Django 導致無法與 Docker 連接

我找到了一個 Django 項目，但未能通過以下方式在 Docker 容器中執行：

1. git clone https://github.com/hotdogee/django-blast.git
2. $ cat requirements.txt

#psycopg2==2.6.0 # 如果使用 postgreSQL 作為數據庫後端

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"]

接下來，我跑了：

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

最後，我輸入http://localhost:8000/並得到了Firefox can’t establish a connection to the server at localhost:8000.

我錯過了什麼？

先感謝您

在您的 requirements.txt 中，將 kombo 版本更改為 3.0.30。這將解決第一個錯誤：

我剛剛複制了你的步驟。通過做docker logs some-django-app我已經看到了：

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

而這似乎正是這個問題。

當您修復 kombo 版本時，會出現一個新錯誤（使用 docker 日誌檢查）：

[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

而且好像還需要你不想用的包……

# 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',

您可以繼續以這種方式工作，或者只是完全遷移到較新的 python 版本。

引用自：https://serverfault.com/questions/1063507