How to wait for server restart using Ansible?

Question

I\'m trying to restart the server and then wait, using this:

- name: Restart server
  shell: reboot

- name: Wait for server to restart
  wait_for:
    port=         


        

Answer 1

I wanted to comment on Shahar post, that he is using a hardcoded host address better is to have it a variable to reference the current host ansible is configuring {{ inventory_hostname }}, so his code will be like that:

- name: Wait for server to restart
  local_action:
    module: wait_for
     host={{ inventory_hostname }}
     port=22
     delay=1
     timeout=300

Answer 2

Through trial and error + a lot of reading this is what ultimately worked for me using the 2.0 version of Ansible:

$ ansible --version
ansible 2.0.0 (devel 974b69d236) last updated 2015/09/01 13:37:26 (GMT -400)
  lib/ansible/modules/core: (detached HEAD bbcfb1092a) last updated 2015/09/01 13:37:29 (GMT -400)
  lib/ansible/modules/extras: (detached HEAD b8803306d1) last updated 2015/09/01 13:37:29 (GMT -400)
  config file = /Users/sammingolelli/projects/git_repos/devops/ansible/playbooks/test-2/ansible.cfg
  configured module search path = None

My solution for disabling SELinux and rebooting a node when needed:

---
- name: disable SELinux
  selinux: state=disabled
  register: st

- name: reboot if SELinux changed
  shell: shutdown -r now "Ansible updates triggered"
  async: 0
  poll: 0
  ignore_errors: true
  when: st.changed

- name: waiting for server to reboot
  wait_for: host="{{ ansible_ssh_host | default(inventory_hostname) }}" port={{ ansible_ssh_port | default(22) }} search_regex=OpenSSH delay=30 timeout=120
  connection: local
  sudo: false
  when: st.changed

# vim:ft=ansible:

Answer 3

2018 Update

As of 2.3, Ansible now ships with the wait_for_connection module, which can be used for exactly this purpose.

#
## Reboot
#

- name: (reboot) Reboot triggered
  command: /sbin/shutdown -r +1 "Ansible-triggered Reboot"
  async: 0
  poll: 0

- name: (reboot) Wait for server to restart
  wait_for_connection:
    delay: 75

The shutdown -r +1 prevents a return code of 1 to be returned and have ansible fail the task. The shutdown is run as an async task, so we have to delay the wait_for_connection task at least 60 seconds. 75 gives us a buffer for those snowflake cases.

wait_for_connection - Waits until remote system is reachable/usable

Answer 4

In case you don't have DNS setup for the remote server yet, you can pass the IP address instead of a variable hostname:

- name: Restart server
  command: shutdown -r now

- name: Wait for server to restart successfully
  local_action:
    module: wait_for
      host={{ ansible_default_ipv4.address }}
      port=22
      delay=1
      timeout=120

These are the two tasks I added to the end of my ansible-swap playbook (to install 4GB of swap on new Digital Ocean droplets.

Answer 5

You should change the wait_for task to run as local_action, and specify the host you're waiting for. For example:

- name: Wait for server to restart
  local_action:
    module: wait_for
      host=192.168.50.4
      port=22
      delay=1
      timeout=300