something like:
- name: find another host to join to form a cluster (e.g. Consul)
set_fact:
host_to_join: >
{{
(groups['my_group'] | difference([inventory_hostname])
| random
| intersection(hostvars.keys())
).'ec2_private_ip_address'
}}
On Tue, Jul 7, 2015 at 6:39 AM, Valentin Fadeev
<[email protected]> wrote:
> Recently I had to write templates containing somewhat long filter pipelines.
> Part of the logic involved lookuping current output of the pipeline in a
> dictionary (hostvars) and then extracting the value of a field of the
> resulting dictionary. In order to keep things decoupled I wrote two almost
> trivial plugins. Here an example:
>
> - name: find another host to join to form a cluster (e.g. Consul)
> set_fact:
> host_to_join: >
> {{
> groups['my_group'] | difference([inventory_hostname])
> | list
> | random
> | find_in(hostvars)
> | get_key('ec2_private_ip_address')
> }}
>
> Just wondering whether there are other existing ways of achieving the same
> result, with/without plugins, as surely someone must have faced a similar
> task.
>
> Thanks
> Valentin
>
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Brian Coca
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