Improve logging and reasons

Several changes:
- deadline exceeded: Feedback was that it was too general (looked like http error)
- disruption type message is clearer (display allowed types as well)
- log all rejections: before we logged only the "budget" rejections, now all rejections are logged.

cmd/main.go

@@ -35,7 +35,6 @@ import (
 
 	nodedisruptionv1alpha1 "github.com/criteo/node-disruption-controller/api/v1alpha1"
 	"github.com/criteo/node-disruption-controller/internal/controller"
-	"github.com/criteo/node-disruption-controller/pkg/utils"
 	//+kubebuilder:scaffold:imports
 )
 
@@ -101,7 +100,7 @@ func main() {
 		os.Exit(1)
 	}
 
-	nodeDisruptionTypes := utils.FilterEmptyString(strings.Split(nodeDisruptionTypesRaw, ","))
+	nodeDisruptionTypes := strings.FieldsFunc(nodeDisruptionTypesRaw, func(c rune) bool { return c == ',' })
 
 	if err = (&controller.NodeDisruptionReconciler{
 		Client: mgr.GetClient(),

internal/controller/nodedisruption_controller.go

@@ -222,6 +222,7 @@ func (ndr *SingleNodeDisruptionReconciler) getRetryDate() metav1.Time {
 // tryTransitionToGranted attempt to transition to the granted state but can result in either pending or rejected
 func (ndr *SingleNodeDisruptionReconciler) tryTransitionToGranted(ctx context.Context) (err error) {
 	nextRetryDate := ndr.getRetryDate()
+	logger := log.FromContext(ctx)
 
 	var state nodedisruptionv1alpha1.NodeDisruptionState
 
@@ -245,6 +246,11 @@ func (ndr *SingleNodeDisruptionReconciler) tryTransitionToGranted(ctx context.Co
 		if !nextRetryDate.IsZero() {
 			state = nodedisruptionv1alpha1.Pending
 		} else {
+			for _, status := range statuses {
+				if !status.Ok {
+					logger.Info("Disruption rejected", "status", status)
+				}
+			}
 			state = nodedisruptionv1alpha1.Rejected
 		}
 	}
@@ -314,7 +320,7 @@ func (ndr *SingleNodeDisruptionReconciler) ValidateWithInternalConstraints(ctx c
 	if ndr.NodeDisruption.Spec.Retry.IsAfterDeadline() {
 		status := nodedisruptionv1alpha1.DisruptedBudgetStatus{
 			Reference: ndr.getNodeDisruptionReference(),
-			Reason:    "Deadline exceeded",
+			Reason:    fmt.Sprintf("Failed to grant maintenance before deadline (deadline: %s)", ndr.NodeDisruption.Spec.Retry.Deadline),
 			Ok:        false,
 		}
 		// Conserve the statuses of the previous iteration to conserve the reason of rejection
@@ -338,7 +344,7 @@ func (ndr *SingleNodeDisruptionReconciler) ValidateWithInternalConstraints(ctx c
 	if len(ndr.Config.NodeDisruptionTypes) != 0 && !slices.Contains(ndr.Config.NodeDisruptionTypes, ndr.NodeDisruption.Spec.Type) {
 		status := nodedisruptionv1alpha1.DisruptedBudgetStatus{
 			Reference: ndr.getNodeDisruptionReference(),
-			Reason:    "Type provided of node disruption is not managed",
+			Reason:    fmt.Sprintf("Type of node disruption provided is not allowed (supported: %s) (see --node-disruption-types on the controller)", ndr.Config.NodeDisruptionTypes),
 			Ok:        false,
 		}
 		return true, []nodedisruptionv1alpha1.DisruptedBudgetStatus{status}, nil
@@ -350,7 +356,6 @@ func (ndr *SingleNodeDisruptionReconciler) ValidateWithInternalConstraints(ctx c
 // ValidateBudgetConstraints check that the Node Disruption is valid against the budgets defined in the cluster
 func (ndr *SingleNodeDisruptionReconciler) ValidateWithBudgetConstraints(ctx context.Context, budgets []Budget) (anyFailed bool, statuses []nodedisruptionv1alpha1.DisruptedBudgetStatus) {
 	disruptedNodes := resolver.NewNodeSetFromStringList(ndr.NodeDisruption.Status.DisruptedNodes)
-	logger := log.FromContext(ctx)
 	anyFailed = false
 
 	impactedBudgets := []Budget{}
@@ -368,7 +373,6 @@ func (ndr *SingleNodeDisruptionReconciler) ValidateWithBudgetConstraints(ctx con
 				Ok:        false,
 			}
 			statuses = append(statuses, status)
-			logger.Info("Disruption rejected because: ", "status", status)
 			DisruptionBudgetRejectedTotal.WithLabelValues(ref.Namespace, ref.Name, ref.Kind).Inc()
 			break
 		}
@@ -390,7 +394,6 @@ func (ndr *SingleNodeDisruptionReconciler) ValidateWithBudgetConstraints(ctx con
 				Ok:        false,
 			}
 			statuses = append(statuses, status)
-			logger.Info("Disruption rejected because: ", "status", status)
 			DisruptionBudgetRejectedTotal.WithLabelValues(ref.Namespace, ref.Name, ref.Kind).Inc()
 			break
 		}

internal/controller/nodedisruption_controller_test.go

@@ -562,7 +562,7 @@ var _ = Describe("NodeDisruption controller", func() {
 							Name:      "test-nodedisruption",
 							Kind:      "NodeDisruption",
 						},
-						Reason: "Deadline exceeded",
+						Reason: fmt.Sprintf("Failed to grant maintenance before deadline (deadline: %s)", disruption.Spec.Retry.Deadline),
 						Ok:     false,
 					}}
 					Expect(disruption.Status.DisruptedDisruptionBudgets).Should(Equal(expectedStatus))