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app.py，它连接到mongodb实例。在我的app.py中，我已使用端口5000映射到27017。app.py运行良好，但是当我访问http://0.0.0.0:5000时，此连接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。关于如何解决此问题的任何想法？：/

我的docker映像https://hub.docker.com/r/sizijay/dockerexercise/ 查看dockerfile的详细说明

Answer 1

运行Mongo容器：

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

在您的 app.py 中，使用 pymongo 连接。

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 。

运行容器：

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

如果您使用 localhost 作为主机，则 pymongo 将在运行容器的内部（即 sizijay / dockerexercise ）。当您使用 0.0.0.0 时，连接将连接到您的主机，该主机现在在mongo容器中具有绑定到27017的端口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 连接。

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

注意：主机是 db 。

现在，主机不在 app 容器中，而是在 db 服务（即mongo容器）中。

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

Answer 2

另一种解决方案-不使用 docker-compose -通过使用--network中的docker run标志在同一网桥网络上运行两个容器这两个容器的命令：

docker run -p 27017:27017 --name mongo1 -d --network sizijaynetwork mongo

docker run -p 5000:5000 --name app1 -d --network sizijaynetwork appimage

然后在您的Python脚本中可以执行以下操作：

from pymongo import MongoClient
client = MongoClient(host = 'mongo1', port = 27017)
db = client.databaseName

请注意，主机名应该是您分配给Mongo容器的名称，并且如果不使用--name标志，只需使用容器的默认名称，您可以在 NAMES下找到当您执行docker ps

Answer 3

在我使用Mongoengine时，连接参数是

    db = connect(<database name>, host='mongo-server', port=27017)

我的docker-compose.yml是

    version: "3.4"
    services:
    ...
    ...
        db:
           image: mongo:3.4
           container_name: mongo-server
           ports:
               - "27015:27017"

我能够从作为Docker容器运行的Web应用程序连接mongodb。

加载http://0.0.0.0:27017时，macOS上的Docker mongodb连接被拒绝

3 个答案: