Add linux_reboot playbook, update onboard_client.sh with reboot template + xcpng support

playbooks/linux_reboot.yml

@@ -0,0 +1,63 @@
+---
+- name: Bootstrap — ensure Python is available
+  hosts: linux_hosts
+  gather_facts: false
+  roles:
+    - role: preflight
+      tasks_from: bootstrap
+
+- name: Reboot Linux hosts if required (or forced)
+  hosts: linux_hosts
+  gather_facts: true
+  vars:
+    force_reboot: false   # set to true in Semaphore extra vars to reboot regardless
+  tasks:
+    - name: Check if reboot is required (Debian/Ubuntu)
+      ansible.builtin.stat:
+        path: /var/run/reboot-required
+      register: reboot_required_file
+      when: ansible_os_family == "Debian"
+
+    - name: Set reboot_needed fact (Debian/Ubuntu)
+      ansible.builtin.set_fact:
+        reboot_needed: "{{ reboot_required_file.stat.exists | default(false) }}"
+      when: ansible_os_family == "Debian"
+
+    - name: Check if reboot is required (Alpine)
+      ansible.builtin.shell: |
+        apk version -l = 2>/dev/null | grep -q kernel && echo "yes" || echo "no"
+      register: alpine_reboot_check
+      changed_when: false
+      when: ansible_os_family == "Alpine"
+
+    - name: Set reboot_needed fact (Alpine)
+      ansible.builtin.set_fact:
+        reboot_needed: "{{ alpine_reboot_check.stdout | trim == 'yes' }}"
+      when: ansible_os_family == "Alpine"
+
+    - name: Set reboot_needed fallback (RHEL or unknown)
+      ansible.builtin.set_fact:
+        reboot_needed: false
+      when: reboot_needed is not defined
+
+    - name: Report reboot status
+      ansible.builtin.debug:
+        msg: >-
+          {{ inventory_hostname }}:
+          reboot_needed={{ reboot_needed }},
+          force_reboot={{ force_reboot }}
+          — {{ 'WILL reboot' if (reboot_needed or force_reboot) else 'Skipping reboot' }}
+
+    - name: Reboot host
+      ansible.builtin.reboot:
+        reboot_timeout: 300
+        pre_reboot_delay: 10
+        post_reboot_delay: 30
+        msg: "Scheduled reboot — initiated by Ansible"
+      when: reboot_needed | bool or force_reboot | bool
+
+    - name: Reboot complete
+      ansible.builtin.debug:
+        msg: "{{ inventory_hostname }} is back online and responding"
+      when: reboot_needed | bool or force_reboot | bool
+