如何从Docker容器内的cron文件运行脚本？ [英] How to run a script from a cron file inside a docker container?

问题描述

我是初级开发人员，我正在为当前的工作而苦苦挣扎。我需要在docker容器中使用cron运行脚本，但我有点迷茫。我的脚本是check.py，我的DOCKERFILE是：

I am junior developer and I am struggling with my current task at work. I need to run a script with cron inside a docker container and I am a little lost. My script is check.py, my DOCKERFILE is :

FROM ubuntu:latest

# Set the working directory to /app
WORKDIR /monitor-updates

# Copy the current directory contents into the container at /app
ADD . /monitor-updates

RUN \
  apt-get update && \
  apt-get install -y python python-dev python-pip python-virtualenv libmysqlclient-dev curl&& \
  rm -rf /var/lib/apt/lists/*

RUN pip install --upgrade pip
RUN pip install -r requirements.txt


ADD my-crontab /
ADD check.py /
RUN chmod a+x check.py 
RUN chmod a+x my-crontab 

RUN my-crontab
CMD ["cron", "-f"]

，而我的cron文件是my-crontab：

and my cron file is my-crontab:

* * * * * /check.py > /dev/console

推荐答案

我需要在docker容器中使用cron运行脚本，但我有点迷茫。

I need to run a script with cron inside a docker container and I am a little lost.

以下是在容器中通过cron运行脚本的最小示例，您可以轻松地适应您的需求：

Here is minimal example of running a script via cron inside a container that you can easily accommodate to your needs:

FROM ubuntu:16.04
ADD my-script /
RUN apt-get update && \
    apt-get install -y cron && \
    chmod +x /my-script && \
    (crontab -l 2>/dev/null; echo "*/10 * * * * /my-script") | crontab -

要构建并运行此示例，您将：

To build and run this example you would:

• docker build --tag = test。


• docker run -it --rm test


• 然后进行清理 docker rmi test

• docker build --tag=test .
• docker run -it --rm test
• and for cleanup afterwards docker rmi test

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