istio v1.13.3

VirtualService.spec.http[].match.headers.[key].spec.tcp.route.destination

VirtualService.spec.http[].match.headers.[key].spec.tcp.route.destination fields and descriptions
Field / Type	Description
host `string`	The name of a service from the service registry.
port `object`	Specifies the port on the host that is being addressed.
subset `string`	The name of a subset within the service.