Hi. The "is defined" portion is failing because of the 'ipv4' subkey
failure. You will have to do something like this:
{% if 'ipv4' in hostvars[host]['ansible_eth1'] and
hostvars[host]['ansible_eth1']['ipv4']['address'] is defined %}
If that's still not working, and ansible_eth1 does have the 'ipv4' entry,
then this is most likely a fact-gathering issue, where the targeted host
hasn't yet gathered facts. If so, you can make sure facts are gathered
about all systems by adding a simple initial play to your playbook:
- hosts: all
gather_facts: yes
Hope that helps!
James Cammarata
Director, Ansible Core Engineering
github: jimi-c
On Thu, Apr 2, 2015 at 5:33 PM, J <[email protected]> wrote:
> All,
>
> I'm attempting to use a conditional in a template, without success.
> Specifically I'm trying to add an iptable rule that allows traffic sourced
> from eth1 on all hosts:
>
> Below is the relevant portion of the template:
>
> {% if 'eth1' in ansible_interfaces %}
> {% if hostvars[host]['ansible_eth1']['ipv4']['address'] is defined %}
> -A INPUT -s {{ hostvars[host]['ansible_eth1']['ipv4']['address'] }} -j
> ACCEPT
> {% endif %}
> {% endif %}
> {% endfor %}
>
> Unfortunately the playbook still errors out:
>
> fatal: [test2] => {'msg': "AnsibleUndefinedVariable: One or more undefined
> variables: 'dict object' has no attribute 'ipv4'", 'failed': True}
>
> This server does indeed have an eth1 interface but said interface does
> _not_ have an IP address in this particular case.
>
> This "if x is defined" syntax seems to work fine in a "when:" conditional
> in the playbook, just not in the template itself.
>
> Any thoughts on what I may be doing wrong and how to rectify this error /
> problem?
>
> Many thanks!
>
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