docker打包一个包含python3的centos8的新镜像过程

docker search centos
docker pull centos # 默认latest

# 这边用的python3.11，需要提前下好
wget https://www.python.org/ftp/python/3.11.2/Python-3.11.2.tgz

# 1.下载阿里源
wget https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

# 设置基础镜像，我是把centos:latest重新打标签给打成了centos:8
# docker tag centos:latest centos:8
FROM centos:8
# 执行用户设置为root
USER root
# 拷贝阿里源文件至镜像内部
COPY ./Centos-vault-8.5.2111.repo /home
# 拷贝python3.11包至镜像内部
COPY ./Python-3.11.2.tgz /home
# 拷贝python所需要安装的依赖包文件
COPY ./requirements.txt /home
# 拷贝python文件至镜像内部
COPY ./app.py /home
# 将运行目录调整为/home
WORKDIR /home
# 我这里是直接删除镜像内部原有的源3
RUN rm -rf /etc/yum.repos.d/*
# 将阿里源拷贝至镜像源内部
RUN cp -r ./Centos-vault-8.5.2111.repo /etc/yum.repos.d/CentOS-Base.repo
# 更新一下YUM cache
RUN yum clean all
RUN yum makecache
# 安装一下python所需依赖包
RUN yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel libffi-devel xz-devel
RUN yum install -y gcc
RUN yum install -y make
#解压python，并安装python
RUN tar -zxvf Python-3.11.2.tgz -C /usr/local/
WORKDIR /usr/local/Python-3.11.2
RUN ./configure --prefix=/usr/local/python3
RUN make && make install

# 将python添加到系统路径中
ENV PATH="/usr/local/python3/bin:${PATH}"
# 在安装python的时候更换了工作目录，现在更换回来
WORKDIR /home
RUN pip3 install -r requirements.txt
CMD ["python3", "app.py"]

#!/bin/bash

function build_image() {
  docker_name="*****/******/${image_name}:${MODE}_${TIMENOW}"
  docker build -t ${docker_name} .
  docker push ${docker_name} # 如果自己本地测试，可以删除这一行
  #check_ret $? $FUNCNAME
}

function check_ret() {
  if [ $1 != 0 ]; then
    echo "$2 Failure, Exit!"
    exit $1
  fi
}
image_name='python'
MODE="date"
TIMENOW=$(date +%y.%m.%d.%H%M)

echo "build workflow start .."
build_image
echo "build workflow end .."