"beta-region",
		},
		{
			"No label defined at all",
			&v1.Node{},
			"",
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			got := getLabelValue(test.node.ObjectMeta, NodeRegionLabel, NodeRegionLabelGA)
			if test.expectedLabelValue != got {
				t.Errorf("Expected %v, but got %v", test.expectedLabelValue, got)
			}
		})
	}
}

	"istio.io/api/annotation"
	"istio.io/istio/pilot/pkg/model"
	"istio.io/istio/pkg/config"
	"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/config/host"
	"istio.io/istio/pkg/config/labels"
)

func getLabelValue(metadata metav1.ObjectMeta, label string, fallBackLabel string) string {
	metaLabels := metadata.GetLabels()
	val := metaLabels[label]
	if val != "" {
		return val
	}

	return metaLabels[fallBackLabel]
}

			log.Warnf("unable to get node %q for pod %q/%q", pod.Spec.NodeName, pod.Namespace, pod.Name)
		}
		return ""
	}

	region := getLabelValue(node.ObjectMeta, NodeRegionLabelGA, NodeRegionLabel)
	zone := getLabelValue(node.ObjectMeta, NodeZoneLabelGA, NodeZoneLabel)
	subzone := getLabelValue(node.ObjectMeta, label.TopologySubzone.Name, "")

	if region == "" && zone == "" && subzone == "" {
		return ""
	}