Add systemd symlink

tasks/install.yml

@@ -27,7 +27,9 @@
           - monitoring-plugins-systemd
         state: present
         default_release: "{{ ansible_distribution_release }}-backports"
-      when: icinga_plugin_systemd.rc == 0
+      when:
+        - ansible_distribution_release == "bullseye"
+        - icinga_plugin_systemd.rc == 0
 
     - name: Bookworm packages present
       ansible.builtin.apt:
@@ -36,6 +38,34 @@
         state: present
       when: ansible_distribution_release is regex('^bookworm$')
 
+    - name: Check if /usr/lib/nagios/plugins/check_systemd exists
+      ansible.builtin.stat:
+        path: /usr/lib/nagios/plugins/check_systemd
+      register: icinga_plugin_systemd_file
+
+    - name: Check if /usr/lib/nagios/plugins/check_systemd.py exists
+      ansible.builtin.stat:
+        path: /usr/lib/nagios/plugins/check_systemd.py
+      register: icinga_plugin_systemd_symlink
+      when:
+        - icinga_plugin_systemd_file.stat.exists | bool
+        - icinga_plugin_systemd_file.stat.isreg | bool
+
+    - name: Symlink check_systemd.py to check_systemd
+      ansible.builtin.file:
+        state: link
+        src: /usr/lib/nagios/plugins/check_systemd
+        dest: /usr/lib/nagios/plugins/check_systemd.py
+        follow: false
+        mode: 0777
+        owner: root
+        group: root
+      when:
+        - icinga_plugin_systemd_file.stat.exists | bool
+        - icinga_plugin_systemd_file.stat.isreg | bool
+        - icinga_plugin_systemd_symlink is defined
+        - not icinga_plugin_systemd_symlink.stat.exists | bool
+
     - name: Icinga package present
       ansible.builtin.apt:
         pkg: