ansible-playbook: How to gather facts from machine Y although you run with --limit="X"

[Eric Feliksik]

I have an ansible role for machine X that uses use {{ hostvars['Y']['network_address'] }} in a task. 

If I run 'ansible-playbook -i inventories/dev site.yml --limit="X"' (Vagrant also runs it with --limit) this variable is not available. How can I explicitly declare the dependency on the host Y in the ansible playbook, such that ansible gathers facts (in this case, the ./host_vars/Y file) for host Y? 

Thanks in advance, 

Eric

[Ulrich Hochholdinger]

Hi Eric,
You can describe the inventory on the commandline (look on the trailing comma in the inventory-option ;-D): 

ansible-playbook -i"X,Y," site.yml

then inside your playbook have one "hosts: all" only for fact gathering and another for "hosts: X" for the tasks to run on host X.

Cheers
      Ulli

[Tom Bamford]

Hi Eric

There is a feature called Fact Caching which can facilitate this: http://docs.ansible.com/playbooks_variables.html#fact-caching

Regards

Tom

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