python - 加载 http ://0. 0.0.0:27017 时 mac os 上的 Docker mongodb 连接被拒绝

Question

Browser Screenshot我有 2 个运行 mongo:3.0.3 和 python:2.7 的 docker 容器。我有一个连接到 mongodb 实例的 app.py。在我的 app.py 中，我使用端口 5000 映射 27017。app.py 运行正常，但是当我访问 http://0.0.0.0:5000 时此连接被拒绝错误出现在终端上。

172.17.0.1 - - [01/Jul/2018 10:01:32] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/pythonApp/app.py", line 16, in form
    if posts.count()!=0:
  File "/usr/local/lib/python2.7/site-packages/pymongo/collection.py", line 1023, in count
    return self._count(cmd)
  File "/usr/local/lib/python2.7/site-packages/pymongo/collection.py", line 985, in _count
    with self._socket_for_reads() as (sock_info, slave_ok):
  File "/usr/local/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/usr/local/lib/python2.7/site-packages/pymongo/mongo_client.py", line 699, in _socket_for_reads
    with self._get_socket(read_preference) as sock_info:
  File "/usr/local/lib/python2.7/contextlib.py", line 17, in __enter__
    return self.gen.next()
  File "/usr/local/lib/python2.7/site-packages/pymongo/mongo_client.py", line 663, in _get_socket
    server = self._get_topology().select_server(selector)
  File "/usr/local/lib/python2.7/site-packages/pymongo/topology.py", line 121, in select_server
address))
  File "/usr/local/lib/python2.7/site-packages/pymongo/topology.py", line 97, in select_servers
    self._error_message(selector))
ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused

我找不到任何 .conf 文件，因为这是一个容器。关于如何解决这个问题的任何想法？ :/

我的 docker 镜像 https://hub.docker.com/r/sizijay/dockerexercise/查看 dockerfile 的详细描述

Answer 1

运行 Mongo 容器:

$ docker run -d -p "27017:27017" mongo 

在您的 app.py 中，使用 pymongo Connection。

from pymongo import Connection
c = Connection(host=0.0.0.0, port=27017)
c.test_database

注意主机是0.0.0.0。

运行你的容器:

$ docker run -d -p 5000:5000 sizijay/dockerexercise

如果您使用 localhost 作为您的主机，pymongo 将查看正在运行的容器内部(即 sizijay/dockerexercise)。当您使用 0.0.0.0 时，连接将连接到您的主机，它现在将端口 27017 绑定(bind)到您的 mongo 容器内的 27017。

---

更好的选择是使用 docker-compose 链接您的容器。

在这种情况下，您需要创建一个文件:docker-compose.yml:

version: '3'

services:
  db:
    image: mongo
    ports:
      - "27017:27017"

  myapp:
    image: sizijay/dockerexercise
    ports:
      - "5000:5000"
    links:
      - db
    depends_on:
      - db

在您的 app.py 中，使用 pymongo Connection。

from pymongo import Connection
c = Connection(host='db', port=27017)
c.test_database

注意:主机是db。

现在您的主机不在您的app 容器内，而是在db 服务(即mongo 容器)内。

您可以通过以下方式运行 docker-compose:

$ docker build -t sizijay/dockerexercise .
$ cd location_of_docker-compose.yml
$ docker-compose up