Make fsid dynamic; Add backup validation - verify rear_force_backup

roles/nfs_export/tasks/main.yml

@@ -39,7 +39,11 @@
     path: /etc/exports
     state: present
     line: "{{ rear_nfs_export_share }} {{ _options }}"
+    create: true
+    mode: "0644"
+    owner: root
+    group: root
   loop: "{{ client_ips | list | flatten }}"
   vars:
-    _options: "{{ item }}(fsid=0,rw,sync,no_subtree_check,crossmnt)"
+    _options: "{{ item }}(fsid={{ rear_nfs_export_fsid }},rw,sync,no_subtree_check,crossmnt)"
   notify: Export share

roles/nfs_export/vars/main.yml

@@ -1,2 +1,3 @@
 ---
 rear_nfs_export_share: "/backups/standalone"
+rear_nfs_export_fsid: 0

roles/rear_backup/tasks/main.yml

@@ -1,4 +1,25 @@
 ---
+- name: Check for backup log presence
+  ansible.builtin.stat:
+    path: "/var/log/rear/rear-{{ ansible_hostname }}.log"
+  register: rear_backup_log_presence
+
+- name: End host if ReaR backup already exists
+  when:
+    - rear_backup_log_presence['stat']['exists'] | bool
+    - not rear_force_backup | default(false) | bool
+  block:
+    - name: Validate ReaR backup completion
+      ansible.builtin.command:
+        cmd: "grep 'Finished running mkbackup workflow' /var/log/rear/rear-{{ ansible_hostname }}.log"
+      register: validate_backup_log
+      failed_when: validate_backup_log['rc'] not in [0,1]
+
+    - name: End play if ReaR already exists
+      ansible.builtin.meta: end_host
+      when:
+        - validate_backup_log['rc'] == 0
+
 - name: Ensure nfs-utils and rear packages are present
   ansible.builtin.package:
     name: