A policy that specifies how requests intended for the route's
backends are shadowed to a separate mirrored backend service.
The load balancer doesn't wait for responses from the shadow
service. Before sending traffic to the shadow service, the host
or authority header is suffixed with -shadow.
Attribute
Name
Description
backend_service
str
The full or partial URL to the BackendService
resource being mirrored to. The backend service
configured for a mirroring policy must reference
backends that are of the same type as the
original backend service matched in the URL map.
Serverless NEG backends are not currently
supported as a mirrored backend service.
This field is a member of oneof_ _backend_service.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-06-26 UTC."],[],[]]