Adapted for RHEL 7:

Separated RedHat.yml files into RedHat 6 and RedHat 7 files

Adapted main.yml to point to the correct file

tasks/main.yml

@@ -2,6 +2,17 @@
 # Include variables and define needed variables.
 - name: Include OS-specific variables.
   include_vars: "{{ ansible_os_family }}.yml"
+  when: ansible_os_family  != "RedHat"
+
+# Include RedHat 6 variables (mysql)
+- name: Include OS-specific variables.
+  include_vars: "{{ ansible_os_family }}-{{ ansible_lsb.major_release }}.yml"
+  when: ansible_lsb.major_release < "7"
+
+# Include RedHat 7 variables (mariadb)
+- name: Include OS-specific variables.
+  include_vars: "{{ ansible_os_family }}-{{ ansible_lsb.major_release }}.yml"
+  when:  ansible_os_family >= "7"
 
 - name: Define mysql_packages.
   set_fact:

vars/RedHat-7.yml

@@ -0,0 +1,15 @@
+---
+__mysql_daemon: mariadb
+__mysql_packages:
+  - mariadb
+  - mariadb-server
+  - mariadb-libs
+  - MySQL-python
+  - perl-DBD-MySQL
+__mysql_slow_query_log_file: /var/log/mysql-slow.log
+mysql_log_error: /var/log/mariadb/mariadb.log
+mysql_syslog_tag: mariadb
+mysql_pid_file: /var/run/mariadb/mariadb.pid
+mysql_config_file: /etc/my.cnf
+mysql_config_include_dir: /etc/my.cnf.d
+mysql_socket: /var/lib/mysql/mysql.sock