How to trigger a rollout restart on deployment resource from controller-runtime - kubernetes

Question

I have been using kubebuilder for writing custom controller, and aware of Get(), Update(), Delete() methods that it provides. But Now I am looking for a method which mimic the behaviour of kubectl rollout restart deployment. If there is no such direct method then I am looking for correct way to mimic the same.
type CustomReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
}
func (r *CustomReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
configMap := &v1.ConfigMap{}
err = r.Get(ctx, req.namespacedName, configMap)
if err != nil {
logger.Error(err, "Failed to GET configMap")
return ctrl.Result{}, err
}
Say in above code I read a deployment name from the configmap and rollout restart the same as follows:
val := configMap.Data["config.yml"]
config := Config{}
if err := yaml.Unmarshal([]byte(val), &config); err != nil {
logger.Error(err, "failed to unmarshal config data")
return ctrl.Result{}, err
}
// Need equivalent of following
// r.RolloutRestart(config.DeploymentName)

Answer 1

In all cases where you wish to replicate kubectl behavior, the answer is always to increase its verbosity and it'll show you exactly -- sometimes down to the wire payloads -- what it is doing.
For rollout restart, one will find that it just bumps an annotation on the Deployment/StatefulSet/whatever and that causes the outer object to be "different," and triggering a reconciliation run
You can squat on their annotation, or you can make up your own, or you can use a label change -- practically any "meaningless" change will do