feat: setup galera cluster member profile

- add eyaml support for role
- add /data volume for galera cluster members
- create profiles::selinux namespace for defining selinux configuration
  - create profiles::selinux::mysqld for managing specifics for mysqld
  - create profiles::selinux::setenforce to manage selinux mode
- parameterised options required in mysqld::server module
- add mariadb repo
- add additional facts for managing mysqld and galera

site/profiles/manifests/yum/mariadb.pp

@@ -0,0 +1,24 @@
+# Class: profiles::yum::mariadb
+#
+# This class manages the mariadb yum repository for the system.
+#
+class profiles::yum::mariadb (
+  String        $baseurl = 'http://repos.main.unkin.net',
+  String        $version = '11.2',
+  Enum[
+    'daily',
+    'weekly',
+    'monthly'
+  ]             $snapshot = 'daily',
+) {
+  $release = $facts['os']['release']['major']
+  $basearch = $facts['os']['architecture']
+
+  yumrepo { 'mariadb':
+    name    => 'mariadb',
+    descr   => 'mariadb repository',
+    target  => '/etc/yum.repos.d/mariadb.repo',
+    baseurl => "${baseurl}/mariadb/${version}/el${release}-${snapshot}/${basearch}/os/",
+    gpgkey  => "${baseurl}/mariadb/${version}/el${release}-${snapshot}/${basearch}/os/RPM-GPG-KEY-MariaDB",
+  }
+}