feat: initialize reconciler metrics when controller is started

pkg/internal/controller/controller.go

@@ -143,6 +143,8 @@ func (c *Controller) Start(ctx context.Context) error {
 		return errors.New("controller was started more than once. This is likely to be caused by being added to a manager multiple times")
 	}
 
+	c.initMetrics()
+
 	// Set the internal context.
 	c.ctx = ctx
 
@@ -202,7 +204,6 @@ func (c *Controller) Start(ctx context.Context) error {
 
 		// Launch workers to process resources
 		c.Log.Info("Starting workers", "worker count", c.MaxConcurrentReconciles)
-		ctrlmetrics.WorkerCount.WithLabelValues(c.Name).Set(float64(c.MaxConcurrentReconciles))
 		for i := 0; i < c.MaxConcurrentReconciles; i++ {
 			go wait.UntilWithContext(ctx, func(ctx context.Context) {
 				// Run a worker thread that just dequeues items, processes them, and marks them done.
@@ -248,6 +249,16 @@ func (c *Controller) processNextWorkItem(ctx context.Context) bool {
 	return true
 }
 
+func (c *Controller) initMetrics() {
+	ctrlmetrics.ActiveWorkers.WithLabelValues(c.Name).Set(0)
+	ctrlmetrics.ReconcileErrors.WithLabelValues(c.Name).Add(0)
+	ctrlmetrics.ReconcileTotal.WithLabelValues(c.Name, "error").Add(0)
+	ctrlmetrics.ReconcileTotal.WithLabelValues(c.Name, "requeue_after").Add(0)
+	ctrlmetrics.ReconcileTotal.WithLabelValues(c.Name, "requeue").Add(0)
+	ctrlmetrics.ReconcileTotal.WithLabelValues(c.Name, "success").Add(0)
+	ctrlmetrics.WorkerCount.WithLabelValues(c.Name).Set(float64(c.MaxConcurrentReconciles))
+}
+
 func (c *Controller) reconcileHandler(ctx context.Context, obj interface{}) {
 	// Update metrics after processing each item
 	reconcileStartTS := time.Now()