###
应该是镜像源的问题
尝试使用清华的镜像源
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.
[BaseOS]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/...$releasever&arch=$basearch&repo=BaseOS&infra=$infra
baseurl=https://mirrors.tuna.tsinghua...$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/...$releasever&arch=$basearch&repo=extras&infra=$infra
baseurl=https://mirrors.tuna.tsinghua...$releasever/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/...$releasever&arch=$basearch&repo=centosplus&infra=$infra
baseurl=https://mirrors.tuna.tsinghua...$releasever/centosplus/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[AppStream]
name=CentOS-$releasever - AppStream
mirrorlist=http://mirrorlist.centos.org/...$releasever&arch=$basearch&repo=AppStream&infra=$infra
baseurl=https://mirrors.tuna.tsinghua...$releasever/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[PowerTools]
name=CentOS-$releasever - PowerTools
mirrorlist=http://mirrorlist.centos.org/...$releasever&arch=$basearch&repo=PowerTools&infra=$infra
baseurl=https://mirrors.tuna.tsinghua...$releasever/PowerTools/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial