Note: The included SELinux policy files can be used for MariaDB Galera cluster. However, since these policies had been tested for a limited set of scenarios, it is highly recommended that you run mysqld in "permissive" mode even with these policies installed and report any denials on mariadb.org/jira. How to generate and load the policy module of MariaDB Galera cluster ? * Generate the SELinux policy module. # cd /policy/selinux/ # make -f /usr/share/selinux/devel/Makefile mariadb-server.pp * Load the generated policy module. # semodule -i /path/to/mariadb-server.pp * Lastly, run the following command to allow tcp/4568 and udp/4567. # semanage port -a -t mysqld_port_t -p tcp 4568 # semanage port -a -t mysqld_port_t -p udp 4567 How to run mysqld in permissve mode ? # semanage permissive -a mysqld_t