improve ingress health check

pkg/health/health_ingress.go

@@ -1,11 +1,19 @@
 package health
 
 import (
+	"fmt"
+
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 )
 
 func getIngressHealth(obj *unstructured.Unstructured) (*HealthStatus, error) {
-	ingresses, _, _ := unstructured.NestedSlice(obj.Object, "status", "loadBalancer", "ingress")
+	ingresses, found, err := unstructured.NestedSlice(obj.Object, "status", "loadBalancer", "ingress")
+	if err != nil {
+		return &HealthStatus{Status: HealthStatusError, Message: fmt.Sprintf("failed to ingress status: %v", err)}, nil
+	} else if !found {
+		return &HealthStatus{Status: HealthStatusPending, Message: "ingress loadbalancer status not found"}, nil
+	}
+
 	health := HealthStatus{}
 	if len(ingresses) > 0 {
 		health.Status = HealthStatusHealthy