Fix mount failure during installation (preseed/late_command).

roles/debianlive/tasks/main.yml

@@ -24,6 +24,19 @@
     state: mounted
   loop:
     "{{ live_images }}"
+  when: not run_in_installer|default(false)|bool
+  notify: rebuild di-netboot menu
+
+- name: loop mount iso images after reboot
+  mount:
+    path: "/var/lib/tftpboot/d-i/n-live/{{ item.name }}"
+    src: "/var/cache/di-netboot-assistant/{{ item.iso }}"
+    fstype: iso9660
+    opts: loop,ro,nofail
+    state: present
+  loop:
+    "{{ live_images }}"
+  when: run_in_installer|default(false)|bool
   notify: rebuild di-netboot menu
 
 - name: prepare http downloads