The v2 xDS API is not supported in Envoy v1.18.0 and above.
Metrics Service is configured as a built-in envoy.stat_sinks.metrics_service StatsSink. This opaque configuration will be used to create Metrics Service.
This extension may be referenced by the qualified name envoy.stat_sinks.metrics_service
This extension does not operate on the data plane and hence is intended to be robust against untrusted traffic.
This extension extends and can be used with the following extension category:
(core.GrpcService, REQUIRED) The upstream gRPC cluster that hosts the metrics service.