Final solution:
{% for interface in ansible_interfaces if interface != 'lo' %}{{
hostvars[inventory_hostname]['ansible_' + interface]['ipv4']['address'] }}
{{ lookup('dig', hostvars[inventory_hostname]['ansible_' +
interface]['ipv4']['address'] + '/PTR').rstrip('.') }} {{ lookup('dig',
hostvars[inventory_hostname]['ansible_' + interface]['ipv4']['address'] +
'/PTR').split('.')[0] }}
{% endfor %}
results in :
1.2.3.4 hostname.mydomain.com hostname
2.3.4.5 hostname-alt.otherdomain.com hostname-alt
This of course assumes that DNS has been properly set beforehand...
On Friday, January 29, 2016 at 11:17:47 AM UTC-6, Dayton Jones wrote:
>
> I'm trying to dynamically set /etc/hosts based on the ipv4 address
> assigned to all the interfaces on a host... my template reads as such
>
>
> 127.0.0.1 localhost.localdomain localhost
>
> {% for item in ansible_interfaces if item != 'lo' %}
>
> {{ 'ansible_' + item + '.ipv4.address' }} {{ lookup('dig', 'ansible_' +
> item + '.ipv4.address' + '/PTR') }}
>
> {% endfor %}
>
>
> which results in :
>
> 127.0.0.1 localhost.localdomain localhost
>
> ansible_eth1.ipv4.address NXDOMAIN
>
> ansible_eth0.ipv4.address NXDOMAIN
>
>
>
> I've tried several iterations, but I'm struggling to find the proper
> syntax to get the file to write as expected... is this possible? Any
> suggestions greatly appreciated.
>
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