python 客户端在烧瓶中使用时 Grpc 请求失败

Question

我有一个 Flask 应用程序，当向 Flask 端点发出请求时，它需要向 grpc 服务器发出请求。

@main.route("/someroute", methods=["POST"])
def some_function():
    # Do something here
    make_grpc_request(somedata)
    return create_response(data=None, message="Something happened")


def make_grpc_request(somedata):
    channel = grpc.insecure_channel('localhost:30001')
    stub = some_proto_pb2_grpc.SomeServiceStub(channel)
    request = some_proto_pb2.SomeRequest(id=1)
    response = stub.SomeFunction(request)
    logger.info(response)

但我一直收到错误消息InactiveRpcError of RPC that terminated with: StatusCode.UNAVAILABLE failed to connect to all addresses

只需将客户端代码放入一个普通的 .py 文件中就可以了，在 BloomRPC 中发出请求也可以正常工作，所以这不可能是服务器问题。

这与 Flask 的工作原理有关吗？我只是遗漏了什么？

我也试过使用 https://github.com/public/sonora 但没有像这样成功：

with sonora.client.insecure_web_channel("localhost:30001") as channel:
    stub = some_proto_pb2_grpc.SomeServiceStub(channel)
    request = some_proto_pb2.SomeRequest(id=1)
    response = stub.SomeFunction(request)

docker-compose.yml

version: "3.7"

services:
  core-profile: #This is where the grpc requests are sent to
    container_name: core-profile
    build:
      context: ./app/profile/
      target: local
    volumes:
      - ./app/profile/:/usr/src/app/
    env_file:
      - ./app/profile/database.env
      - ./app/profile/jwt.env
      - ./app/profile/oauth2-dev.env
    environment:
      - APP_PORT=50051
      - PYTHONUNBUFFERED=1
      - POSTGRES_HOST=core-profile-db
    ports:
      - 30001:50051
    expose:
      - 50051
    depends_on:
      - core-profile-db

  core-profile-db:
    image: postgres:10-alpine
    expose:
      - 5432
    ports:
      - 54321:5432
    env_file:
      - ./app/profile/database.env

  app-flask-server-db:
    image: postgres:10-alpine
    expose:
      - 5433
    ports:
      - 54333:5433
    env_file:
      - ./app/flask-server/.env

  flask-server:
    build:
      context: ./app/flask-server/
      dockerfile: Dockerfile-dev
    volumes:
      - ./app/flask-server:/usr/src/app/
    env_file:
      - ./app/flask-server/.env
    environment:
      - FLASK_ENV=docker
    ports:
      - 5000:5000
    depends_on:
      - app-flask-server-db

volumes:
  app-flask-server-db:
    name: app-flask-server-db

Answer 1

您的 Python 应用（服务）应将 gRPC 服务引用为 core-profile:50051。

主机名是 Compose 服务 core-profile，因为 Python 服务也在 Compose 网络中，它必须使用 50051.

localhost:30001 是您从 Compose 主机访问它的方式

python 客户端在烧瓶中使用时 Grpc 请求失败

Grpc requests failing when python client used inside flask

python

flask

grpc

grpc-python