docker 在 alpine linux 中构建 python django 应用程序时出错

Question

1. 文件

FROM python:3.6.5-alpine3.7
WORKDIR /app
ADD . /app
RUN pip install --no-cache-dir -r requirements.txt
EXPOSE 10021
CMD ["python", "manage.py", "runserver", "0.0.0.0:10021"]

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2. 要求

   • openpyxl==2.4.11
   • 请求==2.18.4
   • Django==2.0.2
   • mysql客户端==1.3.12

---

3. 构建错误

Collecting mysqlclient==1.3.12 (from -r requirements.txt (line 4))
  Downloading https://mirrors.aliyun.com/pypi/packages/6f/86/bad31f1c1bb0cc99e88ca2adb7cb5c71f7a6540c1bb001480513de76a931/mysqlclient-1.3.12.tar.gz (89kB)
    Complete output from command python setup.py egg_info:
    /bin/sh: mysql_config: not found
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-er3m_9t6/mysqlclient/setup.py", line 17, in <module>
        metadata, options = get_config()
      File "/tmp/pip-install-er3m_9t6/mysqlclient/setup_posix.py", line 44, in get_config
        libs = mysql_config("libs_r")
      File "/tmp/pip-install-er3m_9t6/mysqlclient/setup_posix.py", line 26, in mysql_config
        raise EnvironmentError("%s not found" % (mysql_config.path,))
    OSError: mysql_config not found

感谢@danblack对于mariadb-connector-c-dev这帮助我解决这个OSError: mysql_config not found错误。

---

4. 新建 Dockerfile

FROM python:3.6.5-alpine3.7
WORKDIR /app
ADD . /app
RUN apk add --no-cache build-base && apk add --no-cache mariadb-connector-c-dev && pip install --no-cache-dir -r requirements.txt && apk del build-base
EXPOSE 10021
CMD ["python", "manage.py", "runserver", "0.0.0.0:10021"]

---

5. 新问题

但是出现了一个新问题，Dockerdocker run ...运行时什么也没打印，没有日志，没有错误。它应该打印如下日志

Performing system checks... 
System check identified no issues (0 silenced). 
September 04, 2018 - 15:56:26 
Django version 2.0.2, using settings 'xxx.settings' 
Starting development server at http://0.0.0.0:10021/ 
Quit the server with CTRL-BREAK.

有人可以给我看一个完整的 Dockerfile 吗？请帮忙！非常感谢。

Answer 1

你需要安装mariadb-connector-c-dev alpine 包，它提供mysql_config了 python 包用来识别它需要链接的库。

Answer 2

根据@danblack，主要需要安装mariadb-connector-c-dev包。但只有这个包才会出现编译错误。因此，您还需要将 gcc 和 musl-dev 包添加到 Dockerfile 中。这将使 Django 和 MySQL 在 alpine 镜像中工作。

FROM python:3.8-alpine

RUN apk add gcc musl-dev mariadb-connector-c-dev