CentOS8报错Error: Failed to download metadata for repo ‘AppStream‘

原创已于 2022-03-05 01:07:43 修改 · 945 阅读

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#linux #运维 #centos #服务器

于 2022-03-04 22:45:00 首次发布

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这篇博客讲述了在 CentOS 8 中遇到的错误，即配置文件中镜像列表重复，导致无法下载 AppStream 的元数据。文章介绍了问题原因，即CentOS 8 已经停止更新，提供了修改yum.repos.d文件的方法，并展示了修复后的更新验证过程。

故障描述
CentOS8更新时候报如下错误

[root@vps ~]# dnf upgrade
Repository cr is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository extras-source is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
CentOS-8 - AppStream                                                                                                                   119  B/s |  38  B     00:00    
Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
[root@vps ~]# dnf update
Repository cr is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository extras-source is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
CentOS-8 - AppStream                                                                                                                   129  B/s |  38  B     00:00    
Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
[root@vps ~]#

原因分析
通过查询资料发现CentOS8已于2021年12月31日停止更新
链接：https://www.centos.org/centos-linux-eol/.
解决方法

[root@vps ~]# cd /etc/yum.repos.d/
[root@vps yum.repos.d]# sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
[root@vps yum.repos.d]# sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

Update验证

[root@vps yum.repos.d]# dnf update
Repository cr is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository extras-source is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
CentOS-8 - AppStream                                                                                                                   508 kB/s | 8.4 MB     00:17    
CentOS-8 - Base                                                                                                                        495 kB/s | 4.6 MB     00:09    
CentOS-8 - Extras                                                                                                                      5.8 kB/s |  10 kB     00:01    
CentOS Linux 8 - AppStream                                                                                                             423 kB/s | 8.4 MB     00:20    
CentOS Linux 8 - BaseOS                                                                                                                868 kB/s | 4.6 MB     00:05    
Dependencies resolved.
Nothing to do.
Complete!
[root@vps yum.repos.d]#