Dockerfile 不能在 Windows 10 上 运行 manage.py
Dockerfile cannot run manage.py on Windows 10
这是我的 Dockerfile:
# base image
FROM python:3.7.2-alpine
# set working directory
WORKDIR /usr/src/app
# add and install requirements
COPY ./requirements.txt /usr/src/app/requirements.txt
RUN pip install -r requirements.txt
# add app
COPY . /usr/src/app
# run server
CMD ["python", "manage.py", "run"]
这是我的manage.py文件：
from flask.cli import FlaskGroup
from project import app
cli = FlaskGroup(app)
# run and manage the app from the command line
if __name__ == '__main__':
cli()
当我运行"docker-compose up"时，一切都很好，但是这个：
Starting app_users_1 ... done
Attaching to app_users_1
users_1 | * Serving Flask app "project/__init__.py" (lazy loading)
users_1 | * Environment: development
users_1 | * Debug mode: on
users_1 | * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
users_1 | * Restarting with stat
users_1 | Traceback (most recent call last):
users_1 | File "manage.py", line 8, in <module>
users_1 | cli()
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 764, in __call__
users_1 | return self.main(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/flask/cli.py", line 569, in main
users_1 | return super(FlaskGroup, self).main(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 717, in main
users_1 | rv = self.invoke(ctx)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 1137, in invoke
users_1 | return _process_result(sub_ctx.command.invoke(sub_ctx))
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 956, in invoke
users_1 | return ctx.invoke(self.callback, **ctx.params)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 555, in invoke
users_1 | return callback(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/decorators.py", line 64, in new_func
users_1 | return ctx.invoke(f, obj, *args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 555, in invoke
users_1 | return callback(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/flask/cli.py", line 783, in run_command
users_1 | threaded=with_threads, ssl_context=cert)
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/serving.py", line 1007, in run_simple
users_1 | run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/_reloader.py", line 332, in run_with_reloader
users_1 | sys.exit(reloader.restart_with_reloader())
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/_reloader.py", line 176, in restart_with_reloader
users_1 | exit_code = subprocess.call(args, env=new_environ, close_fds=False)
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 323, in call
users_1 | with Popen(*popenargs, **kwargs) as p:
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 775, in __init__
users_1 | restore_signals, start_new_session)
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 1522, in _execute_child
users_1 | raise child_exception_type(errno_num, err_msg, err_filename)
users_1 | OSError: [Errno 8] Exec format error: '/usr/src/app/manage.py'
app_users_1 exited with code 1
看来 Dockerfile 的最后一步 (CMD) 失败了。在我的本地机器上，flask 应用程序可以 运行 没有任何问题。我不知道为什么它在“flask.cli”模块中失败。好像没有带"run"这个参数？
请帮忙！
您面临的问题实际上包含在堆栈跟踪的最后一行中。我将尝试首先阐明错误，然后为您提供解决方案：
错误的含义:
OSError: 发生与您的操作系统相关的错误（即 windows）。Exec format error: '/usr/src/app/manage.py': 具体来说，系统无法执行 manage.py 文件，很可能是因为文件顶部缺少 shebang。
可能的解决方案：
在文件开头添加一个 shebang，可能使用 python 可执行文件的完整路径。
其他相关问题:
OSError: [Errno 8] Exec format error
Why not os.path.join use os.path.sep or os.sep?
这是我的 Dockerfile:
# base image
FROM python:3.7.2-alpine
# set working directory
WORKDIR /usr/src/app
# add and install requirements
COPY ./requirements.txt /usr/src/app/requirements.txt
RUN pip install -r requirements.txt
# add app
COPY . /usr/src/app
# run server
CMD ["python", "manage.py", "run"]
这是我的manage.py文件：
from flask.cli import FlaskGroup
from project import app
cli = FlaskGroup(app)
# run and manage the app from the command line
if __name__ == '__main__':
cli()
当我运行"docker-compose up"时，一切都很好，但是这个：
Starting app_users_1 ... done
Attaching to app_users_1
users_1 | * Serving Flask app "project/__init__.py" (lazy loading)
users_1 | * Environment: development
users_1 | * Debug mode: on
users_1 | * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
users_1 | * Restarting with stat
users_1 | Traceback (most recent call last):
users_1 | File "manage.py", line 8, in <module>
users_1 | cli()
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 764, in __call__
users_1 | return self.main(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/flask/cli.py", line 569, in main
users_1 | return super(FlaskGroup, self).main(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 717, in main
users_1 | rv = self.invoke(ctx)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 1137, in invoke
users_1 | return _process_result(sub_ctx.command.invoke(sub_ctx))
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 956, in invoke
users_1 | return ctx.invoke(self.callback, **ctx.params)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 555, in invoke
users_1 | return callback(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/decorators.py", line 64, in new_func
users_1 | return ctx.invoke(f, obj, *args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/click/core.py", line 555, in invoke
users_1 | return callback(*args, **kwargs)
users_1 | File "/usr/local/lib/python3.7/site-packages/flask/cli.py", line 783, in run_command
users_1 | threaded=with_threads, ssl_context=cert)
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/serving.py", line 1007, in run_simple
users_1 | run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/_reloader.py", line 332, in run_with_reloader
users_1 | sys.exit(reloader.restart_with_reloader())
users_1 | File "/usr/local/lib/python3.7/site-packages/werkzeug/_reloader.py", line 176, in restart_with_reloader
users_1 | exit_code = subprocess.call(args, env=new_environ, close_fds=False)
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 323, in call
users_1 | with Popen(*popenargs, **kwargs) as p:
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 775, in __init__
users_1 | restore_signals, start_new_session)
users_1 | File "/usr/local/lib/python3.7/subprocess.py", line 1522, in _execute_child
users_1 | raise child_exception_type(errno_num, err_msg, err_filename)
users_1 | OSError: [Errno 8] Exec format error: '/usr/src/app/manage.py'
app_users_1 exited with code 1
看来 Dockerfile 的最后一步 (CMD) 失败了。在我的本地机器上，flask 应用程序可以 运行 没有任何问题。我不知道为什么它在“flask.cli”模块中失败。好像没有带"run"这个参数？
请帮忙！
您面临的问题实际上包含在堆栈跟踪的最后一行中。我将尝试首先阐明错误，然后为您提供解决方案：
错误的含义:
OSError: 发生与您的操作系统相关的错误（即 windows）。Exec format error: '/usr/src/app/manage.py': 具体来说，系统无法执行manage.py文件，很可能是因为文件顶部缺少 shebang。
可能的解决方案：
在文件开头添加一个 shebang，可能使用 python 可执行文件的完整路径。
其他相关问题:
OSError: [Errno 8] Exec format error
Why not os.path.join use os.path.sep or os.sep?