area/tracingenhancementhelp wanted
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説明
Apache Skywalking introduced Configuration Discovery Service(CDS) feature.
https://github.com/apache/skywalking/issues/6114
It works like Envoy xDS but Skywalking as control plane of Skywalking agent. Today, we can use Envoy as Skywalking agent, then this functionality should be applied to Envoy also. It works not like xDS but establishing unary gRPC periodically, like a healthcheck agent. Currently it is WIP in Skywalking C++ SDK, but I will introduce this feature without using SDK's gRPC native client but using Envoy gRPC because of gRPC abstraction shouldn't be ignored. https://github.com/SkyAPM/cpp2sky/pull/61