Machine for %s\n", name)
 
+	if err := r.reconcileTaintsWithNode(*m); err != nil {
+		klog.Infof("failed to reconcile machine object %v taints with its node due to error %v.", name, err)
+		return reconcile.Result{}, err
+	}
+
 	// If object hasn't been deleted and doesn't have a finalizer, add one
 	// Add a finalizer to newly created objects.
 	if m.ObjectMeta.DeletionTimestamp.IsZero() &&
@@ -209,6 +214,14 @@ func (c *ReconcileMachine) update(ctx context.Context, new_machine *clusterv1.Ma
 	return c.actuator.Update(ctx, cluster, new_machine)
 }
 
+func (r *ReconcileMachine) reconcileTaintsWithNode(machine clusterv1.Machine) error {
+	if node := machine.Status.NodeRef; node != nil {
+		// TODO: sync taints logic and unit test
+		return r.Client.Update(context.Background(), node)
+	}
+	return nil
+}
+
 func (c *ReconcileMachine) delete(ctx context.Context, machine *clusterv1.Machine) error {
 	cluster, err := c.getCluster(ctx, machine)
 	if err != nil {