backup_base: Fix data directory path

roles/backup_base/tasks/main.yml

@@ -16,7 +16,7 @@
 
 - name: Create backup directory
   ansible.builtin.file:
-    path: /export/backup
+    path: "{{ backup_datadir }}"
     state: directory
     mode: "0750"
     owner: root
@@ -25,11 +25,12 @@
 - name: Link backup directory
   ansible.builtin.file:
     dest: /srv/backup
-    src: /export/backup
+    src: "{{ backup_datadir }}"
     state: link
     owner: root
     group: "{{ ansible_wheel }}"
     follow: false
+  when: backup_datadir != "/srv/backup"
 
 - name: Create authorized_keys
   ansible.builtin.copy: