如何摆脱密码学构建错误？

Question

我正在尝试构建一个dockerfile，但问题是当它尝试构建特定的密码学不是建筑。

我的Dockerfile

FROM python:3.7-alpine

ENV PYTHONUNBUFFERED 1

RUN apk update \
  # psycopg2 dependencies
  && apk add --virtual build-deps gcc python3-dev musl-dev\
  && apk add postgresql-dev \
  && apk add build-base \
  # Pillow dependencies
  && apk add jpeg-dev zlib-dev freetype-dev lcms2-dev openjpeg-dev tiff-dev tk-dev tcl-dev \
  # CFFI dependencies
  && apk add libffi-dev py-cffi \
  # Translations dependencies
  && apk add gettext \
  # https://docs.djangoproject.com/en/dev/ref/django-admin/#dbshell
  && apk add postgresql-client \
  # cairo
  && apk add cairo cairo-dev pango-dev gdk-pixbuf-dev poppler-utils

# fonts for weasyprint
RUN mkdir ~/.fonts
COPY ./fonts/* /root/.fonts/

# secret key (should be in docker-secrets, or we need to run minikube locally
RUN mkdir /etc/secrets
COPY secret.readme proxy_rsa_key* /etc/secrets/

# Requirements are installed here to ensure they will be cached.
COPY ./requirements /requirements
RUN pip install -r /requirements/local.txt

COPY ./compose/local/django/entrypoint /entrypoint
RUN sed -i 's/\r//' /entrypoint
RUN chmod +x /entrypoint

COPY ./compose/local/django/start /start
RUN sed -i 's/\r//' /start
RUN chmod +x /start

COPY ./compose/local/django/celery/worker/start /start-celeryworker
RUN sed -i 's/\r//' /start-celeryworker
RUN chmod +x /start-celeryworker

COPY ./compose/local/django/celery/beat/start /start-celerybeat
RUN sed -i 's/\r//' /start-celerybeat
RUN chmod +x /start-celerybeat

COPY ./compose/local/django/celery/flower/start /start-flower
RUN sed -i 's/\r//' /start-flower
RUN chmod +x /start-flower

WORKDIR /app

ENTRYPOINT ["/entrypoint"]

当我尝试构建dockerfile时，它显示：

Building wheel for cryptography (PEP 517): finished with status 'error'
  ERROR: Command errored out with exit status 1:
  
  error: Can not find Rust compiler
  ----------------------------------------
  ERROR: Failed building wheel for cryptography

我试着去解决，但是我做不到。我是一个新手，在docker.Please帮助下如何摆脱这个问题。

Answer 1

由于错误是...

error: Can not find Rust compiler

...the的解决方案是安装rust编译器。您还需要cargo，Rust包管理器，它看起来像您的

Dockerfile是不存在的openssl-dev。

以下是为我成功构建的代码：

FROM python:3.7-alpine

ENV PYTHONUNBUFFERED 1

RUN apk add --update \
  build-base \
  cairo \
  cairo-dev \
  cargo \
  freetype-dev \
  gcc \
  gdk-pixbuf-dev \
  gettext \
  jpeg-dev \
  lcms2-dev \
  libffi-dev \
  musl-dev \
  openjpeg-dev \
  openssl-dev \
  pango-dev \
  poppler-utils \
  postgresql-client \
  postgresql-dev \
  py-cffi \
  python3-dev \
  rust \
  tcl-dev \
  tiff-dev \
  tk-dev \
  zlib-dev

RUN pip install cryptography

请注意，上面的apk add ...命令行与您已有的命令行基本相同；我只是简化了多个apk add ...语句放入一个apk add执行。

Answer 2

您可以通过在apk add命令前添加以下行来跳过rust安装和其他相关依赖：

ENV CRYPTOGRAPHY_DONT_BUILD_RUST=1

Answer 3

有些人可能会来这里(像我一样)寻找Python的修复程序，而不一定是阿尔卑斯山。

有几个选项可用，在github问题。(仅选择其中之一)

1. 你可以安装rust，就像另一个答案提到的那样
2. 你可以降级你的cryptography版本至3.4.x

3. 您可以升级到pip版本19.1.1或更高版本，该版本会安装预编译包