Add lookup for vars

roles/containers/tasks/main.yml

@@ -47,16 +47,16 @@
       AMQP_URL: "{{ amqp_protocol }}://{{ rabbitmq_username }}:{{ rabbitmq_password }}@{{ rabbitmq_host }}/{{ rabbitmq_vhost | urlencode | replace('/', '%2F') }}"
       DATABASE_URL: "ecto://{{ wanda_postgres_user }}:{{ wanda_postgres_password }}@{{ wanda_postgres_host }}/{{ wanda_postgres_db }}"
 
-- name: Verify that alerting configuration variables are defined if alerting is enabled
+- name: Verify that alerting configuration variables are defined in json configuration if alerting is enabled
   ansible.builtin.assert:
     that:
       - alerting_env is defined
-      - alerting_env | length > 0
-      - alerting_env != None
-      - alerting_env != ""
+      - "{{ lookup('vars', alerting_env) | length > 0 }}"
+      - "{{ lookup('vars', alerting_env) != None }}"
+      - "{{ lookup('vars', alerting_env) != '' }}"
 
-    fail_msg: "The variable {{ alerting_env }} needs to be set for alerting to work"
-    success_msg: "Required variable {{ alerting_env }} is defined"
+    fail_msg: "{{ alerting_env }} needs to be set in json configuration to enable alerting"
+    success_msg: "{{ alerting_env }} is set in json configuration"
   loop_control:
     loop_var: alerting_env
   with_items: