Junos OS

I'm building an Ansible playbook to install firmware updates on multiple switches and then schedule the devices to restart at 2 AM the next day.

What's the best way to accomplish the "reboot at 2 AM tomorrow" part?

I found the below article, but it doesn't suggest a way to schedule a reboot using a relative date.  If I use "02:00" for the "at" time, I get an error:  "reboot failed. Error: RpcError(severity: error, bad_element: None, message: that time is already past.)"

(I don't want to edit the reboot date every time I run the playbook.)

I assume there is a function in Ansible to calculate tomorrow's date, format it, and assign to a variable.   However, I'm still a newbie at using Ansible, so I'm hoping there is a simpler/better way.

  Use Ansible to Halt, Reboot, or Shut Down Junos Devices

Thanks in advance for any advice or suggestions.

Not very pretty, but works I think.

"at time" supports yymmddhhmm as per reference https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/command/request-system-reboot.html#request-system-reboot-command__d63561e236

---
- name: Calculate today's date and tomorrow at 2:00 AM
  hosts: localhost
  gather_facts: false
  tasks:
    - name: Get today's date
      set_fact:
        today_date: "{{ lookup('pipe', 'date +%y%m%d') }}"

    - name: Get the current epoch time
      set_fact:
        current_epoch: "{{ lookup('pipe', 'date +%s') | int }}"

    - name: Get tomorrow's date
      set_fact:
        tomorrow_date: "{{ ((current_epoch | int) + 86400 + 7200) }}"

    - name: Restart date
      set_fact:
        restart_date: "{{ '%y%m%d0200' | ansible.builtin.strftime(second=tomorrow_date, utc=true) }}"

    - name: Display today's date
      debug:
        msg: "Today's date is {{ today_date }}"

    - name: Display tomorrow's date at 2:00 AM
      debug:
        msg: "Restart date is {{ restart_date }}"

Results:

PLAY [Calculate today's date and tomorrow at 2:00 AM] *************************************************************************************************************************************

TASK [Get today's date] *********************************************************************************************************************
ok: [localhost]

TASK [Get the current epoch time] ***********************************************************************************************************
ok: [localhost]

TASK [Get tomorrow's date] ******************************************************************************************************************
ok: [localhost]

TASK [Restart date] ***************************************************************************************************************************
ok: [localhost]

TASK [Display today's date] ***********************************************************************************************************************************************
ok: [localhost] => {
    "msg": "Today's date is 240710"
}

TASK [Display tomorrow's date at 2:00 AM] ***********************************************************************************************************************************************
ok: [localhost] => {
    "msg": "Restart date is 2407110200"
}

PLAY RECAP **********************************************************************************************************************************
localhost                  : ok=6    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Regards

------------------------------
Andy Sharp
------------------------------

Thanks for sharing your example, a lot more simple and elegant than mine.

---
- name: Perform a Junos OS software upgrade
  hosts:
    - test102.emu.edu
  connection: local
  gather_facts: no
  roles:
    - Juniper.junos
  tasks:
    - name: Create formatted date string for 2 AM tomorrow
      set_fact:
        tomorrow: "{{ now(fmt='%y%m%d') | int + 1 }}0200"
    - name: Request reboot at 2 AM
      juniper_junos_system:
        action: "reboot"
        at: "{{ tomorrow }}"
      register: response
    - name: Print the response
      debug:
        var: response.mg

PLAY [Schedule Juniper system(s) to reboot at 2 AM] *********************************************************************************************************************************TASK [Create formatted date string for 2 AM tomorrow] *******************************************************************************************************************************ok: [test129.emu.edu]TASK [Request reboot at 2 AM] *******************************************************************************************************************************************************changed: [test129.emu.edu]TASK [Print the response] ***********************************************************************************************************************************************************ok: [test129.emu.edu] => {    "response.msg": "reboot successfully initiated. Response got Shutdown at Thu Jul 11 02:00:00 2024. [pid 16959]"}PLAY RECAP **************************************************************************************************************************************************************************test129.emu.edu            : ok=3    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0