Here are the detailed steps for installing MariaDB (version 10.1.21) via RPMs on CentOS 7.
The RPM’s needed for the installation are all available on the MariaDB website and are given below:
jemalloc-3.6.0-1.el7.x86_64.rpm
MariaDB-10.1.21-centos7-x86_64-client.rpm
MariaDB-10.1.21-centos7-x86_64-compat.rpm
galera-25.3.19-1.rhel7.el7.centos.x86_64.rpm
jemalloc-devel-3.6.0-1.el7.x86_64.rpm
MariaDB-10.1.21-centos7-x86_64-common.rpm
MariaDB-10.1.21-centos7-x86_64-server.rpm