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06.Dockerfile.md

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title
Dockerfile

Dockerfile 是由命令和参数构成的脚本,用于生成镜像.

命令

  • FROM

    # 加载 alpine tag 版本的 python Image
# alpine 版本下可以使用 apk 包管理工具
# As 作为别名供其他命令使用
python:alpine AS base

  • WORKDIR

    # 定位到 容器应用根目录 /app 下
/app

  • COPY

    # 复制当前目录下 文件 黏贴到容器的根目录下
COPY ./requirements.txt .
# 复制当前目录下 所有文件 黏贴到容器的根目录下，最好移动到底部
COPY . .
# 放到项目里的跟目录下 -> 更改下载源
COPY ./pip.conf /etc/pip.conf

  • ADD

    # ADD [source directory] [destination directory]
ADD /app /home/androllen

  • RUN

    # 可指定国内源下载依赖 -i https://pypi.tuna.tsinghua.edu.cn/simple --no-cache-dir
# RUN pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --no-cache-dir -r requirements.txt
RUN pip install -r requirements.txt
# 编译 /app下的文件
RUN make /app
# 创建/usr/local/tomcat目录
RUN mkdir /usr/local/tomcat
#安装wget命令
RUN apk add wget
# wget tomcat.tar.gz 到 /usr/local/tomcat 目录
RUN wget http://mirrors.hust.edu.cn/apache/tomcat/tomcat-7/v7.0.104/bin/apache-tomcat-7.0.104.tar.gz

  • CMD

    If you list more than one CMD then only the last CMD will take effect

    • CMD ["executable","param1","param2"] (exec form, this is the preferred form)
    • CMD ["param1","param2"] (as default parameters to ENTRYPOINT)
    • CMD command param1 param2 (shell form)
    #  $echo $HOME
CMD ["echo", "$HOME"]
# $sh -c "echo $HOME"
CMD [ "sh", "-c", "echo $HOME" ]

配置国内源

COPY ./pip.conf /etc/pip.conf

RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories

# install psycopg2 dependencies
# RUN apk update && apk add postgresql-dev gcc python3-dev musl-dev
RUN apk update
RUN apk add postgresql-dev gcc python3-dev musl-dev

链接

Best practices for writing Dockerfiles
Dockerfile for python tag