Reduce Apache dependency in usb_lib & nginx roles

roles/4-server-options/tasks/main.yml

@@ -41,10 +41,9 @@
     name: samba
   when: samba_install | bool
 
-# 2020-02-12: what was roles/homepage lives in roles/www_base &
-# roles/www_options for now.  Eventually softcoding of iiab_home_url
-# should happen everywhere (incl Admin Console) to allow more field
-# options, e.g. changing /library/www/html/home even when offline...
+# 2020-20-17: what was roles/homepage lives in roles/www_options.  Eventually
+# softcoding of iiab_home_url should happen everywhere (incl Admin Console) for
+# more field options, e.g. changing /library/www/html/home even when offline...
 
 - name: WWW_OPTIONS (WWW_BASE should have been installed earlier)
   include_role:

roles/nginx/tasks/enable-or-disable.yml

@@ -2,7 +2,8 @@
   systemd:
     name: "{{ apache_service }}"    # apache2 or httpd, per /opt/iiab/iiab/vars/<OS>.yml
     state: stopped
-  when: apache_installed is defined
+  ignore_errors: yes
+  # 'when: apache_installed is defined' insuff b/c mysql's php installs apache2
 
 - name: Install /etc/{{ apache_service }}/ports.conf from template 1 of 2 (ports.conf.j2) if nginx_enabled, to enable Apache port {{ apache_port }} localhost only
   template:

roles/nginx/tasks/install.yml

@@ -1,19 +1,20 @@
 # This stanza can likely be removed later in 2020:
-- name: 'Remove legacy files if present: /etc/systemd/system/uwsgi.service, {{ nginx_conf_dir }}/usb-lib.conf, {{ nginx_conf_dir }}/modules.conf'
-  file:
-    path: "{{ item.path }}"
-    state: absent
-  with_items:
-    - { path: "/etc/systemd/system/uwsgi.service" }
-    - { path: "{{ nginx_conf_dir }}/usb-lib.conf" }
-    - { path: "{{ nginx_conf_dir }}/modules.conf" }
+#
+# - name: 'Remove legacy files if present: /etc/systemd/system/uwsgi.service, {{ nginx_conf_dir }}/usb-lib.conf, {{ nginx_conf_dir }}/modules.conf'
+#   file:
+#     path: "{{ item.path }}"
+#     state: absent
+#   with_items:
+#     - { path: "/etc/systemd/system/uwsgi.service" }
+#     - { path: "{{ nginx_conf_dir }}/usb-lib.conf" }
+#     - { path: "{{ nginx_conf_dir }}/modules.conf" }
 
 - name: Stop '{{ apache_service }}' systemd service
   systemd:
     name: "{{ apache_service }}"    # apache2 or httpd, per /opt/iiab/iiab/vars/<OS>.yml
     state: stopped
-  when: apache_installed is defined
-  #ignore_errors: yes
+  ignore_errors: yes
+  # 'when: apache_installed is defined' insuff b/c mysql's php installs apache2
 
 - name: Install required and helper packages for NGINX
   package:

roles/usb_lib/tasks/apache.yml

@@ -0,0 +1,12 @@
+- name: Enable http://box/usb via Apache
+  command: a2ensite content_dir.conf
+  when: usb_lib_enabled | bool
+
+- name: Disable http://box/usb via Apache
+  command: a2dissite content_dir.conf
+  when: not usb_lib_enabled
+
+- name: (Re)Start '{{ apache_service }}' systemd service
+  systemd:
+    name: "{{ apache_service }}"    # apache2 or httpd, as set in /opt/iiab/iiab/vars/<OS>.yml
+    state: restarted

roles/usb_lib/tasks/main.yml

@@ -30,7 +30,13 @@
   when: usb_lib_installed is undefined
 
 
-- include_tasks: enable-or-disable.yml
+- name: Enable/Disable/Restart Apache if primary
+  include_tasks: apache.yml
+  when: not nginx_enabled
+
+- name: Enable/Disable/Restart NGINX if primary
+  include_tasks: nginx.yml
+  when: nginx_enabled | bool
 
 
 - name: Put variable in iiab.env that enables display of content at root of USB

roles/usb_lib/tasks/nginx.yml

@@ -28,10 +28,7 @@
     state: absent
   when: not usb_lib_enabled
 
-- name: Enable http://box/usb via Apache, if usb_lib_enabled
-  command: a2ensite content_dir.conf
-  when: apache_install and usb_lib_enabled
-
-- name: Disable http://box/usb via Apache, if not usb_lib_enabled
-  command: a2dissite content_dir.conf
-  when: apache_install and not usb_lib_enabled
+- name: Restart 'nginx' systemd service
+  systemd:
+    name: nginx
+    state: restarted