Python文件写入在Docker内部不起作用 [英] Python file writing is not working inside docker

问题描述

我正在尝试将其中包含文本文件和CSV文件的文件写入其中的python脚本码头化。

作为参考，我的代码是

  FROM python：3 
 
 
 
添加./HMS.py / 
添加./constants.py / 
添加./Docker.py / 
添加./SNT.py / 
添加./Utility.py / 
 
 
运行pip install --trusted-host pypi.org --trusted-host文件。 pythonhosted.org docker 
 RUN pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org grepfunc 
 RUN pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org请求
 
 
 CMD [ python， ./ HMS.py； ] 
  

但是，当我在外部运行python脚本时，便能够生成文件。我可以知道为什么它没有在工作目录中生成。

UPDATE

  def write_log（self ，文件名，消息，类型='信息'）：
，以open（文件名，'a'）作为日志：
 log.write（'\n'+消息）
 
 def write_csv（self，filepath，data）：
 with open（filepath，'a'，newline =''）as file：
 writer = csv.writer（file）
 writer .writerow（data）
  

常量文件包含路径

  LOG_FILE ='。/ snt_alarm_log.txt'
 COMPONENT_NAME ='SNT警报'
 DB_FILE ='。/ snt.csv'
  

解决方案

容器本质上是短暂的。如果要保留容器内部生成的文件，则需要将主机文件系统挂载到容器的文件系统。挂载卷的方法有很多，但是常见的方法是绑定挂载

  docker run -v / path / to /主机：/ project sntalarmdocker_snt 
  

任何保存到 / project 也将显示在 / path / to / host 中。

I'm a trying to dockerize a python script in which file writing of a text file and CSV file is there. but it is not working, the file is not getting generated.

For reference my code is

FROM python:3



ADD ./HMS.py /
ADD ./constants.py /
ADD ./Docker.py /
ADD ./SNT.py /
ADD ./Utility.py /


RUN pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org docker
RUN pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org grepfunc
RUN pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org requests


CMD [ "python", "./HMS.py" ]

However, when I run the python script outside am able to generate the files. May I know why it is not getting generated inside the work directory.

UPDATE

    def write_log(self, filename, message, type='info'):
        with open(filename, 'a') as log:
            log.write('\n' + message)

    def write_csv(self, filepath, data):
        with open(filepath, 'a', newline='') as file:
            writer = csv.writer(file)
            writer.writerow(data)

constant file contain the path

LOG_FILE='./snt_alarm_log.txt'
COMPONENT_NAME='SNT Alarm'
DB_FILE='./snt.csv'

解决方案

Containers are ephemeral by nature. If you want to retain files generated inside a container you need to mount your host file system to the file system of the container. There are many ways to mount a volume, but a common way is a bind mount

docker run -v /path/to/host:/project sntalarmdocker_snt

Whatever gets saved to /project will be visible in /path/to/host even after the container is killed

这篇关于Python文件写入在Docker内部不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！