Centos8 配置阿里镜像源

##下周jdk17包

# curl -O  http://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.tar.gz

# tar xvf jdk-17_linux-x64_bin.tar.gz

Dockerfile

FROM docker.m.daocloud.io/centos:8
# 下载并安装 OpenJDK 17 
COPY jdk-17.0.12 /usr/local/jdk

# 设置 JAVA_HOME 环境变量  
ENV JAVA_HOME /usr/local/jdk  
ENV PATH $JAVA_HOME/bin:$PATH  

# 验证安装  
RUN java -version

1、进入yum的repos目录

cd /etc/yum.repos.d/

2、下载CentOS 7的repo文件

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo

3、修改镜像源

vim CentOS-Base.repo
# vim命令模式下执行
:%s/mirrors.cloud.aliyuncs.com/mirrors.aliyun.com/g
:%s/$releasever/$releasever-stream/g

4、修改所有的CentOS文件内容

sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

5、更新镜像源

清除缓存：yum clean all
生成缓存：yum makecache

6、更新yum：

yum update