Cannot prepare internal mirrorlist: No URLs in mirrorlist

Cannot prepare internal mirrorlist: No URLs in mirrorlist

使用docker拉取centos镜像，使用yum安装软件的时候，报错

Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                                                         50  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

更换下载源

sudo sed -i -e "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-*
或者使用
sed -i -e "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-*
即可以正常下载