Linux Ops Smart Journey

Nov 20, 2025 · Cloud Native

Mastering Envoy Request Mirroring: Safe Shadow Testing for Production Traffic

This article explains Envoy's request mirroring feature, shows how it copies live HTTP requests to a test backend without affecting the original response, and provides step‑by‑step configuration examples for mirroring all traffic, selective paths, percentage‑based sampling, and header‑driven routing, plus practical tips and typical use cases.