introducing systemd timer

README.md

@@ -3,6 +3,14 @@
 ansible role: akku warning
 ==========================
 
+# rewrite in progress!!!
+```
+cronjob is going to be removed!
+systemd timer intruduces
+variables may change!
+```
+
+
 This ansible role installs a bash script (per cronjob) which is executed every 3 minutes. This bash script checks if the battery level is below 25 percent and is currently not charging. If this is the case, the program [zenity](https://de.wikipedia.org/wiki/Zenity) installed by this role will generate a popup message stating that the battery is low.
 While the battery level is between 15 and 10 percent, it will also attempt to play a sound. But this does not (yet) work reliably.
 

handlers/main.yml

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

tasks/timer.yml

@@ -1,12 +1,24 @@
 ---
-- name: Check akku every 3 minutes
+- name: setup battery_check.service
   become: true
-  ansible.builtin.cron:
-    name: check if akku still okay
-    job: /opt/akku.sh
-    minute: '*/3'
-    user: '{{ akku_user }}'
-    cron_file: /etc/crontab
-    state: absent
-  failed_when: false
+  ansible.builtin.template:
+    src: 'templates/battery_check.service.j2'
+    dest: '/usr/lib/systemd/system/battery_check.service'
+    mode: 0755
+    owner: root
+    group: root
+  notify:
+    - systemctl daemon-reload
+    - systemctl start battery_check.service
 
+- name: setup battery_check.timer
+  become: true
+  ansible.builtin.template:
+    src: 'templates/battery_check.timer.j2'
+    dest: '/usr/lib/systemd/system/battery_check.timer'
+    mode: 0755
+    owner: root
+    group: root
+  notify:
+    - systemctl daemon-reload
+    - systemctl enable battery_check.timer

templates/battery_check.service.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=Check battery charging status
+
+[Service]
+Type=simple
+ExecStart=/opt/akku.sh
+User={{ akku_user }}
+
+[Install]
+WantedBy=multi-user.target

templates/battery_check.timer.j2

@@ -0,0 +1,5 @@
+[Unit]
+Description=Check battery charging status every 3 Minutes
+
+[Timer]
+OnCalendar=*:0/3

vars/main.yml

@@ -1,3 +1,3 @@
 ---
-playbook_version_number: 8175
+playbook_version_number: 8176
 playbook_version_path: 'role-akku-warning_chaos-bodensee_github.com.version'