CODEWITHSUNDEEP
ansible
freeAR
freeAR

Reputation: 1145

Ansible: Reboot if no user logged in (ansible.builtin.reboot)

We need to reboot a Linux server if nobody is logged in.

ansible.builtin.reboot doesn't seem to have an option to check for that.

Does Ansible have a way of checking if there are users logged in (kind of a who command)?

Upvotes: 0

Views: 559

Answers (2)

U880D
U880D

Reputation: 12080

You can just use the who command

---
- hosts: localhost
  become: false
  gather_facts: false

  tasks:

  - name: Gather logged in user
    shell:
      cmd: who | cut -d " " -f 1
    register: result
    changed_when: false
    check_mode: false

  - name: Show result
    debug:
      var: result.stdout_lines
    when: result.stdout_lines | length > 1

and may check the return values as in the example given and perform further tasks like

- name: Reboot if required
  reboot:
    reboot_timeout: 150
  when: reboot_allowed # or result.stdout_lines | length < 2

Upvotes: 1

queeg
queeg

Reputation: 9412

To find out who is currently logged in you have a number of options in linux itself. On https://linuxhandbook.com/linux-logged-in-users/ you can find these commands:

w
who
users
finger

Use a shell module to run the command and count the lines. This could roughly look like this (I did not run these commands to check):

- name: count logged in users
  shell: "who | wc --lines"
  register: usercount

- name: reboot if noone is logged on
  command: /sbin/reboot
  when: "usercount.stdout < 2"

Upvotes: 1

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