Ansible Playbook Vars vs Host Fact Vars Demonstration

demo_playbook_vs_host_fact_vars.playbook.yml

- hosts: example.com
  gather_facts: no
  
  vars:
    timestamp_var: "{{ lookup('pipe', 'date +%H:%M:%S') }}"
  
  tasks:
    - name: Set the playbook timestamp (so it doesn't change)
      set_fact:
        timestamp_host_fact: "{{ lookup('pipe', 'date +%H:%M:%S') }}"
    
    - debug:
        msg: "timestamp_var: {{ timestamp_var }} / timestamp_host_fact: {{ timestamp_host_fact }}"
    
    - pause:
        seconds: 3
    
    - debug:
        msg: "timestamp_var: {{ timestamp_var }} / timestamp_host_fact: {{ timestamp_host_fact }}"