roles/nextcloud: Install prereq MySQL / MariaDB

roles/3-base-server/README.rst

@@ -15,7 +15,7 @@
 
 This 3rd `stage <https://github.com/iiab/iiab/wiki/IIAB-Contributors-Guide#ansible>`_ installs base server infra that `Internet-in-a-Box (IIAB) <https://internet-in-a-box.org/>`_ requires, including:
 
-- |ss| `MySQL <https://github.com/iiab/iiab/blob/master/roles/mysql>`_ (database underlying many/most user-facing apps). |se| |nbsp|  *As of 2023-11-05, MySQL / MariaDB is NO LONGER INSTALLED by 3-base-server — instead it's installed on-demand — as a dependency of Matomo, MediaWiki, WordPress &/or Admin Console.*  This IIAB role (roles/mysql) also installs apt package:
+- |ss| `MySQL <https://github.com/iiab/iiab/blob/master/roles/mysql>`_ (database underlying many/most user-facing apps). |se| |nbsp|  *As of 2023-11-05, MySQL / MariaDB is NO LONGER INSTALLED by 3-base-server — instead it's installed on-demand — as a dependency of Matomo, MediaWiki, Nextcloud, WordPress &/or Admin Console.*  This IIAB role (roles/mysql) also installs apt package:
    - **php{{ php_version }}-mysql** — which forcibly installs **php{{ php_version }}-common**
 - `NGINX <https://github.com/iiab/iiab/blob/master/roles/nginx>`_ web server (with Apache in some lingering cases).  This IIAB role also installs apt package:
    - **php{{ php_version }}-fpm** — which forcibly installs **php{{ php_version }}-cli**, **php{{ php_version }}-common** and **libsodium23**

roles/3-base-server/tasks/main.yml

@@ -5,7 +5,7 @@
 
 # 2023-11-05: MySQL (actually MariaDB) had been mandatory, installed on every
 # IIAB by 3-base-server.  Now installed on demand -- as a dependency of Matomo,
-# MediaWiki, WordPress &/or Admin Console.
+# MediaWiki, Nextcloud, WordPress &/or Admin Console.
 # - name: MYSQL + CORE PHP
 #   include_role:
 #     name: mysql

roles/nextcloud/tasks/install.yml

@@ -1,3 +1,18 @@
+- name: "Set 'mysql_install: True' and 'mysql_enabled: True'"
+  set_fact:
+    mysql_install: True
+    mysql_enabled: True
+
+- name: MYSQL - run 'mysql' role (attempt to install & enable MySQL / MariaDB)
+  include_role:
+    name: mysql
+
+- name: FAIL (STOP THE INSTALL) IF 'mysql_installed is undefined'
+  fail:
+    msg: "Nextcloud install cannot proceed, as MySQL / MariaDB is not installed."
+  when: mysql_installed is undefined
+
+
 - name: Record (initial) disk space used
   shell: df -B1 --output=used / | tail -1
   register: df1

vars/default_vars.yml

@@ -267,7 +267,8 @@ pi_swap_file_size: 1024
 
 # 2023-11-05: MySQL (actually MariaDB) had been mandatory, installed on every
 # IIAB by 3-base-server.  Now installed on demand -- as a dependency of Matomo,
-# MediaWiki, WordPress &/or Admin Console.  BOTH VALUES BELOW INITIALLY IGNORED:
+# MediaWiki, Nextcloud, WordPress &/or Admin Console.  SO BOTH VALUES BELOW ARE
+# INITIALLY IGNORED:
 mysql_install: False
 mysql_enabled: False
 mysql_service: mariadb