How does Envoy facilitate traffic mirroring?

Envoy facilitates traffic mirroring by allowing a seamless duplication of live traffic to a different service or environment for testing purposes without impacting the original application's response. This technique enables teams to understand how new features would perform under real-world conditions without exposing users to potential issues or bugs.

In this way, developers can analyze the behavior of the new service or feature in a controlled manner, collect performance metrics, and gain insights into its operation and response patterns. Since the mirrored traffic does not interfere with the production traffic, users receive their responses as expected, ensuring a smooth experience while enabling robust testing simultaneously. This approach is especially valuable for validating changes in microservices architecture, where individual components can be tested in a realistic setting without the risks associated with live deployments.