getting the fqdns of all the hosts in a group

[James Martin]

I have a command that needs the fqdn's of all servers within an
inventory group as input.

- name: run special command
command: mycommand "foo.host bar.host baz.host"


Is there a simple way to create such a string without having to write
out a template, cat it, register it, and using the registered
variable's stdout?


Thanks,

James

[Michael DeHaan]

Can you get away with using the inventory hostnames?   I'm guessing perhaps not.

{{ ",".join(groups.webservers) }}

It would probably require writing a lookup plugin.

{{ lookup("jsm_magic_all_my_facts", "webservers", "ansible_hostname") }}

 

Others may have better suggestions but that's what my brain is thinking currently :)

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[Kahlil Hodgson]

You might be able to chain together the map filter with something
(untested) like:

{{ hostvars.websevers|map(attribute='ansible_fqdn')|join(', ') }}

Probably need another link in the chain to get a list of vars for a
group or some magic slicing.

K

Kahlil (Kal) Hodgson GPG: C9A02289
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[Mark Casey]

I was trying to get IPs from multiple hosts instead of their hostnames. I found a solution from another thread and adapted it. (...and am just cross linking in the hopes of helping the next person http://xkcd.com/979/ :)

https://groups.google.com/d/msg/ansible-project/LWRGQQYPtqs/b7rOazw36vQJ

HTH,
Mark