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python - 无法连接到在本地 Docker 容器中运行的 gRPC 服务

问题描述

我确实阅读了 [this similar question][1] 的答案，但它无助于为我解决问题。

我的设置：

在该配置中，一切正常。但是，如果我remote gRPC service在本地 Docker 容器中启动它（.py客户端仍然在本地运行）：

08:49:00.434005     7 server.cc:53] Server starting
08:49:00.435603     7 server.cc:59] Server listening on 0.0.0.0:9000

我用来运行 gRPC 服务的命令：sudo docker run --rm -it -u dud --net=host --entrypoint=/usr/local/bin/application COOL_APP

.py这是我的客户的一段代码：

HOST = 'localhost'
PORT = '9000'
with grpc.insecure_channel('{}:{}'.format(HOST, PORT)) as channel:

我收到以下错误（AFAIK 这意味着我的.py客户端无法连接到host:port我的 Docker 服务）：

Traceback (most recent call last):
  File "client.py", line 31, in <module>
    for record in reader:
  File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 367, in next
    return self._next()
  File "/usr/local/lib/python2.7/site-packages/grpc/_channel.py", line 358, in _next
    raise self
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
    status = StatusCode.UNAVAILABLE
    details = "Connect Failed"
    debug_error_string = "{"created":"@1550567018.554830000","description":"Failed to create subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":2261,"referenced_errors":[{"created":"@1550567018.554828000","description":"Pick Cancelled","file":"src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":245,"referenced_errors":[{"created":"@1550567018.554798000","description":"Connect Failed","file":"src/core/ext/filters/client_channel/subchannel.cc","file_line":867,"grpc_status":14,"referenced_errors":[{"created":"@1550567018.554789000","description":"Failed to connect to remote host: OS Error","errno":61,"file":"src/core/lib/iomgr/tcp_client_posix.cc","file_line":207,"os_error":"Connection refused","syscall":"connect","target_address":"ipv6:[::1]:9000"}]}]}]}"

我已经尝试在我的客户端中同时设置localhost:9000、0.0.0.0:9000和，但没有成功。:9000.py

我不确定这是否有意义，但是当我运行时：

user-dev:~ user$ lsof -i tcp:8080
COMMAND     PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
myservice 53941 user    6u  IPv4 0x40c50fcf1d04701d      0t0  TCP localhost:http-alt (LISTEN)
user-dev:~ user$ lsof -i tcp:9000

即，我的终端没有显示任何内容tcp:9000（我运行上面的命令来检查是否真的有东西在听localhost:9000）。

更新：当我运行hello-world[container][2] 时，-p 9000:9000我收到一个不同的错误：

debug_error_string = "{"created":"@1550580085.678869000","description":"Error received from peer","file":"src/core/lib/surface/call.cc","file_line":1036,"grpc_message":"Socket closed","grpc_status":14}"
``` so I assume something is wrong with my gRPC service image / Docker flags.


  [1]: https://stackoverflow.com/questions/43911793/cannot-connect-to-go-grpc-server-running-in-local-docker-container
  [2]: https://github.com/crccheck/docker-hello-world

标签： pythondockergrpcgrpc-python

解决方案

您需要告诉 docker 将端口对外公开。

尝试添加-p 9000:9000到您的 docker run 命令。

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