如何构建docker镜像以引用venv中的python库

Question

我正在尝试对接我的Django web应用程序，它在虚拟环境venv上运行。

这是我的Dockerfile的配置：

FROM ppc64le/python:2.7

ENV PYTHONUNBUFFERED 1 
ENV DJANGO_SETTINGS_MODULE=agricultureProj.settings.deploy 
ENV UWSGI_VIRTUALENV=/venv 
UWSGI_WSGI_FILE=agricultureProj/wsgi.py 
UWSGI_HTTP=:8005 
UWSGI_MASTER=1 
UWSGI_WORKERS=2 
UWSGI_THREADS=8 
UWSGI_UID=1000 
UWSGI_GID=2000 
UWSGI_LAZY_APPS=1 
UWSGI_WSGI_ENV_BEHAVIOR=holy

RUN virtualenv venv 
RUN source /venv/bin/activate 
RUN mkdir /code 
WORKDIR /code   

ADD requirements.txt /code/ 
RUN pip install -r requirements.txt

ADD . /code/

EXPOSE 8005

COPY ./docker-entrypoint.sh / 
RUN chmod uog+rx ./docker-entrypoint.sh 
ENTRYPOINT ["sh","/docker-entrypoint.sh"]

CMD ["/venv/bin/activate", "--http-auto-chunked", "--http-keepalive"

我想知道我应该如何定义我的Dockerfile，这样我就可以直接引用现有的Python库，并成功地构建和合成为此运行我的docker镜像。

**Append：

这是我在成功构建docker镜像后遇到的错误。

错误：

Recreating agricultureproj_db_1
Recreating agricultureproj_web_1
Attaching to agricultureproj_db_1, agricultureproj_web_1
db_1   | /docker-entrypoint.sh: 3: /docker-entrypoint.sh: source: not found
web_1  | ----------
db_1   | ----------
web_1  | ['/home/ppt/Elephas2/agricultureProj_v6_723/agricultureProj',
db_1   | ['/home/ppt/Elephas2/agricultureProj_v6_723/agricultureProj',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/plat-powerpc64le-linux-gnu',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/plat-powerpc64le-linux-gnu',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-tk',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-tk',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-old',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-old',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-dynload',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-dynload',
web_1  |  '/usr/lib/python2.7',
db_1   |  '/usr/lib/python2.7',
web_1  |  '/usr/lib/python2.7/plat-powerpc64le-linux-gnu',
db_1   |  '/usr/lib/python2.7/plat-powerpc64le-linux-gnu',
web_1  |  '/usr/lib/python2.7/lib-tk',
db_1   |  '/usr/lib/python2.7/lib-tk',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/local/lib/python2.7/site-packages',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/local/lib/python2.7/site-packages',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/site-packages',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/site-packages',
web_1  |  '/usr/lib/python2.7/dist-packages',
db_1   |  '/usr/lib/python2.7/dist-packages',
web_1  |  '/usr/lib/python2.7/dist-packages/cv2.powerpc64le-linux-gnu.so']
db_1   |  '/usr/lib/python2.7/dist-packages/cv2.powerpc64le-linux-gnu.so']
web_1  | ----------
db_1   | ----------
web_1  | Traceback (most recent call last):
web_1  |   File "manage.py", line 37, in <module>
db_1   | Traceback (most recent call last):
web_1  |     "Couldn't import Django. Are you sure it's installed and "
db_1   |   File "manage.py", line 37, in <module>
web_1  | ImportError: Couldn't import Django. Are you sure it's installed and 
available on your PYTHONPATH environment variable? Did you forget to activate 
a virtual environment?
db_1   |     "Couldn't import Django. Are you sure it's installed and "
web_1  | ----------
db_1   | ImportError: Couldn't import Django. Are you sure it's installed and 
available on your PYTHONPATH environment variable? Did you forget to activate 
a virtual environment?
web_1  | ['/home/ppt/Elephas2/agricultureProj_v6_723/agricultureProj',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/plat-powerpc64le-linux-gnu',
db_1   | ----------
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-tk',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-old',
db_1   | ['/home/ppt/Elephas2/agricultureProj_v6_723/agricultureProj',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-dynload',
web_1  |  '/usr/lib/python2.7',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7',
web_1  |  '/usr/lib/python2.7/plat-powerpc64le-linux-gnu',
web_1  |  '/usr/lib/python2.7/lib-tk',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/plat-powerpc64le-linux-gnu',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/local/lib/python2.7/site-packages',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-tk',
web_1  |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/site-packages',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-old',
web_1  |  '/usr/lib/python2.7/dist-packages',
web_1  |  '/usr/lib/python2.7/dist-packages/cv2.powerpc64le-linux-gnu.so']
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/lib-dynload',
web_1  | ----------
db_1   |  '/usr/lib/python2.7',
db_1   |  '/usr/lib/python2.7/plat-powerpc64le-linux-gnu',
web_1  | Traceback (most recent call last):
web_1  |   File "manage.py", line 37, in <module>
web_1  |     "Couldn't import Django. Are you sure it's installed and "
db_1   |  '/usr/lib/python2.7/lib-tk',
web_1  | ImportError: Couldn't import Django. Are you sure it's installed and 
available on your PYTHONPATH environment variable? Did you forget to activate 
a virtual environment?
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/local/lib/python2.7/site-packages',
db_1   |  '/home/ppt/Elephas2/agricultureProj_v6_723
/agricultureProj/venv/lib/python2.7/site-packages',
db_1   |  '/usr/lib/python2.7/dist-packages',
db_1   |  '/usr/lib/python2.7/dist-packages/cv2.powerpc64le-linux-gnu.so']
db_1   | ----------
db_1   | Traceback (most recent call last):
db_1   |   File "manage.py", line 37, in <module>
db_1   |     "Couldn't import Django. Are you sure it's installed and "
db_1   | ImportError: Couldn't import Django. Are you sure it's installed and 
available on your PYTHONPATH environment variable? Did you forget to activate 
a virtual environment?
agricultureproj_web_1 exited with code 1
agricultureproj_db_1 exited with code 1
ppt@server:~/Elephas2/agricultureProj_v6_723/agricultureProj$ File 
"manage.py", line 37, in <module>
-bash: syntax error near unexpected token `newline'
ppt@server:~/Elephas2/agricultureProj_v6_723/agricultureProj$ db_1   |     
"Couldn't import Django. Are you sure it's installed and "
db_1: command not found
Couldn't import Django. Are you sure it's installed and : command not found
ppt@server:~/Elephas2/agricultureProj_v6_723/agricultureProj$ db_1   | 
ImportError: Couldn't import Django. Are you sure it's installed and 
available on 
your PYTHONPATH environment variable? Did you forget to activate a virtual 
environment?
db_1: command not found
ImportError:: command not found

当我尝试对创建的图像进行docker合成时，环境无法导入Django。

Answer 1

不要激活虚拟环境，只需将其bin目录添加到PATH环境变量的开头即可。这通常就足够了。

您还应该避免以root身份运行映像。即使在容器中，这也不是一个好的做法。

Answer 2

您可以使用-- system -site-package来指示venv优先使用系统库，这意味着更改此行，然后指示pip忽略系统安装的库

RUN virtualenv --system-site-packages venv 
RUN source /venv/bin/activate 
RUN mkdir /code WORKDIR /code
ADD requirements.txt /code/ 
RUN pip install --ignore-installed -r requirements.txt