add validation for autoscale

Signed-off-by: Sergei Semenchuk <pdp.eleven11@gmail.com>

Author: binjip978

apis/v1alpha1/opentelemetrycollector_webhook.go

@@ -109,5 +109,20 @@ func (r *OpenTelemetryCollector) validateCRDSpec() error {
 		}
 	}
 
+	// validate autoscale with horizontal pod autoscaler
+	if r.Spec.Autoscale != nil && *r.Spec.Autoscale {
+		if r.Spec.Replicas != nil {
+			return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, replicas should be nil")
+		}
+
+		if r.Spec.MaxReplicas == nil || *r.Spec.MaxReplicas < int32(1) {
+			return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, maaxReplicas should be defined and more than one")
+		}
+
+		if r.Spec.MinReplicas != nil && *r.Spec.MinReplicas > *r.Spec.MaxReplicas {
+			return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, minReplicas could be more than maxReplicas")
+		}
+	}
+
 	return nil
 }