Add creates a new PodLocality Controller and adds it to the Manager.

IstioSidecarStatusAnnotation is the annotation Istio adds to the pod when the sidecar is injected.

IstioSubzoneLabel is custom subzone label for locality-based routing in Kubernetes see: https://github.com/istio/istio/issues/19114.

NodeRegionLabel is the well-known label for kubernetes node region.

NodeRegionLabelGA is the well-known label for kubernetes node region in ga.

NodeZoneLabel is the well-known label for kubernetes node zone.

NodeZoneLabelGA is the well-known label for kubernetes node zone in ga.

PodLocalityReconciler copies the node's region/zone labels to the pod after it's scheduled to a node.