[Ansible 2.4] include_tasks and import_tasks picking the first specified file in a ternary condition

[ishan jain]

Hi,

I was trying out a few sample playbooks to understand the difference between static n dynamic imports, and i am stuck at a point where i am not sure what am i doing wrong. 

hosts.info

[docker]

docker1 ansible_host=0.0.0.0

include_with_vars.yaml

---

- hosts: docker

  tasks:

    - include_tasks: "{{ condition | ternary ('docker1.yaml', 'docker2.yaml') }}"

import_with_vars.yaml

---

- hosts: docker

  tasks:

    - import_tasks: "{{ condition | ternary ('docker1.yaml', 'docker2.yaml') }}"

(docker1.yaml prints "msg": "Tasks 1 Host 1" and docker2.yaml prints "msg": "Tasks 2 Host 2")

No matter how i execute this, it always includes/import docker1.yaml

[root@8a98ab1d7dea include]# ansible --version

ansible 2.4.3.0

  config file = /etc/ansible/ansible.cfg

  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']

  ansible python module location = /usr/lib/python2.7/site-packages/ansible-2.4.3.0-py2.7.egg/ansible

  executable location = /usr/bin/ansible

  python version = 2.7.5 (default, Aug  4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

[root@8a98ab1d7dea include]# ansible-playbook -i hosts.info include_with_vars.yaml -e condition=false

PLAY [docker] ***************************************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************************************

ok: [docker1]

TASK [include_tasks] ********************************************************************************************************************************************************************************

included: /opt/include/docker1.yaml for docker1

TASK [debug] ****************************************************************************************************************************************************************************************

ok: [docker1] => {

    "msg": "Tasks 1 Host 1"

}

PLAY RECAP ******************************************************************************************************************************************************************************************

docker1                    : ok=3    changed=0    unreachable=0    failed=0

[root@8a98ab1d7dea include]# ansible-playbook -i hosts.info include_with_vars.yaml -e condition=true

PLAY [docker] ***************************************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************************************

ok: [docker1]

TASK [include_tasks] ********************************************************************************************************************************************************************************

included: /opt/include/docker1.yaml for docker1

TASK [debug] ****************************************************************************************************************************************************************************************

ok: [docker1] => {

    "msg": "Tasks 1 Host 1"

}

PLAY RECAP ******************************************************************************************************************************************************************************************

docker1                    : ok=3    changed=0    unreachable=0    failed=0

[root@8a98ab1d7dea include]# ansible-playbook -i hosts.info import_with_vars.yaml -e condition=false

PLAY [docker] ***************************************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************************************

ok: [docker1]

TASK [debug] ****************************************************************************************************************************************************************************************

ok: [docker1] => {

    "msg": "Tasks 1 Host 1"

}

PLAY RECAP ******************************************************************************************************************************************************************************************

docker1                    : ok=2    changed=0    unreachable=0    failed=0

[root@8a98ab1d7dea include]# ansible-playbook -i hosts.info import_with_vars.yaml -e condition=true

PLAY [docker] ***************************************************************************************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************************************************************************************

ok: [docker1]

TASK [debug] ****************************************************************************************************************************************************************************************

ok: [docker1] => {

    "msg": "Tasks 1 Host 1"

}

PLAY RECAP ******************************************************************************************************************************************************************************************

docker1                    : ok=2    changed=0    unreachable=0    failed=0

[Kai Stian Olstad]

On Monday, 19 February 2018 16.52.02 CET ishan jain wrote:
> *include_with_vars.yaml*

> ---
> - hosts: docker
> tasks:
> - include_tasks: "{{ condition | ternary ('docker1.yaml',
> 'docker2.yaml') }}"
>

> *import_with_vars.yaml*

> ---
> - hosts: docker
> tasks:
> - import_tasks: "{{ condition | ternary ('docker1.yaml',
> 'docker2.yaml') }}"
>
>
> (docker1.yaml prints "msg": "Tasks 1 Host 1" and docker2.yaml prints "msg":
> "Tasks 2 Host 2")
>
>
> No matter how i execute this, it always includes/import docker1.yaml
>

<snip />

> [root@8a98ab1d7dea include]# ansible-playbook -i hosts.info
> include_with_vars.yaml -e condition=false

Here condition is a string and not a bool so you need

{{ condition | bool | ternary ......


--
Kai Stian Olstad

[Matt Martz]

When supplying extra vars on the command line using key=value syntax, the value will always be a string.  In python (and jinja2) any string with non-zero length is always truthy.  So the strings "true" and "false" are both truthy.

You have a few options:

Use JSON:

-e '{"condition": true}'

Use the |bool filter:

"{{ condition | bool | ternary ('docker1.yaml', 'docker2.yaml') }}"

I'd recommend including the |bool filter regardless, as that is going to ensure things are processed as you expect.

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Matt Martz
@sivel
sivel.net

[ishan jain]

Thanks a lot Kai and Matt,

I was looking for the problem in entirely different area.

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