The ovirt-master-glusterfs-7-el8 upstream repo is broken which is causing all mirror syncs to fail with error:
Error setting up repositories: failure: repodata/repomd.xml from ovirt-master-glusterfs-7-el8: [Errno 256] No more mirrors to try.
This is likely related to the release of Gluster-7.5 which caused a move of the LATEST repo to one that doesn't have el8 (or rl7 to that matter):
https://download.gluster.org/pub/gluster/glusterfs/7/7.4/CentOS/ (2020-03-18 14:05)
https://download.gluster.org/pub/gluster/glusterfs/7/7.5/CentOS/ (2020-04-16 11:19)
https://download.gluster.org/pub/gluster/glusterfs/7/LATEST/CentOS/ (2020-04-16 11:19)
We need to report this inconsistency upstream. As a workaround we can explicitly mirror 7.4 until el8 builds appear for 7.5