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Docker Install Python

安装 Python 镜像

方法一、docker pull python:3.5

查找 Docker Hub 上的 Python 镜像:

可以通过 Sort by 查看其他版本的 python,默认是最新版本 python:lastest

此外,我们还可以用 docker search python 命令来查看可用版本:

w3codebox@w3codebox:~/python$ docker search python
NAME                           DESCRIPTION                        STARS     OFFICIAL   AUTOMATED
python  Python is an interpreted,...       982       [OK]       
kaggle/python  Docker image for Python...         33                   [OK]
azukiapp/python  Docker image to run Python...     3                    [OK]
vimagick/python  mini python                                  2          [OK]
tsuru/python  Image for the Python...           2                    [OK]
pandada8/alpine-python  An alpine based python image                 1          [OK]
1science/python  Python Docker images based on...  1                    [OK]
lucidfrontier45/python-uwsgi Python with uWSGI                  1                    [OK]
orbweb/python  Python image                       1                    [OK]
pathwar/python  Python template for Pathwar levels 1                    [OK]
rounds/10m-python  Python, setuptools and pip.  0  [OK]
ruimashita/python  ubuntu 14.04 python  0  [OK]
tnanba/python  Python on CentOS-7 image.  0  [OK]

Here we pull the official image, with the tag of3.5

w3codebox@w3codebox:~/python docker pull python:3.5

After the download is complete, we can find the REPOSITORY with python and a tag in the local image list. 3.5 of the mirror.

w3codebox@w3codebox:~/python$ docker images python:3.5 
REPOSITORY         TAG                 IMAGE ID           CREATED             SIZE
python              3.5              045767ddf24a        9 days ago          684.1 MB

Method two, build the image through Dockerfile

Create Dockerfile</p>

First, create the directory python to store the related items later.

w3codebox@w3codebox:~$ mkdir -p ~/python ~/python/myapp

The myapp directory will be mapped to the application directory configured in the python container.

Enter the created python directory, create a Dockerfile.

FROM buildpack-deps:jessie
# remove several traces of debian python
RUN apt-get purge -y python.*
# http://bugs.python.org/issue19846
# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
ENV LANG C.UTF-8
# gpg: key F73C700D: public key "Larry Hastings <[email protected]>" imported
ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
ENV PYTHON_VERSION 3.5.1
# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
ENV PYTHON_PIP_VERSION 8.1.2
RUN set -ex \\
         -fSL \//www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" -o python.tar.xz \\
         -fSL \//www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" -o python.tar.xz.asc \\
        && export GNUPGHOME="$(mktemp -d) " \\
        && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys \
        && gpg --batch --verify python.tar.xz.asc python.tar.xz \
        && rm -r \
        && mkdir -p /usr/src/python \
        && tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
        && rm python.tar.xz \
        \
        && cd /usr/src/python \
        && ./configure --enable-shared --enable-unicode=ucs4 \
        && make -j$(nproc) \
        && make install \
        && ldconfig \
        && pip3 install --no-cache-dir --upgrade --ignore-installed pip==$PYTHON_PIP_VERSION \
        && find /usr/local -depth \
                \( \
                    \( -type d -a -name test -o -name tests \) \
                    -o \
                    \( -type f -a -name '*.pyc' -o -name '*.pyo \) \
                \) -exec rm -rf '{}' + \
        && rm -rf /usr/src/python ~/.cache
# make some useful symlinks that are expected to exist
RUN cd /usr/local/bin \
        && ln -s easy_install-3.5 easy_install \
        && ln -s idle3 idle \
        && ln -s pydoc3 pydoc \
        && ln -s python3 python \
        && ln -s python3-config python-config
CMD ["python3"]

Create an image through Dockerfile, replace it with your own name:

w3codebox@w3codebox:~/python$ docker build -t python:3.5 .

After the creation is complete, we can find the newly created image in the local image list:

w3codebox@w3codebox:~/python$ docker images python:3.5 
REPOSITORY         TAG                 IMAGE ID           CREATED             SIZE
python              3.5              045767ddf24a        9 days ago          684.1 MB

Use the python image

In ~/python/Create a helloworld.py file in the myapp directory, as follows:

#!/usr/bin/python
print("Hello, World!");

Run Container

w3codebox@w3codebox:~/python$ docker run  -v $PWD/myapp:/usr/src/myapp  -w /usr/src/myapp python:3.5 python helloworld.py

Command Description:

-v $PWD/myapp:/usr/src/myapp: Mount the current directory of the host to the container's /usr/src/myapp.

-w /usr/src/myapp: Specify the container's /usr/src/The myapp directory is the working directory.

python helloworld.py: Use the container's python command to execute the helloworld.py file in the current working directory.

Output Result:

Hello, World!