pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 111] 连接被拒绝

Question

I am trying to use docker-compose with my django-rest app. When I run it myself python manage.py runserver it works well.

If I am trying to use docker-compose sudo docker-compose up it also runs the server but when I open the page in the browser I get an error.

pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused

I already have db, so I am just using this lines in settings.py

MONGODB_DATABASES = {
    "default": {
        "name": 'api',
        "host": 'localhost',
       "port": 27017
    },
}

Here is my Dockerfile:

FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
COPY . /code
RUN pip install -r requirements.txt

My docker-compose.yml:

version: '3.0'
services:
  web:
    build: .
    command: python manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
  mongo:
    image: mongo

Already tried this:

Pymongo keeps refusing the connection at 27017

Answer 1

By default Compose sets up a single network for your app. Each container for a service joins the default network and is both reachable by other containers on that network, and discoverable by them at a hostname identical to the container name.

According to the docker-compose.yaml file, mongo container is accessible on mongo:27017 from web container, so settings.py should be changed to:

MONGODB_DATABASES = {
    "default": {
        "name": 'api',
        "host": 'mongo',
       "port": 27017
    },
}

Answer 2

I had the same problem.

The issue was that I used the wrong port forwarding and had an old container which was stopped but not removed.

I restarted the old container. Now it's working fine.

Answer 3

As described in the other answers the problem is related to the mongo container name in the docker-compose.yml file so the Django settings must be changed to find the correct database host.

In later versions Djongo changed the DATABASE options in the settings.py . This will result in the following new settings.py part:

DATABASES = {
    'default': {
        'ENGINE': 'djongo',
        'NAME': 'api',
        'CLIENT': {
            'host': 'mongo',
            'port': 27017,
        }
    }
}

Notice that host and port are now childs of CLIENT .

More information can be found in the Djongo documentation .

Answer 4

What worked for me was simply list all the containers with

docker ps -a

CONTAINER ID        
q624462b055d        
f9324d078256        
r0888c63d21d        
tf5a32702bee        
e68d1ae9b74c

and delete the mongodb related ones using their IDs

docker rm q624462b055d f9324d078256

and change the host and port in the docker-compose file with

DATABASES = {
    'default': {
        'ENGINE': 'djongo',
        'NAME': 'mongo,',
        'HOST': 'mongo',
        'PORT': 27017,
    }
}