failed to connect to all addresses

[valentinc94]

https://djangogrpcframework.readthedocs.io/en/latest/quickstart.html

I did this tutorial but when executing this:

with grpc.insecure_channel('localhost:50051') as channel: stub = account_pb2_grpc.UserControllerStub(channel) for user in stub.List(account_pb2.UserListRequest()): print(user, end='')

always return

grpc._channel._MultiThreadedRendezvous: <_MultiThreadedRendezvous of RPC that terminated with: status = StatusCode.UNAVAILABLE details = "failed to connect to all addresses" debug_error_string = "{"created":"@1605744210.127297754","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":4165,"referenced_errors":[{"created":"@1605744210.127291858","description":"failed to connect to all addresses","file":"src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":397,"grpc_status":14}]}"

i have a docker for this project

version: '3'

services: db: image: postgres env_file:

• ./backend/.env ports:
• "6543:5432"
  networks:
• webappnetwork backend: build: ./backend volumes:
• ./backend/:/code env_file:
• ./backend/.env ports:
• "8000:8000" command: python manage.py runserver 0.0.0.0:8000 depends_on:
• db networks:
• webappnetwork grpc: build: ./backend volumes:
• ./backend/:/code env_file:
• ./backend/.env ports:
• "50051:50051" command: python manage.py grpcrunserver --dev depends_on:
• db
• backend networks:
• webappnetwork

networks: webappnetwork: driver: bridge

volumes: database-data: pgadmin-data: