MariaDB 10.x YUM install...
yum -q -y --disableplugin=fastestmirror,downloadonly --disablerepo=epel,rpmforge install MariaDB-client MariaDB-common MariaDB-compat MariaDB-devel MariaDB-server MariaDB-shared
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Loaded plugins: priorities
No plugin match for: downloadonly
Resolving Dependencies
--> Running transaction check
---> Package MariaDB-client.x86_64 0:10.0.23-1.el7.centos will be installed
---> Package MariaDB-common.x86_64 0:10.0.23-1.el7.centos will be installed
---> Package MariaDB-compat.x86_64 0:10.0.23-1.el7.centos will be installed
---> Package MariaDB-devel.x86_64 0:10.0.23-1.el7.centos will be installed
---> Package MariaDB-server.x86_64 0:10.0.23-1.el7.centos will be installed
---> Package MariaDB-shared.x86_64 0:10.0.23-1.el7.centos will be installed
--> Finished Dependency Resolution
Error: Rpmdb checksum is invalid: pkg checksums: mariadb-libs-1:5.5.44-2.el7.centos.x86_64

real	0m3.682s
user	0m3.462s
sys	0m0.148s
cp: cannot stat ‘/etc/my.cnf’: No such file or directory
sed: can't read /etc/my.cnf: No such file or directory
sed: can't read /etc/my.cnf: No such file or directory
sed: can't read /etc/my.cnf: No such file or directory
sed: can't read /etc/my.cnf: No such file or directory

systemctl restart mysql.service
Failed to restart mysql.service: Unit mysql.service failed to load: No such file or directory.
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Installing MariaDB 10 plugins
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mysql -e "INSTALL SONAME 'metadata_lock_info';"
inc/mariadb_install.inc: line 229: mysql: command not found
mysql -e "INSTALL SONAME 'query_cache_info';"
inc/mariadb_install.inc: line 231: mysql: command not found
mysql -e "INSTALL SONAME 'query_response_time';"
inc/mariadb_install.inc: line 233: mysql: command not found
mysql -t -e "SELECT * FROM mysql.plugin;"
inc/mariadb_install.inc: line 240: mysql: command not found
mysql -t -e "SHOW PLUGINS;"
inc/mariadb_install.inc: line 242: mysql: command not found
mysql -t -e "SHOW ENGINES;"
inc/mariadb_install.inc: line 244: mysql: command not found

Package perl-DBD-MySQL-4.023-5.el7.x86_64 already installed and latest version
y

Copying MariaDB my-mdb10-min.cnf file to /etc/my.cnf

exclude line exists... adding exclude line for mysql*
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* Starting MariaDB Secure Installation
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inc/mariadb_install.inc: line 523: mysql_upgrade: command not found
systemctl restart mysql.service
Failed to restart mysql.service: Unit mysql.service failed to load: No such file or directory.
systemctl stop mysql.service
Failed to stop mysql.service: Unit mysql.service not loaded.
gzip: /var/lib/mysql/ib_logfile0: No such file or directory
gzip: /var/lib/mysql/ib_logfile1: No such file or directory
systemctl start mysql.service
Failed to start mysql.service: Unit mysql.service failed to load: No such file or directory.
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* MariaDB installed
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systemctl stop mysql.service
Failed to stop mysql.service: Unit mysql.service not loaded.