etcdserver: cherry pick of #9990 to release 3.1 #10030
Merged
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Cherry pick of #9990 to release-3.1.
This is to improve debuggability of etcd release-3.1. Added a grpc interceptor to log information on incoming requests to etcdserver.
During backporting, the following two dependencies are removed from the original PR:
This backporting also includes #10021. If debug level is disabled, skip logUnaryRequestStats() to avoid potential performance degradation.
/cc @gyuho @jpbetz