ding.yml

---
# This is running on four hosts. ie:
# [webservers]
# myhost-A
# myhost-B
# myhost-C
# myhost-D
#
# myhost-C is not special.

- my_module: >
    any=options
    you=want

# Now that my_module has run on all four hosts, 
# they have custom facts. "my_fact", "my_fact.whatever"
# Except for myhost-C. That host has none defined.

- template: >
    src=/files/server_{{ inventory_hostname or something }}/template.j2
    dest=/var/www/bungus
  when: my_fact is defined