server-setup/ansible/cpanel-update-reboot.yml

---
  - hosts: cpanel
    user: root
    tasks:
        - name: update system
          yum: name=* state=latest

        - name: check if reboot needed
          shell: LAST_KERNEL=$(rpm -q --last kernel | perl -pe 's/^kernel-(\S+).*/$1/' | head -1); CURRENT_KERNEL=$(uname -r); if [ $LAST_KERNEL != $CURRENT_KERNEL ]; then echo 'yes'; else echo 'no'; fi
          ignore_errors: true
          register: reboot_needed
        - debug: var=reboot_needed.stdout_lines

        - name: reboot if needed
          command: reboot
          when: reboot_needed.stdout.find("yes") != -1
          register: reboot_result
        - debug: var=reboot_result.stdout_lines