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我正在尝试在基于 python:alpine 的 Docker 容器中运行 Python 的 Scrapy。它以前可以工作，但现在我想使用 Scrapy 的 Image Pipeline ，这需要我安装 Pillow。
作为一个简化的示例，我尝试了以下 Dockerfile ：
FROM python:alpine
RUN apk --update add libxml2-dev libxslt-dev libffi-dev gcc musl-dev libgcc openssl-dev curl
RUN apk add libjpeg zlib tiff freetype lcms libwebp tcl openjpeg
RUN pip install Pillow
但是，当我尝试构建它时，我收到一个错误，其中包含以下内容：
Traceback (most recent call last):
File "/tmp/pip-build-ft5yzzuv/Pillow/setup.py", line 744, in <module>
zip_safe=not debug_build(), )
File "/usr/local/lib/python3.6/distutils/core.py", line 148, in setup
dist.run_commands()
File "/usr/local/lib/python3.6/distutils/dist.py", line 955, in run_commands
self.run_command(cmd)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/usr/local/lib/python3.6/site-packages/setuptools/command/install.py", line 61, in run
return orig.install.run(self)
File "/usr/local/lib/python3.6/distutils/command/install.py", line 545, in run
self.run_command('build')
File "/usr/local/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/usr/local/lib/python3.6/distutils/command/build.py", line 135, in run
self.run_command(cmd_name)
File "/usr/local/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/usr/local/lib/python3.6/distutils/command/build_ext.py", line 339, in run
self.build_extensions()
File "/tmp/pip-build-ft5yzzuv/Pillow/setup.py", line 545, in build_extensions
raise RequiredDependencyException(f)
__main__.RequiredDependencyException: jpeg
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-ft5yzzuv/Pillow/setup.py", line 756, in <module>
raise RequiredDependencyException(msg)
__main__.RequiredDependencyException:
The headers or library files could not be found for jpeg,
a required dependency when compiling Pillow from source.
Please see the install instructions at:
https://pillow.readthedocs.io/en/latest/installation.html
我查看了 https://pillow.readthedocs.io/en/latest/installation.html 上的要求并试图找到 Alpine 的相应包，虽然我找不到 libimagequant ，所以这可能是“罪魁祸首” ‘。尽管如此，回溯和错误消息似乎是说 jpeg 丢失了，而我已经安装了 openjpeg 。
如何修改 Dockerfile 以便 pip install Pillow 运行？
原文由 Kurt Peek 发布，翻译遵循 CC BY-SA 4.0 许可协议
python
在稍后似乎已被删除的评论中，有人将我指向 https://github.com/python-pillow/Pillow/blob/c05099f45c0d94a2a98c3609a96bdb6cf7446627/depends/alpine_Dockerfile 。基于该 Dockerfile 我修改了自己的如下：
现在它构建成功。