UpdateServersPlaybook/update.yml

---
- name: update all remote hosts
  hosts: allservers

  tasks:
  - name: update apt cache
    become: true
    apt: 
      update_cache: yes
      force_apt_get: yes
      cache_valid_time: 3600

  - name: update all apt packages
    become: true
    apt: 
      state: latest
      force_apt_get: yes

  - name: check to see if reboot is needed
    register: reboot_required_file
    stat: path=/var/run/reboot-required get_checksum=false

  - name: Reboot the server
    become: true
    reboot:
      msg: "Reboot initiated by Ansible due to kernel updates"
      connect_timeout: 5
      reboot_timeout: 300
      pre_reboot_delay: 0
      post_reboot_delay: 30
      test_command: uptime
    when: reboot_required_file.stat.exists