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user977828
Asked: 2021-05-14 22:59:14 +0800 CST

Django 导致无法与 Docker 连接

  • 772

我找到了一个 Django 项目，但未能通过以下方式在 Docker 容器中运行：

  1. git clone https://github.com/hotdogee/django-blast.git

  2. $ cat requirements.txt

    #psycopg2==2.6.0 # 如果使用 postgreSQL 作为数据库后端

我有以下 Dockerfile：

FROM python:2.7

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        postgresql-client \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /usr/src/app
COPY requirements.txt ./
RUN pip install -r requirements.txt
COPY . .

EXPOSE 8000
CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

接下来，我跑了：

$ docker run --name some-django-app -p 8000:8000 -d my-django-app
4202d7b2b47603e32dc800d3fbedbfaf4363f8cafe45684242aa3bb2b0eba257

最后，我输入http://localhost:8000/并得到了Firefox can’t establish a connection to the server at localhost:8000.

我错过了什么？

先感谢您

django docker

1 个回答

  1. Best Answer

    在您的 requirements.txt 中，将 kombo 版本更改为 3.0.30。这将解决第一个错误：

    我刚刚复制了你的步骤。通过做docker logs some-django-app我已经看到了：

    Traceback (most recent call last):

  File "manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()

  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 303, in execute

    settings.INSTALLED_APPS
  File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 48, in __getattr__
    self._setup(name)
  File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 44, in _setup
    self._wrapped = Settings(settings_module)
  File "/usr/local/lib/python2.7/site-packages/django/conf/__init__.py", line 92, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/local/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/src/app/i5k/__init__.py", line 5, in <module>
    from .celery import app as celery_app
  File "/usr/src/app/i5k/celery.py", line 5, in <module>
    from celery import Celery
  File "/usr/local/lib/python2.7/site-packages/celery/__init__.py", line 130, in <module>
    from celery import five
  File "/usr/local/lib/python2.7/site-packages/celery/five.py", line 149, in <module>
    from kombu.utils.compat import OrderedDict  # noqa
  File "/usr/local/lib/python2.7/site-packages/kombu/utils/__init__.py", line 19, in <module>
    from uuid import UUID, uuid4 as _uuid4, _uuid_generate_random
ImportError: cannot import name _uuid_generate_random

    而这似乎正是这个问题。

    当您修复 kombo 版本时，会出现一个新错误（使用 docker 日志检查）：

     [root@:/.../django-blast]# docker logs test
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 312, in execute
    django.setup()
  File "/usr/local/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/usr/local/lib/python2.7/site-packages/django/apps/config.py", line 112, in create
    mod = import_module(mod_path)
  File "/usr/local/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/local/lib/python2.7/site-packages/django/contrib/postgres/apps.py", line 7, in <module>
    from .signals import register_hstore_handler
  File "/usr/local/lib/python2.7/site-packages/django/contrib/postgres/signals.py", line 1, in <module>
    from psycopg2 import ProgrammingError
ImportError: No module named psycopg2

    而且好像还需要你不想用的包……

    # grep -ir psycopg2
webapollo/models.py:import psycopg2
webapollo/models.py:            conn = psycopg2.connect('dbname=' + self.db_name + ' user=' + self.db_acct + ' host=' + self.host)
webapollo/models.py:        conn = psycopg2.connect('dbname=' + species.db_name + ' user=' + species.db_acct + ' host=' + species.host)
webapollo/models.py:        conn = psycopg2.connect('dbname=' + species.db_name + ' user=' + species.db_acct + ' host=' + species.host)
i5k/settings_prod.py:    'ENGINE': 'django.db.backends.postgresql_psycopg2',
i5k/settings.py:    'ENGINE': 'django.db.backends.postgresql_psycopg2',

    您可以继续以这种方式工作，或者只是完全迁移到较新的 python 版本。

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