ansible waiting for reboot, really really works!

ansible-reboot.yaml

- name: 'check if reboot is required'
  shell: if [ $(readlink -f /vmlinuz) != /boot/vmlinuz-$(uname -r) ]; then echo 'yes'; else echo 'no'; fi
  ignore_errors: true
  register: reboot

- name: 'reboot...'
  shell: nohup bash -c 'sleep 2 && shutdown -r now "Ansible kernel update applied"' &
  async: 0
  poll: 0
  ignore_errors: true
  when: reboot.stdout.find('yes') != -1
  register: rebooting

- name: 'waiting...'
  local_action: wait_for host={{ ansible_host | default(inventory_hostname,boolean=True) }} search_regex='OpenSSH' port=22 state='started' delay=30 timeout=300
  become: no
  when: rebooting|changed