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Docker Toolbox 错误“无法打开文件”

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Docker Toolbox 错误“无法打开文件”

我一直在努力使用 Docker Toolbox 在 Windows 10 Home 上启动并运行 Docker 映像。这是我在 Kitematic 中看到的错误：

python: can't open file 'src/__main__.py': [Errno 2]   
No such file or directory

这个失败的 Python 命令是“notes”Docker 容器的入口点。

Docker/up.sh 执行完毕后，没有任何错误。

Successfully built f59c275721cf
Successfully tagged docker_mysql:latest
Creating mysql ... done
Creating notes ... done

此外，这是一个小组项目，其中 Mac 上的其他用户无法复制此错误。将 Dockerfile 更新为以下内容并运行后：

Successfully built 42a95cd419f2
Successfully tagged docker_mysql:latest
Creating mysql ... done
Creating notes ... done

User@DESKTOP-EBUI9GE MINGW64 /c/users/user/Desktop/6440/Procedure-Notes-Application (master)
$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                     NAMES
68f60fdba6f5        docker_mysql        "docker-entrypoint.s…"   15 seconds ago      Up 9 seconds        0.0.0.0:23306->3306/tcp   mysql

User@DESKTOP-EBUI9GE MINGW64 /c/users/user/Desktop/6440/Procedure-Notes-Application (master)
$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS                     NAMES
e7fbd5b73189        docker_notes        "python /app/src/__m…"   23 seconds ago      Exited (2) 17 seconds ago                             notes
68f60fdba6f5        docker_mysql        "docker-entrypoint.s…"   23 seconds ago      Up 17 seconds               0.0.0.0:23306->3306/tcp   mysql

更新的 Dockerfile：

### Use an official Python runtime as a parent image 
FROM python:2.7-slim

### set working directory to the code location
WORKDIR /app

### copy the code base over (redone by the compose file)
COPY . .

### Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

### Make port available to the world outside this container
EXPOSE 5000

### start the application
CMD ["python", "/app/src/__main__.py"]

我现在收到另一个错误：

 * Serving Flask app "__main__" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 * Restarting with stat
Traceback (most recent call last):
  File "/app/src/__main__.py", line 57, in <module>
    app.run(debug=True, host='0.0.0.0')
  File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 943, in run
    run_simple(host, port, self, **options)
  File "/usr/local/lib/python2.7/site-packages/werkzeug/serving.py", line 988, in run_simple
    run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
  File "/usr/local/lib/python2.7/site-packages/werkzeug/_reloader.py", line 332, in run_with_reloader
    sys.exit(reloader.restart_with_reloader())
  File "/usr/local/lib/python2.7/site-packages/werkzeug/_reloader.py", line 176, in restart_with_reloader
    exit_code = subprocess.call(args, env=new_environ, close_fds=False)
  File "/usr/local/lib/python2.7/subprocess.py", line 172, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/local/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/local/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 8] Exec format error

答案1

我开始这个过程时说的第一句话是：

您不需要 mkdir，因为 WORKDIR 会创建它。最好使用绝对引用，例如WORKDIR /app和 CMD ["python", "/app/src/__main__.py"]。

Python脚本现在启动和停止时出现错误：

  File "/usr/local/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception

这通常是 Python 脚本中的错误。帖子中描述了一种可能性 python subprocess.call() 未按预期工作：

默认情况下subprocess.call不使用 shell 来运行我们的命令，因此您无法运行类似的 shell 命令cd。

要使用 shell 运行命令，请使用shell=True作为参数。在这种情况下，建议将命令作为单个字符串而不是列表传递。由于它由 shell 运行，因此您也可以~/在路径中使用：

subprocess.call("(cd ~/catkin_ws/src && catkin_make)", shell=True)

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