Add assertion to check Immich controller URL reachability and update task failure handling

update_immich.yml

@@ -111,7 +111,7 @@
       retries: "{{ immich_retries }}"
       delay: "{{ immich_delay }}"
       until: immich_controller.status == 200
-      failed_when: false
+      failed_when: false          # allow task to finish without failing the play
       changed_when: false
 
     - name: Immich | VM-side fetch (HTML via Python, with retries)  # use SSHPASS env here too
@@ -184,3 +184,20 @@
       ansible.builtin.debug:
         msg: "{{ (immich_home_html | default(''))[:500] }}"
       when: immich_home_html is defined and DEBUG == 1
+
+    # -------------------------
+    # Final assertion: controller URL must be reachable
+    # -------------------------
+
+    - name: Immich | Assert controller URL reachable (if configured)
+      ansible.builtin.assert:
+        that:
+          - >
+            not (immich_url is defined and (immich_url | length) > 0)
+            or
+            (
+              immich_controller is defined
+              and (immich_controller.status | default(0)) == 200
+            )
+        fail_msg: "Immich controller URL {{ immich_url }} is NOT reachable with HTTP 200 after retries."
+        success_msg: "Immich controller URL {{ immich_url }} is reachable with HTTP 200."