我如何在docker容器中只安装python 2.7？

Question

我有节点应用程序，在一个用例中，我使用python-shell从节点调用python脚本。我试图在docker上设置这个应用程序，我的Dockerfile看起来像这样

FROM debian:latest
# replace shell with bash so we can source files
RUN rm /bin/sh && ln -s /bin/bash /bin/sh
# update the repository sources list
# and install dependencies
RUN apt-get update \
&& apt-get install -y curl \
&& apt-get -y autoclean
# nvm environment variables
ENV NVM_DIR /usr/local/nvm
ENV NODE_VERSION 10.15.3
# install nvm
# https://github.com/creationix/nvm#install-script
RUN curl --silent -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.2/install.sh | bash
# install node and npm
RUN source $NVM_DIR/nvm.sh \
&& nvm install $NODE_VERSION \
&& nvm alias default $NODE_VERSION \
&& nvm use default
# add node and npm to path so the commands are available
ENV NODE_PATH $NVM_DIR/v$NODE_VERSION/lib/node_modules
ENV PATH $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH
# confirm installation
RUN node -v
RUN npm -v
RUN apt-get -y install python2.7
COPY package.json .
RUN npm install
COPY . .
CMD ["npm","run","start"]

在我尝试调用从节点调用python脚本的用例时构建并运行此容器后，我收到此错误。

null
events.js:174
      throw er; // Unhandled 'error' event
      ^

Error: spawn /usr/lib/python2.7 EACCES
    at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1

Answer 1

你可以使用python基本图像

FROM PYTHON:2.7

这个基本映像有python预配置，你不需要单独安装python。希望能帮助到你。

这是可用图像的list

如需快速参考，请查看https://blog.realkinetic.com/building-minimal-docker-containers-for-python-applications-37d0272c52f3

Answer 2

您可以使用基本图像“FROM python：2.7”。

FROM python:2.7

WORKDIR /usr/src/app

COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD [ "python", "./your-daemon-or-script.py" ]

(documentation link)please find some examples here