Add the MAINTENANCE_BANNER_TEXT variable to generic_env_config

playbooks/roles/edxapp/defaults/main.yml

@@ -834,6 +834,9 @@ EDXAPP_PARENTAL_CONSENT_AGE_LIMIT: 13
 EDXAPP_SCORM_PKG_STORAGE_DIR: !!null
 EDXAPP_SCORM_PLAYER_LOCAL_STORAGE_ROOT: !!null
 
+# maintenance banner message (only actually enabled via waffle switch)
+EDXAPP_MAINTENANCE_BANNER_TEXT: "Sample banner message"
+
 #-------- Everything below this line is internal to the role ------------
 
 #Use YAML references (& and *) and hash merge <<: to factor out shared settings
@@ -1223,6 +1226,7 @@ generic_env_config:  &edxapp_generic_env
   POLICY_CHANGE_GRADES_ROUTING_KEY: "{{ EDXAPP_POLICY_CHANGE_GRADES_ROUTING_KEY }}"
   PROCTORING_SETTINGS: "{{ EDXAPP_PROCTORING_SETTINGS }}"
   EXTRA_MIDDLEWARE_CLASSES: "{{ EDXAPP_EXTRA_MIDDLEWARE_CLASSES }}"
+  MAINTENANCE_BANNER_TEXT: "{{ EDXAPP_MAINTENANCE_BANNER_TEXT }}"
 
 lms_auth_config:
   <<: *edxapp_generic_auth