iiab/roles/mysql/tasks/main.yml

# "How do i fail a task in Ansible if the variable contains a boolean value?
# I want to perform input validation for Ansible playbooks"
# https://stackoverflow.com/questions/46664127/how-do-i-fail-a-task-in-ansible-if-the-variable-contains-a-boolean-value-i-want/46667499#46667499

# We assume 0-init/tasks/validate_vars.yml has DEFINITELY been run, so no need
# to re-check whether vars are defined here.  As Ansible vars cannot be unset:
# https://serverfault.com/questions/856729/how-to-destroy-delete-unset-a-variable-value-in-ansible

- name: Assert that "mysql_install is sameas true" (boolean not string etc)
  assert:
    that: mysql_install is sameas true
    fail_msg: "PLEASE SET 'mysql_install: True' e.g. IN: /etc/iiab/local_vars.yml"
    quiet: yes

- name: Assert that "mysql_enabled | type_debug == 'bool'" (boolean not string etc)
  assert:
    that: mysql_enabled | type_debug == 'bool'
    fail_msg: "PLEASE GIVE VARIABLE 'mysql_enabled' A PROPER (UNQUOTED) ANSIBLE BOOLEAN VALUE e.g. IN: /etc/iiab/local_vars.yml"
    quiet: yes

- debug:
    var: mysql_install
- debug:
    var: mysql_enabled
- debug:
    var: mysql_installed


- name: Install MySQL if 'mysql_installed' not defined, e.g. in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
  include_tasks: install.yml
  when: mysql_installed is undefined


- name: Enable & Start MySQL ({{ mysql_service }}) systemd service, if mysql_enabled
  systemd:
    name: "{{ mysql_service }}"
    daemon_reload: yes
    state: started
    enabled: yes
  when: mysql_enabled

# We had to start MySQL in order to configure it, now turn if off if not enabled
- name: Disable & Stop MySQL ({{ mysql_service }}) systemd service, if not mysql_enabled
  systemd:
    name: "{{ mysql_service }}"
    enabled: no
    state: stopped
  when: not mysql_enabled


- name: Add 'mysql' variable values to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
    section: mysql
    option: "{{ item.option }}"
    value: "{{ item.value | string }}"
  with_items:
    - option: name
      value: MySQL
    - option: description
      value: '"MySQL is a widely used free and open source (GPLv2) database, offered by most web hosting services, on a diversity of platforms."'
    - option: mysql_install
      value: "{{ mysql_install }}"
    - option: mysql_enabled
      value: "{{ mysql_enabled }}"