===================
Configuration Guide
===================

The static configuration for nova lives in two main files: ``nova.conf`` and
``policy.json``. These are described below. For a bigger picture view on
configuring nova to solve specific problems, refer to the :doc:`Nova Admin
Guide </admin/index>`.

Configuration
-------------

* :doc:`Configuration Guide </admin/configuration/index>`: Detailed
  configuration guides for various parts of your Nova system. Helpful
  reference for setting up specific hypervisor backends.

* :doc:`Config Reference <config>`: A complete reference of all
  configuration options available in the ``nova.conf`` file.

.. only:: html

   * :doc:`Sample Config File <sample-config>`: A sample config
     file with inline documentation.

.. # NOTE(mriedem): This is the section where we hide things that we don't
   # actually want in the table of contents but sphinx build would fail if
   # they aren't in the toctree somewhere.
.. # NOTE(amotoki): toctree needs to be placed at the end of the secion to
   # keep the document structure in the PDF doc.
.. toctree::
   :hidden:

   config

.. # NOTE(amotoki): Sample files are only available in HTML document.
   # Inline sample files with literalinclude hit LaTeX processing error
   # like TeX capacity exceeded and direct links are discouraged in PDF doc.
.. only:: html

   .. toctree::
      :hidden:

      sample-config

Policy
------

Nova, like most OpenStack projects, uses a policy language to restrict
permissions on REST API actions.

* :doc:`Policy Reference <policy>`: A complete reference of all
  policy points in nova and what they impact.

.. only:: html

   * :doc:`Sample Policy File <sample-policy>`: A sample nova
     policy file with inline documentation.

.. # NOTE(mriedem): This is the section where we hide things that we don't
   # actually want in the table of contents but sphinx build would fail if
   # they aren't in the toctree somewhere.
.. # NOTE(amotoki): toctree needs to be placed at the end of the secion to
   # keep the document structure in the PDF doc.
.. toctree::
   :hidden:

   policy

.. # NOTE(amotoki): Sample files are only available in HTML document.
   # Inline sample files with literalinclude hit LaTeX processing error
   # like TeX capacity exceeded and direct links are discouraged in PDF doc.
.. only:: html

   .. toctree::
      :hidden:

      sample-policy

Extra Specs
-----------

Nova uses *flavor extra specs* as a way to provide additional information to
instances beyond basic information like amount of RAM or disk. This information
can range from hints for the scheduler to hypervisor-specific configuration
instructions for the instance.

* :doc:`Extra Spec Reference <extra-specs>`: A complete reference for all extra
  specs currently recognized and supported by nova.

.. toctree::
   :hidden:

   extra-specs