istio v1.31.0

VirtualService.spec.http[].route[].headers.request.add.spec.http.mirrors

Specifies the destinations to mirror HTTP traffic in addition to the original destination.

VirtualService.spec.http[].route[].headers.request.add.spec.http.mirrors fields and descriptions
Field / Type	Description
destination `object` required	Destination specifies the target of the mirror operation.
percentage `object`	Percentage of the traffic to be mirrored by the `destination` field.