我对这个示例做了一些修改：https://github.com/grpc/grpc-web/tree/master/net/grpc/gateway/examples/echo。我在具有开放端口8080的Docker容器上运行envoy（需要运行此代理服务器，因为浏览器无法直接与后端gRPC服务对话）。我正在本地主机（envoy docker容器的主机）上运行所有服务。但是，我似乎无法将docker容器中的envoy连接到主机上运行的服务。
我在容器中编译了grpc_cli，当我运行grpc_cli ls 192.168.1.10:9000（主机的LAN IP地址和运行该服务的端口）时，我得到了
root@bdc9ac396a87:~/grpc# ./bins/opt/grpc_cli ls 192.168.1.10:9000
Received an error when querying services endpoint.
ServerReflectionInfo rpc failed. Error code: 14, message: failed to connect to all addresses, debug info: {"created":"@1569023274.866465052","description":"Failed to pick subchannel","file"
:"src/core/ext/filters/client_channel/client_channel.cc","file_line":3876,"referenced_errors":[{"created":"@1569023274.866463178","description":"failed to connect to all addresses","file":"
src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":395,"grpc_status":14}]}
当我使用docker0接口的IP地址时，我得到几乎相同的错误，该地址也应该提供与主机的连接。
root@bdc9ac396a87:~/grpc# ./bins/opt/grpc_cli ls 172.17.0.1:9000
Received an error when querying services endpoint.
ServerReflectionInfo rpc failed. Error code: 14, message: failed to connect to all addresses, debug info: {"created":"@1569022455.801913949","description":"Failed to pick subchannel","file"
:"src/core/ext/filters/client_channel/client_channel.cc","file_line":3876,"referenced_errors":[{"created":"@1569022455.801910006","description":"failed to connect to all addresses","file":"
src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":395,"grpc_status":14}]}
但是，使用以下命令从主机运行简单的http服务器
python -m http.server
我可以从容器中很好地运行以下命令：
wget 172.17.0.1:8000/test.txt // works
wget 192.168.1.10:8000/test.txt // works
主机上（不在容器中）的客户端可以连接并与服务正常工作，因此这不是服务器问题。
docker是否会阻止某些类型的流量？在示例中，我注意到服务器被放置在另一个docker容器上，并且可以工作（对我来说也可以在本地工作），但是我更希望在构建和测试服务器时在我的主机上运行我的服务。在某处是否有设置可启用从容器到主机上的服务的gRPC？
Docker版本1.13.1，内部版本47e2230 / 1.13.1 Fedora 29