.. contents:: Topics


Vars Plugins
------------

Vars plugins inject additional variable data into Ansible runs that did not come from an inventory source, playbook, or command line. Playbook constructs like 'host_vars' and 'group_vars' work using vars plugins.

Vars plugins were partially implented in Ansible 2.0 and rewritten to be fully implemented starting with Ansible 2.4.

The :doc:`host_group_vars <vars/host_group_vars>` plugin shipped with Ansible enables reading variables from :ref:`host_vars` and :ref:`group_vars`.


Enabling Vars Plugins
+++++++++++++++++++++

You can activate a custom vars plugins by either dropping it into a ``vars_plugins`` directory adjacent to your play,  inside a role, or by putting it in one of the directory sources configured in :doc:`ansible.cfg <../config>`.

Plugin Lists
++++++++++++

You can use ``ansible-doc -t vars -l`` to see the list of available plugins. 
Use ``ansible-doc -t vars <plugin name>`` to see specific plugin-specific documentation and examples.


.. toctree:: :maxdepth: 1
    :glob:

    vars/*

.. seealso::

   :doc:`action`
       Ansible Action plugins
   :doc:`cache`
       Ansible Cache plugins
   :doc:`callback`
       Ansible callback plugins
   :doc:`connection`
       Ansible connection plugins
   :doc:`inventory`
       Ansible inventory plugins
   :doc:`shell`
       Ansible Shell plugins
   :doc:`strategy`
       Ansible Strategy plugins
   `User Mailing List <http://groups.google.com/group/ansible-devel>`_
       Have a question?  Stop by the google group!
   `irc.freenode.net <http://irc.freenode.net>`_
       #ansible IRC chat channel
