Zone field contains Zone name where ingress is serving, field will be
automatically set by Global Kuma CP
Networking defines the address and port of the Ingress to listen on.
Additionally publicly advertised address and port could be specified.
Address on which inbound listener will be exposed
AdvertisedAddress defines IP or DNS name on which ZoneIngress is
accessible to other Kuma clusters.
Port of the inbound interface that will forward requests to the service.
AdvertisedPort defines port on which ZoneIngress is accessible to other
Admin contains configuration related to Envoy Admin API
Port on which Envoy Admin API server will be listening
availableServices (optional, repeated)
AvailableService contains tags that represent unique subset of
tags of the service
number of instances available for given tags
mesh of the instances available for given tags
instance of external service available from the zone