Using set_stats

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1

Hi all,

Before using set_stats in Ansible Tower, I’m doing some test to understand it.
I’m taking the hostname in playbook via set_stats but I cannot check if my variable are correct.
Here’s my script portion:

2

I'm taking the hostname in playbook via set_stats but I cannot check if my
variable are correct.
---
- hosts: all
  gather_facts: yes

  pre_tasks:
    - name: get the hostname
      set_stats:
        data:
          inv_host: "{{ inventory_hostname }}"
   
    - name: get result
      debug:
        msg: "{{ inv_host}}"
[...]
And here's the result:
fatal: [xx.xx.xx.xx]: FAILED! => ... The error was: 'inv_host' is undefined

The variable "inv_host" is valid in the context of custom status
only. The module set_stats works as expected. For example

cat pb.yml

- hosts: localhost
  tasks:
    - set_stats:
        data:
          inv_host: "{{ inventory_hostname }}"

ANSIBLE_SHOW_CUSTOM_STATS=True ansible-playbook pb.yml

   ...
PLAY RECAP **************************************************
localhost: ok=2 changed=0 unreachable=0 failed=0 skipped=0
           rescued=0 ignored=0

CUSTOM STATS: ***********************************************

  RUN: inv_host: localhost

3

Hi Vladimir,

Ok, It’s running in this context by me too, thank you for your help…
Does this means, that we cannot parse this variable in this role?

Best regards,
H

4

The set_stats module does not make the “stats” available to the current playbook.

The workflow from tower is effectively to use set_stats to accumulate some data for a subsequent playbook in a workflow, then tower collects these stats, and passes them back in as extra-vars. So effectively, they are only useful to the subsequent playbooks in a workflow.

I have an example callback and instructions that showcase this flow outside of tower:

https://gist.github.com/sivel/eaa83e2b1c36719359e0671afa8cd039

If you want the vars available from within the current playbook, and the subsequent playbook, you will need both a set_facts and a set_stats task.