get ansible_fqdn from all hosts in a group

Question

I am trying to get the ansible_fqdn from all hosts in a group with something in a template with something like this

{% for host in  groups.all %}
{{ hostvars[host].ansible_fqdn }}
{% endfor %}

Or using:

{% for host in query('inventory_hostnames', target) | map('extract', hostvars, 'inventory_hostname') %}
{{ hostvars[host].ansible_fqdn }}
{% endfor %}

In all cases I get:

"AnsibleUndefinedVariable: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'ansible_fqdn'"

I do notice that if I just "print/write":

{{ hostvars[host] }}

The ansible_fqdn is within facter_networking, but also trying:

{{ hostvars[host][facter_networking].fqdn }}

or

{{ hostvars[host][facter_networking].fqdn }}

I get:

fatal: [10.25.176.10]: FAILED! => {
"changed": false,
"msg": "AnsibleUndefinedVariable: ansible.vars.hostvars.HostVarsVars object has no element  {
'domain': 'test-x',
'fqdn': 'TEST-X.example.org',
'hostname': 'TEST-X',
'interfaces': {
    'ens192': {
        'bindings': [{
            'address': '10.25.176.10',
            'netmask': '255.255.254.0',
            'network': '10.25.176.0'
        }, {
            'address': '10.25.177.226',
            'netmask': '255.255.252.0',
            'network': '10.25.176.0'
        }],
        'ip': '10.25.176.10',
        'mac': '00:50:56:8f:ce:ca',
        'mtu': 1500,
        'netmask': '255.255.254.0',
        'network': '10.25.176.0'
    },
    'lo': {
        'bindings': [{
            'address': '127.0.0.1',
            'netmask': '255.0.0.0',
            'network': '127.0.0.0'
        }],
        'ip': '127.0.0.1',
        'mtu': 65536,
        'netmask': '255.0.0.0',
        'network': '127.0.0.0'
    }
},
'ip': '10.25.176.10',
'mac': '00:50:56:8f:ce:ca',
'mtu': 1500,
'netmask': '255.255.254.0',
'network': '10.25.176.0',
'primary': 'ens192'
}
}

If I use:

{{ hostvars[host].facter_networking }}

I get:

"msg": "AnsibleUndefinedVariable: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'facter_networking'

The data is there but any idea about how could I extract it?

This is the playbook:

- name: Gathering info
  action: setup

- name: Create .pgpass
  template:
    src: pgpass.j2
    dest: /home/postgres/.pgpass
    owner: postgres
    group: postgres
    mode: 0600

Answer 1

The Ansible facts gathered for the hosts can be accessed from within the ansible_facts dictionary. So, to access a host's fqdn, you would have to access hostvars[host]['ansible_facts']['fqdn'].

Since we are iterating over groups['all'], just make sure that the gather facts task is running on - hosts: all as well.

So, using the above method, the template could look like this:

{% for host in groups['all'] %}
{{ hostvars[host]['ansible_facts']['fqdn'] }}
{% endfor %}

Note that the ansible_ prefix is not required, i.e. fqdn instead of ansible_fqdn.