The danglingroutedestinationhost vetter inspects the
VirtualService(s)
resources in your cluster and generates warning notes if any of the route
destination
hosts
point to services which don't exist in the cluster. Any HTTP request routed
to these hosts will return a 503 Service Unavailable response code as there is
no backend service to fulfill the request.
Note that only route destination hosts ending in .svc.cluster.local and short
names (host which don't contain any .) are inspected by this vetter as
these hosts are implemented by services in the cluster.
It is recommended to either create the service(s) mentioned in the VirtualService(s) resources or update the VirtualService(s) to route to existing services in the cluster.