stop task on all hosts when task is finished in any of them

[Ivo Jimenez]

I've been trying to find a way of accomplishing this (what the subject says). I thought on using blocks, for example:

- block:
  - name: run task
    command: <my-command>
    register: command_result
    failed_when: command_result.changed
  rescue:
  - name: stop task on all other nodes
    command: <stop-command>
    delegate_to: '{{ item }}'
    with_items: '{{ groups.all }}'

Can you think of any other alternative?

Thanks!

[Ivo Jimenez]

Forgot to mention that the reason what the above doesn't work is because the `rescue` tasks are executed only after _all_ the hosts have finished executing the task

[Kai Stian Olstad]

On Tuesday, 14 November 2017 01.06.51 CET Ivo Jimenez wrote:
> Forgot to mention that the reason what the above doesn't work is because
> the `rescue` tasks are executed only after _all_ the hosts have finished
> executing the task

Maybe strategy: free will help.
https://docs.ansible.com/ansible/latest/playbooks_strategies.html#strategies


--
Kai Stian Olstad

[Ivo Jimenez]

Thanks for the suggestion. The problem is that I have other tasks (like local_action) that are not compatible with 'strategy: free'

[Kai Stian Olstad]

On Tuesday, 14 November 2017 19.14.08 CET Ivo Jimenez wrote:
> Thanks for the suggestion. The problem is that I have other tasks (like
> local_action) that are not compatible with 'strategy: free'

To my knowledge strategy free and local_action is not a problem, do mean that you task is not compatible?

If so you are pretty much out of luck since strategy linear work by running all task on all host before advancing to the next.
One thing could be to split the play in three.
One play with linear, one with free that only run that particular task, and then the last play with linear again.

--
Kai Stian Olstad

[Ivo Jimenez]

Sorry, I meant ‘run_once’ (it’s incompatible because every host is going on independently). I think I’ll go with having multiple playbooks. Thanks!

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