Added my.cnf with openstack recommended settings.

roles/mariadb/tasks/main.yml

@@ -8,8 +8,21 @@
     mode: 644
     owner: root
     group: root
-- name: install service file
-  command: systemctl daemon-reload
+
+- name: make mariadb settings volume
+  file:
+    path: /srv/mariadb/etc/mysql
+    state: directory
+    mode: 0777
+
+- name: place settings file
+  copy:
+    src: files/my.cnf
+    dest: /srv/mariadb/etc/mysql
+    mode: 660
+
+- command: systemctl daemon-reload
+
 - name: make sure service is started
   systemd:
     name: mysql.service