go-micro服务注册到etcd连接不上retrying of unary invoker failed

服务启动： ```./service --registry=etcd --registry_address=http://ip:2379``` 此处ip是其他服务器，可以ping通 ```shell Starting [service] go.micro.srv.user 2020-03-16 17:51:38 Server [grpc] Listening on [::]:36693 2020-03-16 17:51:38 Registry [etcd] Registering node: go.micro.srv.user-84597f93-d2b4-4032-ab33-946ab2782c6e {"level":"warn","ts":"2020-03-16T17:51:43.175+0800","caller":"clientv3/retry_interceptor.go:61","msg":"retrying of unary invoker failed","target":"endpoint://client-a42972f7-2140-4f82-8cc0-ac00e29d34d0/127.0.0.1:2379","attempt":0,"error":"rpc error: code = DeadlineExceeded desc = latest connection error: connection error: desc = \"transport: Error while dialing dial tcp 127.0.0.1:2379: connect: connection refused\""} 2020-03-16 17:51:43 Server register error: %!(EXTRA context.deadlineExceededError=context deadline exceeded) ``` 还是注册到本地，而没有注册到远程etcd，不知道哪里出错。