Add validation for percentage-of-nodes-to-score of the scheduler config

pkg/scheduler/apis/config/validation/validation.go

@@ -44,6 +44,10 @@ func ValidateKubeSchedulerConfiguration(cc *config.KubeSchedulerConfiguration) f
 	if cc.BindTimeoutSeconds == nil {
 		allErrs = append(allErrs, field.Required(field.NewPath("bindTimeoutSeconds"), ""))
 	}
+	if cc.PercentageOfNodesToScore < 0 || cc.PercentageOfNodesToScore > 100 {
+		allErrs = append(allErrs, field.Invalid(field.NewPath("percentageOfNodesToScore"),
+			cc.PercentageOfNodesToScore, "not in valid range 0-100"))
+	}
 	return allErrs
 }
 

pkg/scheduler/apis/config/validation/validation_test.go

@@ -58,7 +58,8 @@ func TestValidateKubeSchedulerConfiguration(t *testing.T) {
 				RetryPeriod:   metav1.Duration{Duration: 5 * time.Second},
 			},
 		},
-		BindTimeoutSeconds: &testTimeout,
+		BindTimeoutSeconds:       &testTimeout,
+		PercentageOfNodesToScore: 35,
 	}
 
 	HardPodAffinitySymmetricWeightGt100 := validConfig.DeepCopy()
@@ -92,6 +93,9 @@ func TestValidateKubeSchedulerConfiguration(t *testing.T) {
 	bindTimeoutUnset := validConfig.DeepCopy()
 	bindTimeoutUnset.BindTimeoutSeconds = nil
 
+	percentageOfNodesToScore101 := validConfig.DeepCopy()
+	percentageOfNodesToScore101.PercentageOfNodesToScore = int32(101)
+
 	scenarios := map[string]struct {
 		expectedToFail bool
 		config         *config.KubeSchedulerConfiguration
@@ -136,6 +140,10 @@ func TestValidateKubeSchedulerConfiguration(t *testing.T) {
 			expectedToFail: true,
 			config:         bindTimeoutUnset,
 		},
+		"bad-percentage-of-nodes-to-score": {
+			expectedToFail: true,
+			config:         percentageOfNodesToScore101,
+		},
 	}
 
 	for name, scenario := range scenarios {