使用gRPC连接两台机器

Question

我有一个gRPC项目，在同一台机器上正确运行服务器和客户端，但是当我在使用IPV4的相同wifi网络中使用不同的机器时，它在客户端发生以下错误:

Traceback (most recent call last):
File "client.py", line 29, in <module>
run()
File "client.py", line 25, in run
add_reply = stub.Add(add_request)
File "/home/caio/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 946, in __call__
return _end_unary_response_blocking(state, call, False, None)
File "/home/caio/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 849, in _end_unary_response_blocking
raise _InactiveRpcError(state)
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.100.9:50051: tcp handshaker shutdown"
debug_error_string = "UNKNOWN:failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.100.9:50051: tcp handshaker shutdown {grpc_status:14, created_time:"2022-12-10T15:21:32.619696358-03:00"}"
>

似乎有人报告说它对他们有效，但似乎没有太大的不同，所以我不知道缺少什么。服务器代码:

from os import system
system('clear')
from concurrent import futures
import time
import grpc
from grpc import _server
import sum_pb2
import sum_pb2_grpc
PORT = 50051
HOST = "localhost"
class Servicer(sum_pb2_grpc.SumNumbersServicer):
def Add(self, request, context):
print(request)
add_reply = sum_pb2.AddReply()
add_reply.r = request.a + request.b

# return super().Add(request, context)
return add_reply
def serve():
server:_server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
sum_pb2_grpc.add_SumNumbersServicer_to_server(Servicer(), server)
# serve._add_insecure_port(f"localhost:{PORT}")
server.add_insecure_port(f"{HOST}:{PORT}")
server.start()
print(f"Listenning on port {PORT}")
try:
server.wait_for_termination()
except KeyboardInterrupt:
server.stop(0)
if __name__ == "__main__":
serve()

客户机代码:

from os import system
system('clear')
from concurrent import futures
import time
from random import randint
import grpc
from grpc import _server
import sum_pb2
import sum_pb2_grpc
PORT = 50051
HOST = "localhost"
HOST = "192.168.100.9"
min = 0
max = 100
def run():
with grpc.insecure_channel(f"{HOST}:{PORT}") as channel:
stub = sum_pb2_grpc.SumNumbersStub(channel)
a = randint(min, max)
b = randint(min, max)
add_request = sum_pb2.AddRequest(a= a, b= b)
add_reply = stub.Add(add_request)
print(f"{a} + {b} = {add_reply}")
if __name__ == "__main__":
run()

编辑:当使用"0.0.0.0"作为server.py中的host，它打印以下错误(与上次不同，这次我在两台机器上使用以太网电缆，不知道是否有区别):

Traceback (most recent call last):
File "client.py", line 29, in <module>
run()
File "client.py", line 25, in run
add_reply = stub.Add(add_request)
File "/home/estagiarioti/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 946, in __call__
return _end_unary_response_blocking(state, call, False, None)
File "/home/estagiarioti/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 849, in _end_unary_response_blocking
raise _InactiveRpcError(state)
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.10.6:50051: Failed to connect to remote host: No route to host"
debug_error_string = "UNKNOWN:failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.10.6:50051: Failed to connect to remote host: No route to host {grpc_status:14, created_time:"2022-12-12T13:58:15.049856347-03:00"}"
>

在wifi网络和&;0.0.0.0&;主机中的IP:

Traceback (most recent call last):
File "client.py", line 29, in <module>
run()
File "client.py", line 25, in run
add_reply = stub.Add(add_request)
File "/home/caio/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 946, in __call__
return _end_unary_response_blocking(state, call, False, None)
File "/home/caio/dev/laboratorio/mygrpc/.env/lib/python3.8/site-packages/grpc/_channel.py", line 849, in _end_unary_response_blocking
raise _InactiveRpcError(state)
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.100.9:50051: tcp handshaker shutdown"
debug_error_string = "UNKNOWN:failed to connect to all addresses; last error: UNKNOWN: ipv4:192.168.100.9:50051: tcp handshaker shutdown {created_time:"2022-12-12T19:12:13.762636131-03:00", grpc_status:14}"
>

ps:有时我使用WSL，有时我不知道，也许知道这一点很重要。

Answer 1

localhost通常解析为127.0.0.1，这是一个特殊的所谓环回网络地址。当你知道你不需要外部(到主机)连接时使用它，因为它通常不使用主机的网络堆栈。

您通常希望将服务器绑定到0.0.0.0。这将服务器绑定到所有主机的网络接口，并且是确保您的服务对外部主机可用的简单方法。

另外，您需要确信服务器的主机的网络地址是192.168.100.9，以确保客户端尝试与正确的主机通信。

Answer 2

我不知道我在WSL中做错了什么，但当我使用纯Windows和防火墙设置时，它工作了，我允许列表中的所有蟒蛇在公共和私有网络中访问。这是两台机器在同一个Wifi网络