variable background image

defaults/main.yml

@@ -2,3 +2,7 @@ display_manager_state: multiuser
 
 display_manager_mainentance_text: Wartungsmodus – bitte nicht abschalten!
 display_manager_mainentance_icon: preferences-system
+
+display_manager_background_image_url: https://upload.wikimedia.org/wikipedia/commons/5/52/Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg
+display_manager_background_image_path: /usr/share/lightdm/background.jpg
+display_manager_background_image_checksum: sha256:df1106e46a2cb9ec46fb50c415f9648270bafb11c0762072f9804f8d1705e4b5

tasks/main.yml

@@ -43,9 +43,9 @@
 
 - name: download background image
   get_url:
-    url: https://upload.wikimedia.org/wikipedia/commons/5/52/Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg
-    dest: /usr/share/lightdm/background.jpg
-    checksum: sha256:df1106e46a2cb9ec46fb50c415f9648270bafb11c0762072f9804f8d1705e4b5
+    url: "{{display_manager_background_image_url}}"
+    dest: "{{display_manager_background_image_path}}"
+    checksum: "{{display_manager_background_image_checksum}}"
 
 - name: lightdm started
   service:

templates/lightdm-gtk-greeter.conf.j2

@@ -47,7 +47,7 @@
 #  transition-duration = overrides default value
 #
 [greeter]
-background=/usr/share/lightdm/background.jpg
+background={{display_manager_background_image_path}}
 user-background=false
 #theme-name=
 #icon-theme-name=