在 Alpine docker 上安装 Shapely

Question

我正在尝试将我的项目移至 docker，并且我一直在使用 alpine 变体。这是一个带有 postgres 数据库的 django 项目

这是我安装依赖项的方法：

...
ADD ./requirements.txt /srv/sites/mysite/requirements.txt

RUN echo "http://mirror.leaseweb.com/alpine/edge/testing" >> 
/etc/apk/repositories

RUN apk add --no-cache --virtual .build-deps \
build-base postgresql-dev libffi-dev gcc libc-dev linux-headers bash \
geos geos-dev jpeg-dev zlib-dev \
&& pip install -r requirements.txt \
&& find /usr/local \
    \( -type d -a -name test -o -name tests \) \
    -o \( -type f -a -name '*.pyc' -o -name '*.pyo' \) \
    -exec rm -rf '{}' + \
&& runDeps="$( \
    scanelf --needed --nobanner --recursive /usr/local \
            | awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
            | sort -u \
            | xargs -r apk info --installed \
            | sort -u \
)" \
&& apk add --virtual .rundeps $runDeps \
&& apk del .build-deps
...

geos geos-dev是 Shaply 的依赖项。一切都很顺利，直到我尝试启动网络服务器，因为我正在测试，我只是使用命令runserver，docker-compose结果是

web_1_ba4690531efe | Traceback (most recent call last):
web_1_ba4690531efe |   File "/srv/sites/mysite/manage.py", line 10, in <module>
web_1_ba4690531efe |     execute_from_command_line(sys.argv)
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
web_1_ba4690531efe |     utility.execute()
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 338, in execute
web_1_ba4690531efe |     django.setup()
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/django/__init__.py", line 27, in setup
web_1_ba4690531efe |     apps.populate(settings.INSTALLED_APPS)
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/django/apps/registry.py", line 108, in populate
web_1_ba4690531efe |     app_config.import_models()
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/django/apps/config.py", line 202, in import_models
web_1_ba4690531efe |     self.models_module = import_module(models_module_name)
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/importlib/__init__.py", line 126, in import_module
web_1_ba4690531efe |     return _bootstrap._gcd_import(name[level:], package, level)
web_1_ba4690531efe |   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
web_1_ba4690531efe |   File "<frozen importlib._bootstrap>", line 971, in _find_and_load
web_1_ba4690531efe |   File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
web_1_ba4690531efe |   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
web_1_ba4690531efe |   File "<frozen importlib._bootstrap_external>", line 678, in exec_module
web_1_ba4690531efe |   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
web_1_ba4690531efe |   File "/srv/sites/mysite/utils/models.py", line 5, in <module>
web_1_ba4690531efe |     from utils.common_models import AbstractDetailedPerson, AbstractTimeStamped
web_1_ba4690531efe |   File "/srv/sites/mysite/utils/common_models.py", line 5, in <module>
web_1_ba4690531efe |     from utils.functions import national_id_validator
web_1_ba4690531efe |   File "/srv/sites/mysite/utils/functions.py", line 16, in <module>
web_1_ba4690531efe |     from shapely.geometry import Polygon, Point
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/shapely/geometry/__init__.py", line 4, in <module>
web_1_ba4690531efe |     from .base import CAP_STYLE, JOIN_STYLE
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/shapely/geometry/base.py", line 17, in <module>
web_1_ba4690531efe |     from shapely.coords import CoordinateSequence
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/shapely/coords.py", line 8, in <module>
web_1_ba4690531efe |     from shapely.geos import lgeos
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/shapely/geos.py", line 76, in <module>
web_1_ba4690531efe |     free = load_dll('c').free
web_1_ba4690531efe |   File "/usr/local/lib/python3.6/site-packages/shapely/geos.py", line 56, in load_dll
web_1_ba4690531efe |     libname, fallbacks or []))
web_1_ba4690531efe | OSError: Could not find lib c or load any of its variants [].

现在我猜测要么我已经删除了一些依赖项，要么我需要安装一些其他库。做了一些谷歌搜索，显然我需要安装sudo apt-get install libgeos-c1，但我找不到alpine/apk等效的

Answer 1

我遇到了同样的问题（尽管不使用 Django 和 PostGres 数据库）。

最后我用阿米尔的解决方案解决了这个问题。我根据https://github.com/property/docker-postgis/blob/master/Dockerfile.alpine.template添加了 dl-cdn.alpinelinux.org 中的存储库。至关重要的部分是在实施 geos-dev 和 geos 后运行 geos-config。之后我安装了 python 模块，包括 pandas。如前所述，在清理部分 .build-deps 被跳过。

这是我的 Dockerfile 中实现这一目的的部分：

...
运行 apk --update 添加构建基础 libxslt-dev

运行 apk add --virtual .build-deps \
        --存储库 http://dl-cdn.alpinelinux.org/alpine/edge/testing \
        --存储库 http://dl-cdn.alpinelinux.org/alpine/edge/main \
        gcc libc-dev geos-dev geos && \
    runDeps =“$（scanelf --needed --nobanner --recursive / usr / local \
    | awk '{ gsub(/,/, "\nso:", $2); 打印“所以：”$2}'\
    | xargs -r apk 信息 --已安装 \
    | 排序-u)" && \
    apk 添加 --virtual .rundeps $runDeps

运行 geos-config --cflags

运行 pip install --disable-pip-version-check -r requests.txt

运行 apk del 构建基础 python3-dev && \
    rm -rf /var/cache/apk/*
...

顺便说一下，我还尝试了https://github.com/calendar42/docker-python-geos/blob/master/Dockerfile上提供的解决方案。但这对我来说没有成功。