Working with Facts

- name: Display OS info
  debug:
    msg: "OS is {{ ansible_distribution }} version {{ ansible_distribution_version }}"

- name: Display memory info
  debug:
    msg: "Total RAM is {{ ansible_memory_mb.real }} MB"

- name: Display host facts
  hosts: all
  tasks:
    - name: Show FQDN and OS family
      debug:
        msg: "Host: {{ ansible_fqdn }}, OS: {{ ansible_os_family }}"

<h1>{{ ansible_hostname }}</h1>
<p>Kernel: {{ ansible_kernel }}</p>
<p>Memory: {{ ansible_memory_mb.total }} MB</p>

- name: Display system memory
  hosts: all
  tasks:
    - name: Show total memory
      debug:
        msg: "Total Memory: {{ ansible_memtotal_mb }} MB"

    - name: Show CPU count
      debug:
        msg: "Number of CPUs: {{ ansible_processor_count }}"

    - name: Show OS distribution
      debug:
        msg: "OS Distribution: {{ ansible_distribution }} {{ ansible_distribution_version }}"

- name: Gather network facts
  ansible.netcommon.network_cli:
    command: show version
  register: result

- name: Display network OS
  debug:
    msg: "OS is {{ ansible_network_os }}"

- name: Display interface information
  debug:
    msg: "Interface {{ item.key }} has MTU {{ item.value.mtu }}"
  loop: "{{ ansible_net_interfaces | dict2items }}"

- name: Display OS information
  hosts: all
  tasks:
    - name: Show OS family
      debug:
        msg: "OS Family is {{ ansible_os_family }}"

    - name: Show distribution version
      debug:
        msg: "Distribution Version is {{ ansible_distribution_version }}"

- name: Gather facts and filter by OS family
  hosts: all
  gather_facts: yes
  tasks:
    - name: Display OS family fact
      debug:
        msg: "OS Family is {{ ansible_os_family }}"

    - name: Conditionally execute based on OS family
      command: echo "Running on RedHat-like system"
      when: ansible_os_family == 'RedHat'

- name: Check memory usage
  hosts: all
  gather_facts: yes
  tasks:
    - name: Display total memory in MB
      debug:
        msg: "Total Memory: {{ ansible_memory_mb['real']['total'] }} MB"

    - name: Alert if memory less than 2GB
      debug:
        msg: "Warning: Low memory detected"
      when: ansible_memory_mb['real']['total'] < 2048

- name: Get default network interface
  hosts: all
  gather_facts: yes
  tasks:
    - name: Display default IPv4 address
      debug:
        msg: "Default IP Address is {{ ansible_default_ipv4['address'] }}"

    - name: List all network interfaces
      debug:
        msg: "Network Interfaces: {{ ansible_interfaces }}"

- name: Set custom facts
  set_fact:
    app_version: "2.1.0"
    deployment_date: "2026-04-05"

- name: Use custom facts in a task
  debug:
    msg: "App version is {{ app_version }}"

- name: Create config file with custom facts
  template:
    src: app_config.j2
    dest: /etc/app/config.json

{"version": "{{ app_version }}", "deployed_on": "{{ deployment_date }}"}

[defaults]
fact_caching = redis
fact_caching_connection = redis://localhost:6379/0
fact_caching_timeout = 3600

---
- hosts: all
  gather_facts: false
  tasks:
    - name: Print a message
      debug:
        msg: "No facts gathered"

- name: Set local facts
  set_fact:
    ansible_local:
      myapp:
        version: "1.0"
        status: "running"

- name: Display local facts
  debug:
    msg: "App version is {{ ansible_local.myapp.version }}"

- name: Refresh facts mid-playbook
  hosts: all
  tasks:
    - name: Gather facts again
      setup:
        refresh: true
      delegate_to: localhost