You need a play:
- hosts: localhost
gather_facts: false
tasks:
- shell: docker ps
delegate_to: '{{item}}'
with_items: '{{groups["servers"]}}'
register: mytest
when: mytest is undefined or mytest is failed
basically you are looping over the group and will execute the task
when 'test is undefined' which means that you never ran the task
(first host) or test is defined but has failed (only if previous hosts
failed, skip if previous succeed or skipped).
--
----------
Brian Coca
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