Ansible/jinja2: Use filter result in if condition

Question

is it possible to use the result of Jinja2 filters in conditions in ansible playbooks?

I'm trying to get this working, but without success:

{% if (item | ipv4) %}{{ item }}{% else %}{{ lookup('dig', item) }}{% endif %}}

where item in my current test is set to localhost (and could be any other private or public domain).

Should do: If item is an IPv4 address the adress should be returned, otherwise it should be "converted" (DNS lookup with dig) to an IPv4 address - but it always is returning the hostname.

Any idea?

Thanks in advance Matthias

Blinkers

Answer 1

Try

{{ item if (item | ipv4) else lookup('dig',item) }}

Sholokhov

Thank you! With Ubuntu 16.04 you need also the packages python-netaddr and python-dnspython – Blinkers