ansible-mysql/tasks/galera/nodes.yml

---

- name: COMMAND | GET debian.cnf from primary node
  command: cat /etc/mysql/debian.cnf
  register: debiancnf
  delegate_to: '{{ mariadb_galera_primary_node }}'
  changed_when: false

- name: COMMAND | Get current debian.cnf
  command: cat /etc/mysql/debian.cnf
  register: ondc
  changed_when: false

- block:

  - name: SERVICE | Stop MariaDB
    service:
      name: mysql
      state: stopped

  - name: COPY | Paste primary node's debian.cnf
    copy:
      content: "{{ debiancnf.stdout }}"
      dest: /etc/mysql/debian.cnf
      mode: 0600
      owner: root
      group: root
    register: paste

  - name: SERVICE | Start MariaDB
    service:
      name: mysql
      state: started

  when: debiancnf.stdout != ondc.stdout