【Centos 7】报错：Could not retrieve mirrorlist

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centos 7 安装chrony时报错：

[root@localhost ~]# yum install chrony
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_6                         4&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误"


 One of the configured repositories failed (未知),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo= ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

原因
CentOS 7 的官方仓库在 2024 年 6 月 30 日之后已经停止维护。

解决方法

1. 备份CentOS-Base.repo 文件

   cd /etc/yum.repos.d
   cp  CentOS-Base.repo   CentOS-Base.repo.backup
   vi CentOS-Base.repo 
   

2. 修改CentOS-Base.repo 文件

   # CentOS-Base.repo
   #
   # The mirror system uses the connecting IP address of the client and the
   # update status of each mirror to pick mirrors that are updated to and
   # geographically close to the client.  You should use this for CentOS updates
   # unless you are manually picking other mirrors.
   #
   # If the mirrorlist= does not work for you, as a fall back you can try the 
   # remarked out baseurl= line instead.
   #
   #
    
   [base]
   name=CentOS-$releasever - Base
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
   #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
   #baseurl=http://vault.centos.org/7.9.2009/x86_64/os/
   baseurl=http://vault.centos.org/7.9.2009/os/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
    
   #released updates 
   [updates]
   name=CentOS-$releasever - Updates
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
   #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
   #baseurl=http://vault.centos.org/7.9.2009/x86_64/os/
   baseurl=http://vault.centos.org/7.9.2009/updates/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
    
   #additional packages that may be useful
   [extras]
   name=CentOS-$releasever - Extras
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
   #$baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
   #baseurl=http://vault.centos.org/7.9.2009/x86_64/os/
   baseurl=http://vault.centos.org/7.9.2009/extras/$basearch/
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
    
   #additional packages that extend functionality of existing packages
   [centosplus]
   name=CentOS-$releasever - Plus
   #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
   #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
   #baseurl=http://vault.centos.org/7.9.2009/x86_64/os/
   baseurl=http://vault.centos.org/7.9.2009/centosplus/$basearch/
   gpgcheck=1
   enabled=0
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
   

3. 清除缓存

   sudo yum clean all
   sudo yum makecache
   

4. 添加阿里云镜像源

   curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
   wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
   

5. 查看文件并验证

    cat CentOS-Base.repo
    sudo yum clean all
    sudo yum makecache
   

参考

CSDN

​外链