add transaction isolation config

tasks/conf.yml

@@ -9,3 +9,12 @@
     line: 'skip-networking'
   notify: Restart Mariadb Service
   when: mariadb_disable_tcp
+
+- name: Define Transaction Isolation
+  lineinfile:
+    path: /etc/my.cnf.d/server.cnf
+    state: present
+    insertafter: '^\[mysqld\]'
+    regexp: '^transaction_isolation'
+    line: 'transaction_isolation=READ-COMMITTED'
+  notify: Restart Mariadb Service