Re: [ansible-project] How does 'register' behave when paired with 'with_items' ?

[Serge van Ginderachter]

On 1 April 2013 14:39, André Bierlein <andre.mt...@gmail.com> wrote:

I'm trying to get into Ansible and was studying some examples. One of the examples lists a task that contains both 'with_items' and 'register'.

The registered variable will be a list of its own, which you would have to loop through, something like

- ..

  with_items: $last_run

As far as I understood the docs, with_item acts like a loop. Does register work on the last item only? Does it register an array of results?

An array of results.​​

[André Bierlein]

Thanks for that answer!

I do have another question though. In the example link I added to my first post, the second task looks like:

- name: Reload the haproxy
  service: name=haproxy state=reloaded
  delegate_to: $item
  with_items: ${groups.lbservers} 
  only_if: ${last_run.changed}

That one would be incorrect then, I guess, because $last_run.changed would not exist?

[Serge van Ginderachter]

On 3 April 2013 09:57, André Bierlein <andre.mt...@gmail.com> wrote:

That one would be incorrect then, I guess, because $last_run.changed would not exist?

​That's correct. You would need to do something with "with_items: $last_run"

I *think* there might be a way to address the earlier items (from ${groups.lbservers} ) within $last_run, but those nested lists keep me confused, as the outputted items from ansible-playbook are barely readeable.

  Serge

 

[benno joy]

Hey Andre,

The register variable will have $last_run.changed element even if it is an array, I think the value is an OR of the 'changed. Array. So for a single node in lbservers the above code would be fine, but if more than one nodes are there in the group this would have to changed to something like this:

  - name: Reload the haproxy

    service: name=haproxy state=reloaded

    delegate_to: ${item.item}

    only_if: ${item.changed}

    with_items: ${last_run.results}

I will test this out and update the repository, thanks for pointing this out.

Benno

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