Django：在Docker容器中運行時找不到模塊

Question

我正在Docker容器中運行Django項目，我想添加一個模塊（特別是django-prometheus ）

我跑了： pip install django-prometheus和docker run -p 9090:9090 prom/prometheus成功，並且按照自述文件中的說明對我的settings.py和urls.py文件進行了必要的更改。

然后，我重建了項目並重新啟動它，但是它給我錯誤ModuleNotFoundError: No module named 'django_prometheus'

（完整的錯誤報告：

Traceback (most recent call last):
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
api_1           |     worker.init_process()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 129, in init_process
api_1           |     self.load_wsgi()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
api_1           |     self.wsgi = self.app.wsgi()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
api_1           |     self.callable = self.load()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
api_1           |     return self.load_wsgiapp()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
api_1           |     return util.import_app(self.app_uri)
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/util.py", line 350, in import_app
api_1           |     __import__(module)
api_1           |   File "/usr/src/app/project/wsgi.py", line 16, in <module>
api_1           |     application = get_wsgi_application()
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
api_1           |     django.setup(set_prefix=False)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/__init__.py", line 24, in setup
api_1           |     apps.populate(settings.INSTALLED_APPS)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/apps/registry.py", line 89, in populate
api_1           |     app_config = AppConfig.create(entry)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/apps/config.py", line 90, in create
api_1           |     module = import_module(entry)
api_1           |   File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
api_1           |     return _bootstrap._gcd_import(name[level:], package, level)
api_1           | ModuleNotFoundError: No module named 'django_prometheus'
api_1           | [2019-07-01 12:19:36 +0200] [16] [INFO] Worker exiting (pid: 16)

）

在添加此模塊之前，該項目運行良好，我缺少什么？

Answer 1

在您的Dockerfile中，應確保您具有pip install命令。 請看下面的例子。 Prometheus模塊應在requirements.txt文件中列出。

RUN apt-get update \
&& apt-get install -y --no-install-recommends software-properties-common \
&& apt-get update \
&& apt-get install -q -y --no-install-recommends python3 python3-dev python3-pip python3-setuptools python3-wheel gcc \
&& apt-get install -q -y vim \
&& apt-get clean 

ADD requirements.txt /app/requirements.txt
RUN pip3 install -r /app/requirements.txt

# Add the application source code.
ADD . /app