Cannot find a valid baseurl for repo: centos-nfs-ganesha28/7/x86_64

# CentOS-NFS-Ganesha-28.repo
#
# Please see http://wiki.centos.org/SpecialInterestGroup/Storage for more
# information

[centos-nfs-ganesha28]
name=CentOS-$releasever - NFS Ganesha 2.8
baseurl=http://vault.centos.org/centos/7/storage/x86_64/nfs-ganesha-28####注释原有源，并添加该行内容
#mirrorlist=http://mirrorlist.centos.org?arch=$basearch&release=$releasever&repo=storage-nfs-ganesha-28
#baseurl=https://mirror.centos.org/$contentdir/$releasever/storage/$basearch/nfs-ganesha-28/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Storage

[centos-nfs-ganesha28-test]
name=CentOS-$releasever - NFS Ganesha 2.8 Testing
baseurl=https://buildlogs.centos.org/centos/$releasever/storage/$basearch/nfs-ganesha-28/
gpgcheck=0
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Storage

保存文件后，记得yum clean all和yum makecache