The virt7-testing CBS repository doesn't exist anymore:
Dwellers
$ yum upgrade […] http://cbs.centos.org/repos/virt7-testing/x86_64/os/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found […]
It seems there is a split into several repositories:
Ysul
$ links -dump http://cbs.centos.org/repos/ | grep 'virt7.*testing' [DIR] virt7-common-testing/ 03-Dec-2015 - [DIR] virt7-docker-common-testing/ 03-Dec-2015 - [DIR] virt7-docker-master-testing/ 03-Dec-2015 - [DIR] virt7-docker-upstream-testing/ 03-Dec-2015 - [DIR] virt7-kvm-common-testing/ 01-Feb-2016 - [DIR] virt7-ovirt-35-testing/ 03-Dec-2015 - [DIR] virt7-ovirt-36-testing/ 26-Jan-2016 - [DIR] virt7-ovirt-common-testing/ 12-Feb-2016 - [DIR] virt7-rkt-common-testing/ 03-Dec-2015 - [DIR] virt7-xen-44-testing/ 14-Jan-2016 - [DIR] virt7-xen-46-testing/ 11-Feb-2016 - [DIR] virt7-xen-common-testing/ 19-Jan-2016 -
I would recommend to use the following combo:
- virt7-common-testing
- virt7-docker-common-testing