etcdctl/ctlv3/command: don't print gRPC WARNING logs by default
Despite holding important information, these are too noisy.
See
@@ -128,9 +128,11 @@ func clientConfigFromCmd(cmd *cobra.Command) *clientConfig {
fmt.Fprintf(os.Stderr, "%s=%v\n", flags.FlagToEnv("ETCDCTL", f.Name), f.Value)
})
} else {
- // Enable logging for WARNING and ERROR since these levels include issues with
- // connecting to the server, such as TLS misconfiguration.
- clientv3.SetLogger(grpclog.NewLoggerV2(ioutil.Discard, os.Stderr, os.Stderr))
+ // WARNING logs contain important information like TLS misconfirugation, but spams
+ // too many routine connection disconnects to turn on by default.
+ //
+ // See https://github.com/coreos/etcd/pull/9623 for background
+ clientv3.SetLogger(grpclog.NewLoggerV2(ioutil.Discard, ioutil.Discard, os.Stderr))
}
cfg := &clientConfig{}
