.. _config-drive-format:

Change the configuration drive format
-------------------------------------

For legacy reasons, Fuel uses the VFAT configuration drive format which is the
default option for live migration. But as the default format of the
configuration drive for OpenStack environments is ISO 9660, you can change the
VFAT to the ISO 9660 format using the ``config_drive_format`` option.

**To change the configuration drive format using Fuel CLI:**

#. Log in to the Fuel Master node CLI.
#. Download the configuration files:

   .. code-block:: console

     fuel --env=<env_ID> deployment --default

   The default deployment information is downloaded to
   ``/<cwd>/deployment_<env_ID>``.

#. Edit *every* ``<node-id>.yaml`` file:

   #. Find or add the ``compute`` section to the ``<node-id>.yaml`` file.
   #. In this section, add the following parameter:

      .. code-block:: console

        compute:
         config_drive_format option: iso9660

#. Upload the updated configuration files to the ``/<cwd>/deployment_<env_ID>``
   directory:

   .. code-block:: console

     fuel --env=<env_ID> deployment --upload

   Now, you can proceed with the environment deployment.