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ansible/examples/playbooks/roletest.yml

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# in Ansible 1.2 and later, roles allow easy best-practices organization of content
# and maximize shareability of ansible building blocks.
#
# suppose a playbook applied to a group of hosts includes two roles, foo and bar.
#
# what do roles do in this case?
#
# listing the roles as foo and bar will auto include the following:
#
# tasks from ./roles/foo/tasks/main.yml, then ./roles/bar/tasks/main.yml
# handlers from ./roles/foo/handlers/main.yml, then ./roles/bar/handlers/main.yml
# vars from ./roles/foo/vars/main.yml, then ./roles/bar/vars/main.yml
#
# should any of these files not exist, that is ok, and they will simply not be loaded.
#
# should the task file in foo/tasks/main.yml want to include subtasks in other files, that
# is also permitted.
#
# templates and copy operations also get smarter about where to look for content when using
# roles.
#
# as an example, a task in foo/tasks/main.yml could copy or template a file by
# referencing a "src=foo.j2" rather than having to explicitly path src=roles/foo/templates/foo.j2.
---
- hosts: all
roles:
# a role can be listed flat like this:
#
# - common
# - webservers
# but you can also pass variables to them, so they can be parameterized. You can call
# a role more than once with different parameters too. It might look like this:
- { role: foo, param1: 1000, param2: 2000 }
- { role: foo, param1: 8000, param2: 9000 }
# add as many roles as you like, roles takes a list of roles names
# these paths can be qualified, but if bare, it will look from them in
# roles/$rolename relative to the playbook
# explicit tasks and handlers can be used, but are not required.
# they will run after the roles if present.