strange variable behaviour/error

[Alfredo De Luca]

Hi all. 

I have ansible 2.9.7 running on ubuntu. I am just running some test and one is to create an inventory by a template. 

All good except when I use the template it says 

fatal: [instance]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'network_interface' is undefined"}

Now here is the inventory.j2 snip 

<SNIP>

[control]
{{ osk_nodes.split(',')[0] }}

[compute]
{% for node_ip in osk_nodes.split(',') %}
{{node_ip}}
{% endfor %}

[all:vars]
network_interface=eno1

<SNIP>

Not sure why it keep saying undefined variable. where I specifically set the network_interface to eno1.

Any ideas/suggestions?

Cheers

--

/Alfredo

[Jean-Yves LENHOF]

Hi,

Please give us a small case with all the pieces and how you run it (ansible-playbook )... You speak about an inventory but it is a template, sound strange given like this...

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[Alfredo De Luca]

Apologies if it wasn't clear.

So it's a playbook that create an inventory file from a template for kolla-ansible so it can install Openstack. 

here is the playbook

---
- name: TEMPLATES
  file:
      path: "{{ deploy_env }}/my_envs/openstack/{{ deploy_env }}"
      state: directory
      mode: 0755

- name: Create inventory file from a template
  template:
      src: templates/osk_inventory.j2
      dest: "{{ deploy_env }}/my_envs/openstack/{{ deploy_env }}/osk_inventory_{{ deploy_env }}"
      owner: root
      group: root

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/Alfredo

[Dick Visser]

This list is about ansible itself, but your issue seems to be highly specific to the "kolla" framework:

https://docs.openstack.org/project-deploy-guide/kolla-ansible/latest/

I would start by reaching out to that community for support first as their users will have much more experience with the mechanics of "kolla".

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[Alfredo De Luca]

I thought about writing to the community and ask...but before doing that I took the playbook and the template and create a simple project with molecule.

Then the same issue. no kolla-ansible/kolla involved at all. 

So must be something else.

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--

/Alfredo

[Jean-Yves LENHOF]

OK here is the playbook. What is the complete template, the inventory you use and the command you've used ?

Regards,

[Dick Visser]

So far you only provided bits of information, like variables without values etc.

We can't magically guess what your environment looks like.

Please come up with a clear isolated, reproducible playbook, including templates, inventory, etc.

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[Alfredo De Luca]

hi all.

I figured out why I was having that issue.

The problem was into the jinja2 templates where I found out that if I line starts with # it's not interpreted as a comment  and so why ansible kept throwing errors on undefined variable. 

ISSUE

[control:vars]
#kolla_external_vip_interface="{{ network_interface }}"    <------------- WRONG 

so here the playbook had issues with undefined variable (network_interface)

but cause for me was commented I couldn't understand the error.

FIX

[control:vars]
{#kolla_external_vip_interface="{{ network_interface }}"##}   <--------- RIGHT

This is a proper comment which now doesn't appear in the target file.

Cheers

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/Alfredo