Centos8为 repo ‘AppStream’下载元数据失败

问题描述

在VMware中安装完Centos8虚拟机后，想配置ssh服务，但是使用yum下载openssh-server报错，报错如图所示：

解决方法

修改 /etc/yum.repos.d/文件夹下的CentOS-Base.repo，CentOS-AppStream.repo，CentOS-Extras.repo三个与yum下载的文件
修改如下：
注释mirrorlist，把baseurl取消注释并修改为阿里云镜像地址

使用命令vim /etc/yum.repos.d/CentOS-Base.repo进行编辑

# 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-stream/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

使用命令vim /etc/yum.repos.d/CentOS-AppStream.repo进行编辑

# 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-stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

使用命令vim /etc/yum.repos.d/CentOS-Extras.repo进行编辑

# 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-stream/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

清除所有缓存文件

yum clean all

制作元数据缓存

yum makecache

方案结果

成功解决！