introducing systemd timer

defaults/main.yml

@@ -33,8 +33,10 @@ restic_archiver__owner: 'root'
 restic_archiver__group: 'root'
 
 # shedule restic cronjob
-restic_archiver__hour: '3'
+restic_archiver__hour: '4'
-restic_archiver__minute: '32'
+restic_archiver__minute: '23'
+restic_archiver__oncalendar: '*-*-* 04:23:00'
+restic_archiver__randomizeddelaysec: '900'
 
 # validate if disk is mounted
 restic_archiver__mount_required: false
@@ -66,3 +68,5 @@ restic_archiver__cache_config: false
 restic_archiver__cache_dir: '~/.cache/restic'
 
 restic_archiver__prune: false
+
+restic_archiver__use_systemd_timer: true

handlers/main.yml

@@ -0,0 +1,18 @@
+---
+- name: systemctl daemon-reload
+  become: true
+  ansible.builtin.systemd:
+    daemon_reload: true
+
+- name: systemctl start restic-archiver.timer
+  become: true
+  ansible.builtin.systemd:
+    name: restic-archiver.timer
+    enabled: true
+    state: started
+
+- name: systemctl enable restic-archiver.service
+  become: true
+  ansible.builtin.systemd:
+    name: restic-archiver.service
+    enabled: true

tasks/main.yml

@@ -18,7 +18,11 @@
 
 - name: create cronjob
   ansible.builtin.include_tasks: cron.yml
-# todo: replace with systemd timer
+  when: not restic_archiver__use_systemd_timer | bool
+
+- name: create systemd timer
+  ansible.builtin.include_tasks: systemd.yml
+  when: restic_archiver__use_systemd_timer | bool
 
 - name: install requirements for mailing
   ansible.builtin.include_tasks: mail.yml

tasks/systemd.yml

@@ -0,0 +1,24 @@
+---
+- name: create restic-archiver.service
+  become: true
+  ansible.builtin.template:
+    src: templates/restic-archiver.service.j2
+    dest: /lib/systemd/system/restic-archiver.service
+    mode: 0644
+    owner: root
+    group: root
+  notify:
+    - systemctl daemon-reload
+    - systemctl enable restic-archiver.service
+
+- name: create restic-archiver.timer
+  become: true
+  ansible.builtin.template:
+    src: templates/restic-archiver.timer.j2
+    dest: /lib/systemd/system/restic-archiver.timer
+    mode: 0644
+    owner: root
+    group: root
+  notify:
+    - systemctl daemon-reload
+    - systemctl start restic-archiver.timer

templates/restic-archiver.service.j2

@@ -0,0 +1,11 @@
+[Unit]
+Description=restic-archiver
+Documentation=https://github.com/roles-ansible/ansible_role_restic_archiver.git
+
+[Service]
+Type=oneshot
+ExecStart=/opt/restic-backup.sh
+TimeoutStartSec=0
+{% if restic_archiver__log_output -%}
+StandardOutput=append:/var/log/restic/restic_archiver.log
+{%- endif -%}

templates/restic-archiver.timer.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=Systemd Timer to run the Restic archiver from /opt/restic-backup.sh
+
+[Timer]
+OnCalendar={{ restic_archiver__oncalendar | default('*-*-* 04:23:00') }}
+RandomizedDelaySec={{ restic_archiver__randomizeddelaysec }}
+Persistent=true
+
+[Install]
+WantedBy=timers.target

vars/main.yml

@@ -1,3 +1,3 @@
 ---
-playbook_version_number: 49  # should be int
+playbook_version_number: 50  # should be int
 playbook_version_path: 'role-restic_archiver_roles-ansible_github.com.version'