I think what you're after is the "magic" groups and hostvars variables:
http://docs.ansible.com/ansible/latest/playbooks_variables.html#magic-variables-and-how-to-access-information-about-other-hosts
These let you access the information about what hosts are in a group and
the facts about those hosts. Combining these with a loop using the template
module should give you what you want.
For example, lets assume you wanted to produce a list of the webservers in
your loadbalancer configuration. You could do something like
- hosts: loadbalancer
tasks:
- template:
src: mytemplate.j2
dest: list-of-hosts
Then the template file would look something like:
{% for host in groups['webservers'] %}
{{ hostvars[host]['ansible_hostname'] }}
{% endfor %}
What this is doing is looping over all the hosts in the webservers group,
then pulling out the ansible_hostname fact for each host. You can pull out
whatever fact it is you want from the other hosts.
Hope that helps
Ed
On Thu, 8 Mar 2018 at 3:39 AM, belajzus wrote:
> Hi to all,
>
> I need to generate some file, and inside that file is some content from
> multiple hosts.
> I've done that using template module, so I generate one file on every
> host, delegate that to localhost, and with assemble module all that files I
> merge to one single file.
> Is that OK, or is it the better way to do the same.
> I try with blockinfile module, but it always override current content of
> some file, and I'm not sure is it possible to generate new file with
> blockinfile module.
> I would like to run playbook on the group, collect some data with custom
> facts, and those custom facts from all hosts use to populate one single
> file on control machine for example.
>
> Tnx for any help
>
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