Re: [ansible-project] Using dictionary keys as a list in with_items

[Michael DeHaan]

You should use the wait_for module to wait on the guests until they are running.

On Fri, May 17, 2013 at 9:20 AM, Rik Theys <rik....@gmail.com> wrote:

Hi,

I'm creating a playbook in which I register a variable to hold the virt info output:

   - name: build info on guests
     action: virt command=info
     register: vminfo

In a followup task I want to add running guests to a group:

   - name: add running guests to new group
     action: add_host hostname=${item} groupname=running_vms
     with_items: $vminfo
     only_if: "'${item.status}' == 'running'"

This fails because with_items expects a list and I'm providing a dictionary.

Is there a way to make with_items use the keys of the dictionary as list items?

Regards,

Rik

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[C. Morgan Hamill]

Excerpts from Rik Theys's message of 2013-05-17 09:20:26 -0400:

> Hi,
>
> I'm creating a playbook in which I register a variable to hold the virt
> info output:
>
> - name: build info on guests
> action: virt command=info
> register: vminfo
>
> In a followup task I want to add running guests to a group:
>
> - name: add running guests to new group
> action: add_host hostname=${item} groupname=running_vms
> with_items: $vminfo
> only_if: "'${item.status}' == 'running'"
>
> This fails because with_items expects a list and I'm providing a dictionary.
>
> Is there a way to make with_items use the keys of the dictionary as list
> items?

I know this works in normal jinja2 templates:

'{{ item.keys() }}'

So that might work in Ansible 1.2 (devel from git).

If you need something more complicated, you could always write a filter
plugins, which I'm fairly sure works with the jinja-style substitutions.
--
C. Morgan Hamill
<cha...@wesleyan.edu>

[Michael DeHaan]

Aside:  if using 1.2 you should not be using only_if.

It's a legacy syntax that requires a lot of confusing quoting, and uses the variable system that is unlike templates, where we are consolidating now.

The new way is just this, much simpler:

when: foo.status == 'running'

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Michael DeHaan <mic...@ansibleworks.com>
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http://www.ansibleworks.com/

[Kahlil Hodgson]

Here's and example using the Jinja2's dictsort filter to turn a dictionary into a list of (key,value) pairs which you can than iterate over with with_items:

vars:
    databases:
      service:
        user:  service_app
        pass:  'secret'

      website:
        user:  website_app
        pass:  'secret'

      brand_demo1:
        user:  demo1_app
        pass:  'secret'

tasks:
    - name: setup database users
      postgresql_user: name={{ item.1.user }} password={{ item.1.pass }}
      sudo_user: postgres
      with_items: databases|dictsort

Hope this helps.

Kal

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[Mischa ter Smitten]

Thanks for the great tip!

with_items: "{{ databases.keys() }}"

also seems to work, but then you would have no access to the values :-)

[Mircea Vutcovici]

It is possible to have access to the value. For you case you can use: {{ database[item] }}