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: rpi_model    # 0-init sets it from ansible_local.local_facts.rpi_model
- debug:
    var: os_ver    # Equivalent to ansible_local.local_facts.os_ver and OS_VER in /etc/iiab/iiab.env
- debug:
    var: is_debian
- debug:
    var: is_raspbian
- debug:
    var: mongodb_version

- name: Run command 'dpkg --print-architecture' to identify OS architecture (CPU arch as revealed by ansible_architecture ~= ansible_machine is NOT enough!)
  command: dpkg --print-architecture
  register: dpkg_arch
- debug:
    msg: "'dpkg --print-architecture' output: {{ dpkg_arch.stdout }}"

- block:

  - name: EXIT 'mongodb' ROLE, if 'dpkg --print-architecture' shows "armhf" or mongodb_version == "unsupported" or ansible_machine not found
    fail:    # FORCE IT RED THIS ONCE!
      msg: MongoDB 3.2+ (as needed by Sugarizer Server 1.5.0) is NO LONGER SUPPORTED on 32-bit Raspberry Pi OS.
    when: dpkg_arch.stdout == "armhf" or mongodb_version == "unsupported" or mongodb_version == "unknown"

  - 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
    # when: mongodb_installed is undefined and not (ansible_architecture == "aarch64" and is_debian_10 and not is_raspbian)

  - name: Enable or Disable MongoDB (FYI sugarizer.service auto-starts MongoDB as nec, so doesn't need this or care what happens here!)
    include_tasks: enable-or-disable.yml

  - 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: mongodb_install
        value: "{{ mongodb_install }}"
      - option: mongodb_enabled
        value: "{{ mongodb_enabled }}"

  rescue:

  - name: 'SEE ERROR ABOVE (skip_role_on_error: {{ skip_role_on_error }})'
    fail:
      msg: ""
    when: not skip_role_on_error