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from oslo_config import cfg

config_drive_opts = [
    cfg.StrOpt('config_drive_format',
        default='iso9660',
        deprecated_for_removal=True,
        deprecated_since='19.0.0',
        deprecated_reason="""
This option was originally added as a workaround for bug in libvirt, #1246201,
that was resolved in libvirt v1.2.17. As a result, this option is no longer
necessary or useful.
""",
        choices=[
            ('iso9660', 'A file system image standard that is widely '
             'supported across operating systems.'),
            ('vfat', 'Provided for legacy reasons and to enable live '
             'migration with the libvirt driver and non-shared storage')],
        help="""
Config drive format.

Config drive format that will contain metadata attached to the instance when it
boots.

Related options:

* This option is meaningful when one of the following alternatives occur:

  1. ``force_config_drive`` option set to ``true``
  2. the REST API call to create the instance contains an enable flag for
     config drive option
  3. the image used to create the instance requires a config drive,
     this is defined by ``img_config_drive`` property for that image.

* A compute node running Hyper-V hypervisor can be configured to attach
  config drive as a CD drive. To attach the config drive as a CD drive, set the
  ``[hyperv] config_drive_cdrom`` option to true.
"""),
    cfg.BoolOpt('force_config_drive',
        default=False,
        help="""
Force injection to take place on a config drive

When this option is set to true config drive functionality will be forced
enabled by default, otherwise users can still enable config drives via the REST
API or image metadata properties. Launched instances are not affected by this
option.

Possible values:

* True: Force to use of config drive regardless the user's input in the
        REST API call.
* False: Do not force use of config drive. Config drives can still be
         enabled via the REST API or image metadata properties.

Related options:

* Use the 'mkisofs_cmd' flag to set the path where you install the
  genisoimage program. If genisoimage is in same path as the
  nova-compute service, you do not need to set this flag.
* To use a config drive with Hyper-V, you must set the
  'mkisofs_cmd' value to the full path to an mkisofs.exe installation.
  Additionally, you must set the qemu_img_cmd value in the hyperv
  configuration section to the full path to an qemu-img command
  installation.
"""),
    cfg.StrOpt('mkisofs_cmd',
        default='genisoimage',
        help="""
Name or path of the tool used for ISO image creation.

Use the ``mkisofs_cmd`` flag to set the path where you install the
``genisoimage`` program. If ``genisoimage`` is on the system path, you do not
need to change the default value.

To use a config drive with Hyper-V, you must set the ``mkisofs_cmd`` value to
the full path to an ``mkisofs.exe`` installation. Additionally, you must set
the ``qemu_img_cmd`` value in the hyperv configuration section to the full path
to an ``qemu-img`` command installation.

Possible values:

* Name of the ISO image creator program, in case it is in the same directory
  as the nova-compute service
* Path to ISO image creator program

Related options:

* This option is meaningful when config drives are enabled.
* To use config drive with Hyper-V, you must set the ``qemu_img_cmd``
  value in the hyperv configuration section to the full path to an ``qemu-img``
  command installation.
"""),
]


def register_opts(conf):
    conf.register_opts(config_drive_opts)


def list_opts():
    return {"DEFAULT": config_drive_opts}