Cannot find a valid baseurl for repo: centos-qemu-ev/7/x86_64

# CentOS-QEMU-EV.repo
#
# Please see http://wiki.centos.org/SpecialInterestGroup/Virtualization for more
# information

[centos-qemu-ev]
name=CentOS-$releasever - QEMU EV
baseurl=https://mirrors.aliyun.com/centos/7/virt/x86_64/kvm-common    #####注释原有源，添加该行
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=virt-kvm-common
#baseurl=http://mirror.centos.org/$contentdir/$releasever/virt/$basearch/kvm-common/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Virtualization

[centos-qemu-ev-test]
name=CentOS-$releasever - QEMU EV Testing
baseurl=http://buildlogs.centos.org/centos/$releasever/virt/$basearch/kvm-common/
gpgcheck=0
enabled=0