centos8 yum安装提示All mirrors were tried-CSDN博客

一、问题描述

        当使用yum进行安装的时候提示如下错误。

Status code: 404 for https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/repodata/repomd.xml (IP: 39.96.118.192)
Error: Failed to download metadata for repo 'baseos’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

二、解决方案

        依次修改修改以下三个文件

        1、/etc/yum.repos.d/CentOS-Base.repo

# CentOS-Base.repo
[BaseOS]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

        2、/etc/yum.repos.d/CentOS-AppStream.repo

# CentOS-AppStream.repo
[AppStream]
name=CentOS-$releasever - AppStream
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

        3、/etc/yum.repos.d/CentOS-Extras.repo

# CentOS-Extras.repo
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/extras/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

        4、修改之后清缓存，制作元数据缓存

# 清除所有缓存文件
yum clean all
# 制作元数据缓存
yum makecache

三、其它问题

        如果进行上述处理还是报错，还是找不到相关文件，就是镜像库的位置不对，需要确认。

Status code: 404 for https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/repodata/repomd.xml (IP: 39.96.118.192)
Error: Failed to download metadata for repo 'baseos’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried**

        查看阿里云开源镜像站资源目录阿里云开源镜像站资源目录Index of /centos/ | 阿里云开源镜像站利用云服务上的优势，提供快速、稳定的镜像分发服务和免费的CDN加速服务。阿里云开源镜像站覆盖了主流操作系统 CentOS、Ubuntu，Fedora，Gentoo，Debian，FreeBSD、优麒麟、Rocky Linux、OpenAnolis等，常见的编程语言和构建依赖包和工具，例如npm、Maven、PyPI、Composer、Jenkins、KiCad、Blender等，以及云原生等领域的主流软件Kubernetes、Docker、MangoDB、MariaDB等，已经累计收录了几百个开源软件的镜像。

https://mirrors.aliyun.com/centos/

        根据镜像站的目录，找到缺失的文件，比如把代表8的这个"releasever" 改成releasever-stream。