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

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

- debug:
    var: mongodb_install
- debug:
    var: mongodb_enabled
- debug:
    var: mongodb_installed


- debug:
    var: is_debian
- debug:
    var: is_raspbian

# might be able to lift this once we know using bionic would work
- name: EXIT 'mongodb' ROLE & CONTINUE, IF 'is_debian_10 and aarch64 and not is_raspbian' i.e. TRUE DEBIAN with arch64
  fail:    # FORCE IT RED THIS ONCE!
    msg: ATTEMPTED MongoDB INSTALLATION WITH (TRUE) DEBIAN aarch64, which is not supported upstream.  Nevertheless IIAB will continue (consider this a warning!)
  when: (ansible_architecture == "aarch64") and is_debian_10 and not is_raspbian
  ignore_errors: yes

# ELSE...
- name: Install MongoDB if 'mongodb_installed' not defined, e.g. in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
  include_tasks: install.yml
  when: mongodb_installed is undefined and not (ansible_architecture == "aarch64" and is_debian_10 and not is_raspbian)

- name: Disable & Stop 'mongodb' service, if not mongodb_enabled
  systemd:
    name: mongodb
    enabled: no
    state: stopped
  when: not mongodb_enabled and mongodb_installed is defined

#'mongodb' systemd service - started on demand by sugarizer
# Just recording that mongodb should be running

- name: Add 'mongodb' variable values to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
    section: mongodb
    option: "{{ item.option }}"
    value: "{{ item.value | string }}"
  with_items:
    - option: name
      value: MongoDB
    - option: description
      value: '"MongoDB is an open-source document database that provides high performance, high availability, and automatic scaling."'
    - option: enabled
      value: "{{ mongodb_enabled }}"