Record approx disk usage for 45 roles (to iiab.ini)

roles/moodle/tasks/install.yml

@@ -17,6 +17,11 @@
     name: postgresql
 
 
+- name: Record (initial) available disk space
+  shell: df -PB1 $(findmnt / -o SOURCE -n) | awk 'NR==2 {print $4}'
+  register: df1
+
+
 # 2021-07-02: Let's monitor & learn from these 2 pages year-by-year:
 # https://docs.moodle.org/19/en/PHP_settings_by_Moodle_version#PHP_Extensions_and_libraries
 # https://github.com/moodlebox/moodlebox/blob/master/roles/packages/vars/main.yml
@@ -189,6 +194,17 @@
 
 # RECORD Moodle AS INSTALLED
 
+- name: Record (final) available disk space
+  shell: df -PB1 $(findmnt / -o SOURCE -n) | awk 'NR==2 {print $4}'
+  register: df2
+
+- name: Add 'moodle_disk_usage = {{ df1.stdout|int - df2.stdout|int }}' to {{ iiab_ini_file }}
+  ini_file:
+    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
+    section: moodle
+    option: moodle_disk_usage
+    value: "{{ df1.stdout|int - df2.stdout|int }}"
+
 - name: "Set 'moodle_installed: True'"
   set_fact:
     moodle_installed: True