OK, we are mostly set here, but for this:
yum install MariaDB-server galera-4 MariaDB-client MariaDB-shared MariaDB-backup MariaDB-common
If I'm going to use the MariaDB.repo file configured as follows:
# cat /etc/yum.repos.d/MariaDB.repo
[mariadb]
name = MariaDB
baseurl = Index of...