Fix cron job, add assert to prevent duplicate timers

EXAMPLES.md

@@ -26,7 +26,7 @@ Installs and configures the Borgmatic client and also initializes the repo on th
     borg_user: "srv_backup"
     borg_group: "srv_backup"
     borg_ssh_key_file_path: "{{ backup_user_info.home }}/.ssh/backup"
-    borg_ssh_command: "ssh -i {{ borg_ssh_key_file_path }} -o StrictHostKeyChecking=no"
+    borg_ssh_command: "ssh -i {{ borg_ssh_key_file_path }} -o StrictHostKeyChecking=accept-new"
     borgmatic_timer: systemd
     borg_source_directories:
       - /srv/www

README.md

@@ -7,8 +7,9 @@ Set up encrypted, compressed and deduplicated backups using [BorgBackup](https:/
 Works great with [BorgBase.com](https://www.borgbase.com) - Simple and Secure Hosting for your Borg Repositories. To manage BorgBase repos via Ansible, also see Andy Hawkins' [BorgBase Collection](https://galaxy.ansible.com/adhawkins/borgbase).
 
 Main features:
-- Set up Borg and Borgmatic
+- Install Borg and Borgmatic from PyPi or distro package
-- Schedule regular backups using Cron or Systemd timer.
+- Set up Borgmatic config
+- Schedule regular backups using Cron or Systemd timer
 
 
 ## Example Playbook with root as backup user and Cron timer
@@ -40,7 +41,7 @@ Main features:
 ```
 
 ## Example Playbook with service user and Systemd timer
-`` Attention: `` The following implementation leads to problems.
+**Attention**: The following implementation leads to problems.
 If you already use this role and use the user: "root" or the SSH key id_ed25519!
 
 ```
@@ -51,7 +52,7 @@ If you already use this role and use the user: "root" or the SSH key id_ed25519!
     borg_repository: ssh://m5vz9gp4@m5vz9gp4.repo.borgbase.com/./repo
     borgmatic_timer: systemd
     borg_ssh_key_file_path: "{{ backup_user_info.home }}/.ssh/backup"
-    borg_ssh_command: "ssh -i {{ borg_ssh_key_file_path }} -o StrictHostKeyChecking=no"
+    borg_ssh_command: "ssh -i {{ borg_ssh_key_file_path }} -o StrictHostKeyChecking=accept-new"
     borg_user: "srv_backup"
     borg_group: "srv_backup"
     borg_source_directories:

tasks/noauto_create_timer_cron.yml

@@ -6,7 +6,7 @@
 
 - name: Add Cron job for borgmatic
   block:
-    - name: Add cron job for create, check and prune
+    - name: Add single Cron job for borgmatic
       cron:
         name: "{{ borgmatic_timer_cron_name }}"
         hour: "{{ borgmatic_timer_hour }}"
@@ -18,6 +18,7 @@
     - name: Ensure separate check cron job is absent
       cron:
         name: "{{ borgmatic_timer_cron_name }}-check"
+        cron_file: "{{ borgmatic_timer_cron_name }}"
         state: absent
 
 - name: Set PATH for borgmatic cron job.

tasks/noauto_create_timer_systemd.yml

@@ -1,4 +1,18 @@
 ---
+- name: Register existence of Borgmatic cron file.
+  cron:
+    name: "{{ borgmatic_timer_cron_name }}"
+    cron_file: "{{ borgmatic_timer_cron_name }}"
+    state: absent
+  check_mode: true
+  register: cron_file_exists
+
+- name: Ensure no Borgmatic Cron file exists.
+  ansible.builtin.assert:
+    that:
+      - not cron_file_exists.changed
+    fail_msg: Found an existing Borgmatic Cron job. Please remove before using Systemd timer.
+
 - name: Create borgbackup timer
   block:
     - name: Copy systemd files
@@ -21,7 +35,7 @@
     - name: Stop fresh installed borgmatic.timer and borgmatic.service
       when: "'borgmatic.service' not in ansible_facts.services"
       block:
-        - name: Set borgmatic services to stopped - fresh installed
+        - name: Set borgmatic services to stopped - newly installed
           ansible.builtin.systemd:
             name: "{{ item }}"
             state: stopped
@@ -33,7 +47,7 @@
             - borgmatic.service
 
         # bug: Need own section without masked else the timer are skipped
-        - name: Set borgmatic timers to stopped - fresh installed
+        - name: Set borgmatic timers to stopped - newly installed
           ansible.builtin.systemd:
             name: "{{ item }}"
             state: stopped