dokcer-python环境基础镜像制作

定制自己的python环境基础镜像，便于后续python项目快速打成镜像
参考 https://blog.csdn.net/imiyuer/article/details/106003736

环境

已部署好docker镜像仓库(registry)
centos7主机上已安装 python3、dokcer

制作原始镜像

docker build -f ./Dockerfile -t "centos7-py:v1" .

Dockerfile内容如下（参考https://blog.csdn.net/imiyuer/article/details/106003736）：

    # 完整功能python3 imiyuer/python:3.6.4-centos
    FROM centos:7.5.1804
    MAINTAINER imiyuer <imiyuer@qq.com>

    ENV PATH $PATH:/usr/local/python3/bin/
    ENV PYTHONIOENCODING utf-8

    RUN set -ex \
        # 替换yum源
        && mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup \ 
        && curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo \
&& sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/        CentOS-Base.repo \   
        # 安装python依赖库
        && yum makecache \
&& yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel     readline-devel     tk-devel gcc make wget \
        && yum clean all \
        && rm -rf /var/cache/yum \
        # 下载安装python3
        && wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgz \
        && mkdir -p /usr/local/python3 \
        && tar -zxvf Python-3.6.4.tgz \
        && cd Python-3.6.4 \
        && ./configure --prefix=/usr/local/python3 \
        && make && make install && make clean \
        # 修改pip默认镜像源
        && mkdir -p ~/.pip \
        && echo '[global]' > ~/.pip/pip.conf \
        && echo 'index-url = https://pypi.tuna.tsinghua.edu.cn/simple' >> ~/.pip/pip.conf \
        && echo 'trusted-host = pypi.tuna.tsinghua.edu.cn' >> ~/.pip/pip.conf \
        && echo 'timeout = 120' >> ~/.pip/pip.conf \
        # 更新pip
        && pip3 install --upgrade pip \
        # 安装wheel
        && pip3 install wheel \
        # 删除安装包
        && cd .. \
        && rm -rf /Python* \
        && find / -name "*.py[co]" -exec rm '{}' ';' \
        # 设置系统时区
        && rm -rf /etc/localtime \
        && ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

可能网络不好时会制作失败，重试几次就好

修改标签并上传到内网仓库

docker tag centos7-python3:v1 192.168.2.132:5000/centos7-python3:v1
docker push 仓库(registry)
    #192.168.2.132:5000为内网仓库(registry)地址

在其他主机上使用python环境基础镜像

拉取基础镜像
docker pull 192.168.2.132:5000/centos7-python3:v1

创建python代码test.py(以最简单webpy为例)
    import web

    urls = (
        '/(.*)', 'hello'
    )
    app = web.application(urls, globals())

    class hello:
        def GET(self, name):
            if not name:
                name = 'World'
            return 'Hello, ' + name + '!'

    if __name__ == "__main__":
        app.run()

创建Dockerfile：
    FROM 192.168.2.132:5000/centos7-python:v1
    COPY ./test.py ./
    RUN  pip install web.py
    EXPOSE 8080
    CMD python3 test.py

制作镜像    
docker build -f ./Dockerfile -t "centos7-python-test:v1" .

创建运行容器
docker run -d -p 8080:8080 --name webpy centos7-python-test:v1