如何在 docker 上运行我的 python 脚本?

问题描述

我正在尝试在 docker 上运行我的 python 脚本.我尝试了不同的方法来做到这一点，但无法在 docker 上运行它.我的python脚本如下:

I am trying to run my python script on docker. I tried different ways to do it but not able to run it on docker. My python script is given below:

import os

print ('hello') 

我已经在我的 Mac 上安装了 docker.但是我想知道如何制作图像然后将其推送到 docker 之后我想在 docker 本身上拉并运行我的脚本.

I have already installed docker on my mac. But i want to know how i can make images and then push it to docker after that i wanna pull and run my script on docker itself.

推荐答案

好了，先为你的docker镜像创建一个具体的项目目录.例如:

Alright, first create a specific project directory for your docker image. For example:

mkdir /home/pi/Desktop/teasr/capturing

在那里复制你的 dockerfile 和脚本并将当前上下文更改为该目录.

Copy your dockerfile and script in there and change the current context to this directory.

cp /home/pi/Desktop/teasr/capturing.py /home/pi/Desktop/teasr/dockerfile /home/pi/Desktop/teasr/capturing/

cd /home/pi/Desktop/teasr/capturing

这是为了最佳实践，因为 docker 引擎在构建时所做的第一件事就是读取整个当前上下文.

This is for best practice, as the first thing the docker-engine does on build, is read the whole current context.

接下来我们将查看您的 dockerfile.它现在应该是这样的:

Next we'll take a look at your dockerfile. It should look something like this now:

FROM python:latest

WORKDIR /usr/local/bin

COPY capturing.py .

CMD ["capturing.py", "-OPTIONAL_FLAG"]

接下来你需要做的是用一个聪明的名字来构建它.通常不鼓励使用点.

The next thing you need to do is build it with a smart name. Using dots is generally discouraged.

docker build -t pulkit/capturing:1.0 .

接下来就是像以前一样运行映像.

Next thing is to just run the image like you've done.

docker run -ti --name capturing pulkit/capturing:1.0

脚本现在在容器内执行，完成后可能会退出.

The script now get executed inside the container and will probably exit upon completion.

编辑后发现导致以下错误的问题:

Edit after finding the problem that created the following error:

standard_init_linux.go:195: exec 用户进程导致exec 格式错误"

树莓派下面有一个不同的架构(ARM 而不是 x86_64)，这可能是问题所在，但不是.如果这是问题所在，将父图像切换到 FROM armhf/python 就足够了.

There's a different architecture beneath raspberry pi's (ARM instead of x86_64), which COULD'VE BEEN the problem, but wasn't. If that would've been the problem, a switch of the parent image to FROM armhf/python would've been enough.

来源

但是！错误不断发生.

所以这个问题的解决方案是在 python 脚本之上简单地缺少 Sha-Bang.脚本中的第一行需要是 #!/usr/bin/env python 应该可以解决问题.

So the solution to this problem is a simple missing Sha-Bang on top of the python script. The first line in the script needs to be #!/usr/bin/env python and that should solve the problem.

来源

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